Taps and Drill Bit Kit

Individual Imperial & Metric Plug Taps
60-Piece Drill Bit Kit
Tap Guides Help Ensure Tapped Holes are
Perpendicular to Flat Surfaces

TTT001

Tap Guide for Optical Tables and Breadboards

TAP1480

1/4"-80 Tap

TW25

Tap Wrench

DK3

60-Piece Drill Bit Kit

Please Wait

Overview
Threading Specs
Feedback

Click to Enlarge
The TAPSM1 Imperial Tap for Tapping Thorlabs' SM1 Standard Threads

Click to Enlarge
The TAPSM05 Imperial Tap for Tapping Thorlabs' SM05 Standard Threads

Features

Wide Selection of Plug Taps Including Thorlabs' SM05 (0.535"-40) and SM1 (1.035"-40) Standards
Drill Kit Includes 60 Drill Bits in an Embossed Steel Case
Universal Tap Wrench is an Essential Tool for Custom Applications
Table and Breadboard Tapping Guide for Repairing Damaged Tapped Holes

The items on this webpage can be used to add taps in user-selected locations and repair damaged tapped holes on breadboards and optical tables.

Click to Enlarge

Threading Specifications

The following is a general overview of screw threading. For more details regarding specifications and dimensions, please consult the Machinery's Handbook, available for purchase at many bookstores.

Features of a Thread
A thread consists of three repeating features: a crest, flank, and root (see drawing to the right). Except in special cases, threads have symmetrical sides inclined at equal angles when a vertical line is drawn through the center of a crest or root. The distance between corresponding points on adjacent threads is known as the pitch of the thread. The flank angle is defined as the angle the flank makes with a perpendicular ray drawn from the screw axis. Unless otherwise stated, threads have a flank angle of 30°, resulting in a total angle between flanks of 60°. Each feature is shown in the diagram to the right.

The major diameter is taken from the crests of a thread while the minor diameter is taken from the roots. For most screws, crests and roots do not terminate at a sharp point, so crest and root truncation values are included in the definitions of major and minor diameter. The pitch diameter is approximately halfway between the major and minor diameters.

Thread Form
A thread form is a set of rules that define the features' scale relative to one another. Common thread forms include the Unified Screw Thread Form, used in the United States of America and measured in imperial units, and the ISO Metric Screw Thread Form, used in many parts of the world and measured with the International System of Units. There are many thread forms in the Unified screw thread standard designated by either UN, which defines a flat root contour, or UNR, which defines a round root contour. These can be further described by appending more letters. For example, an extremely fine thread with a flat root contour is designated UNEF. Those forms which are not standardized by the Unified screw thread system are designated UNS.

Thread Series
Most screws are identified by their thread series. Thread series are denoted by the major diameter and density of threads. Unified threads specify density in threads per inch, while Metric threads specify the thread pitch. For example, in the Unified nomenclature, a 1/4"-20 cap screw has a 1/4" diameter barrel and the pitch is 20 threads per inch (TPI). In metric nomenclature, an M4 x 0.7 cap screw has a 4 mm barrel and the pitch is 1 thread per 0.7 mm. The term M4 x 0.7 is often shortened to just M4.

Unified Thread Class Tolerancing
Location	Loose	Optimal	Strict
Internal	1B	2B	3B
External	1A	2A	3A

Metric Thread Tolerance Positions
Location	Loose	Optimal	Strict
Internal	-	G	H
External	e or f	g	h

Metric Thread Tolerance Grades
Dimension	Location	Tolerance Grades^a
Minor Diameter	Internal	4, 5, 6, 7, 8
Major Diameter	External	4, 6, 8
Pitch Diameter	Internal	4, 5, 6, 7, 8
Pitch Diameter	External	3, 4, 5, 6, 7, 8, 9

The tolerance becomes looser as the grade increases. The underlined grades are used with normal lengths of thread engagement.

Thread Class
The tolerances and allowances on a thread series are given by a thread class. Unified thread classes are alphanumeric identifiers starting with a number from 1 through 3, where 1 is the loosest tolerance and 3 is the tightest, and either A for external threading or B for internal threading.

Metric threads have a slightly more complex tolerancing method that uses tolerancing grades, designated by a number 3 through 9; and tolerancing positions, which use letters e through h. Grades provide a measure of the tolerance itself: the smaller the number, the tighter the tolerance. Positions denote the distance of the tolerance from the pitch diameter. Uppercase positioning letters indicate internal threads while lowercase positioning letters indicate external threads.

Quoting from the Machinery's Handbook, 29th Edition, p. 1885: "To designate the tolerance class, the grade and position of the pitch diameter is shown first followed by that for the major diameter in the case of the external thread or that for the minor diameter in the case of the internal thread, thus 4g6g for an external thread and 5H6H for an internal thread. If the two grades and positions are identical, it is not necessary to repeat the symbols, thus 4g, alone, stands for 4g4g and 5H, alone, stands for 5H5H."

Thorlabs' SM Series Threads
Threading specifications for our SM threads, utilized in our lens tube and cage system components, are given below so that you can machine mating components to suit your application. Most SM series threads utilize a non-standard Unified thread form, indicated by the letters UNS, with a 30° flank angle and a thread class of 2A and 2B. The exception is our SM30 series thread, which is a Metric thread form with a 30° flank angle and a tolerance of 6H/6g. We also offer products with C-Mount and RMS threads, and the specifications for these threads are given below for reference. Please note that other manufacturers may have different tolerances for C-Mount and RMS threads. For other thread specifications that are not listed here, please contact Tech Support.

SM05 Threading: Ø1/2" Lens Tubes, 16 mm Cage Systems
External Thread, 0.535"-40.0 UNS-2A		Internal Thread, 0.535"-40.0 UNS-2B
Max Major Diameter	0.5340"	Min Major Diameter	0.5350"
Min Major Diameter	0.5289"	Min Pitch Diameter	0.5188"
Max Pitch Diameter	0.5178"	Max Pitch Diameter	0.5230"
Min Pitch Diameter	0.5146"	Min Minor Diameter (and 83.3% of Thread)	0.508"
Max Minor Diameter	0.5069"	Max Minor Diameter (and 64.9% of Thread)	0.514"

RMS Threading: Objective, Scan, and Tube Lenses
External Thread, 0.800"-36.0 UNS-2A		Internal Thread, 0.800"-36.0 UNS-2B
Max Major Diameter	0.7989"	Min Major Diameter	0.8000"
Min Major Diameter	0.7934"	Min Pitch Diameter	0.7820"
Max Pitch Diameter	0.7809"	Max Pitch Diameter	0.7866"
Min Pitch Diameter	0.7774"	Min Minor Diameter (and 83.3% of Thread)	0.770"
Max Minor Diameter	0.7688"	Max Minor Diameter (and 64.9% of Thread)	0.777"

C-Mount Threading: Machine Vision Lenses, CCD/CMOS Cameras
External Thread, 1.000"-32.0 UN-2A		Internal Thread, 1.000"-32.0 UN-2B
Max Major Diameter	0.9989"	Min Major Diameter	1.0000"
Min Major Diameter	0.9929"	Min Pitch Diameter	0.9797"
Max Pitch Diameter	0.9786"	Max Pitch Diameter	0.9846"
Min Pitch Diameter	0.9748"	Min Minor Diameter (and 83.3% of Thread)	0.966"
Max Minor Diameter	0.9651"	Max Minor Diameter (and 64.9% of Thread)	0.974"

SM1 Threading: Ø1" Lens Tubes, 30 mm Cage Systems
External Thread, 1.035"-40.0 UNS-2A		Internal Thread, 1.035"-40.0 UNS-2B
Max Major Diameter	1.0339"	Min Major Diameter	1.0350"
Min Major Diameter	1.0288"	Min Pitch Diameter	1.0188"
Max Pitch Diameter	1.0177"	Max Pitch Diameter	1.0234"
Min Pitch Diameter	1.0142"	Min Minor Diameter (and 83.3% of Thread)	1.008"
Max Minor Diameter	1.0068"	Max Minor Diameter (and 64.9% of Thread)	1.014"

SM30 Threading: Ø30 mm Lens Tubes
External Thread, M30.5 x 0.5 – 6H/6g		Internal Thread, M30.5 x 0.5 – 6H/6g
Max Major Diameter	30.480 mm	Min Major Diameter	30.500 mm
Min Major Diameter	30.371 mm	Min Pitch Diameter	30.175 mm
Max Pitch Diameter	30.155 mm	Max Pitch Diameter	30.302 mm
Min Pitch Diameter	30.059 mm	Min Minor Diameter (and 83.3% of Thread)	29.959 mm
Max Minor Diameter	29.938 mm	Max Minor Diameter (and 64.9% of Thread)	30.094 mm

SM1.5 Threading: Ø1.5" Lens Tubes
External Thread, 1.535"-40 UNS-2A		Internal Thread, 1.535"-40 UNS-2B
Max Major Diameter	1.5339"	Min Major Diameter	1.535"
Min Major Diameter	1.5288"	Min Pitch Diameter	1.5188"
Max Pitch Diameter	1.5177"	Max Pitch Diameter	1.5236"
Min Pitch Diameter	1.5140"	Min Minor Diameter (and 83.3% of Thread)	1.508"
Max Minor Diameter	1.5068"	Max Minor Diameter (and 64.9% of Thread)	1.514"

SM2 Threading: Ø2" Lens Tubes, 60 mm Cage Systems
External Thread, 2.035"-40.0 UNS-2A		Internal Thread, 2.035"-40.0 UNS-2B
Max Major Diameter	2.0338"	Min Major Diameter	2.0350"
Min Major Diameter	2.0287"	Min Pitch Diameter	2.0188"
Max Pitch Diameter	2.0176"	Max Pitch Diameter	2.0239"
Min Pitch Diameter	2.0137"	Min Minor Diameter (and 83.3% of Thread)	2.008"
Max Minor Diameter	2.0067"	Max Minor Diameter (and 64.9% of Thread)	2.014"

SM3 Threading: Ø3" Lens Tubes
External Thread, 3.035"-40.0 UNS-2A		Internal Thread, 3.035"-40.0 UNS-2B
Max Major Diameter	3.0337"	Min Major Diameter	3.0350"
Min Major Diameter	3.0286"	Min Pitch Diameter	3.0188"
Max Pitch Diameter	3.0175"	Max Pitch Diameter	3.0242"
Min Pitch Diameter	3.0133"	Min Minor Diameter (and 83.3% of Thread)	3.008"
Max Minor Diameter	3.0066"	Max Minor Diameter (and 64.9% of Thread)	3.014"

SM4 Threading: Ø4" Lens Tubes
External Thread, 4.035"-40 UNS-2A		Internal Thread, 4.035"-40.0 UNS-2B
Max Major Diameter	4.0337"	Min Major Diameter	4.0350"
Min Major Diameter	4.0286"	Min Pitch Diameter	4.0188"
Max Pitch Diameter	4.0175"	Max Pitch Diameter	4.0245"
Min Pitch Diameter	4.0131"	Min Minor Diameter (and 83.3% of Thread)	4.008"
Max Minor Diameter	4.0066"	Max Minor Diameter (and 64.9% of Thread)	4.014"

Posted Comments:

user (posted 2024-05-13 21:30:09.42)

What is the distance from the bottom of the sm05 tap to the first full thread?

cdolbashian (posted 2024-05-24 09:55:56.0)

As the taper on the threads are approximately 5-6 threads deep and the thread pitch is ~.635mm. As such the first full thread starts at around 3-4mm. I have contacted you directly to discuss your application and your need for a perhaps-more-specific value.

Kyle Douglass (posted 2024-03-28 08:32:33.53)

Hello! Would you also happen to sell dies for creating SM1 external threads? I've only been able to find taps on your website. Many thanks.

jdelia (posted 2024-03-28 01:08:31.0)

Thank you for contacting Thorlabs. We unfortunately do not currently offer dies as part of our catalog. I have reached out to you directly to discuss alternative vendors.

chua ss (posted 2023-10-26 15:51:12.683)

Dear Sir/Madam, Kindly quote us the current price and the shipping charges as below ; 1. MACHINE TAP (THOR) PO 0.535" X 40 Q’ty : 5pcs Your prompt reply on the above mentioned is highly appreciated. Thanks and Regards. S.S. Chua (Ms) Purchase Coordinator Creative Precision Engineering Sdn. Bhd. [CO. NO :199101017821 (228132-T)] 32, Lorong IKS Juru 3, IKS Juru, 14100 Simpang Ampat, Penang, Malaysia. Tel : 604-5071330, Ext : 120 H/P : +012-5681921 Email : pur02@creative-pe.com

jdelia (posted 2023-10-26 02:45:19.0)

Thank you for contacting Thorlabs. You may request a quote for the TAPSM05 by reaching out to your local sales team at sales@thorlabs.com or 973-300-3000, or by adding the item to your shopping cart directly on the website.

Maxwell Lightstone (posted 2023-02-01 17:02:56.033)

Can you sell a 25.75 mm drill bit to go with the SM1 tap? There isn't a good way to drill those holes right now, and we don't always want to use a lathe or a mill. Best regards, Maxwell Lightstone, MASc Mechanical Engineer

jdelia (posted 2023-02-03 03:04:51.0)

Thank you for your feedback. We unfortunately do not offer a drill bit for SM1 taps as we typically suggest milling out a pilot bore. I have contacted you directly to discuss your application and the possibility of offering this in the future.

Ahn Chang-Joon (posted 2023-01-14 23:41:30.687)

I found the tool Tapsm1 for SM1 Internal Thread here. However, no tools can be found for the SM1 External Thread. Can I purchase a tool for this? If possible, please reply to mertul@kit-fa.com

jdelia (posted 2023-01-17 04:30:58.0)

Thank you for contacting Thorlabs. I have reached out to you directly to discuss your application as well as methods that will allow you to cut external SM1 threads.

Enrico Renna (posted 2022-08-03 14:31:43.523)

Hello, would it be possible to buy a tap for SM18 thread ? We still have some issue to produce something that would function with the SM18RR. I couldn't find it on the webpage. Thank you very much!

jdelia (posted 2022-08-03 03:02:30.0)

Thank you for contacting Thorlabs. We will reach out to you directly regarding the possibility of quoting this out to you as a custom part.

Evgeny Rozemblit (posted 2021-12-20 06:15:41.993)

Hello, Need your help, do you know where I can find the GO-NOT GO gauge for 0.800"x36 thread?

jgreschler (posted 2021-12-23 10:46:46.0)

Thank you for reaching out to Thorlabs. I have reached out to you directly to discuss this further.

user (posted 2021-08-11 11:36:02.887)

It would be helpful if both bottoming and plug taps were offered for the SM05 and SM1 threads. The plug tap with the tapered threading doesn't work well on shallow depth holes.

cdolbashian (posted 2021-08-27 11:10:48.0)

Thank you for your suggestion! As we are hungry for feedback, we will look into the potential availability of this product as a stock option in the future.

user (posted 2021-04-12 03:34:23.157)

Hi, does Thorlabs sell M38 x 0.5 taps to accommodate the thread of the TTL-200 tube lens? I need to use that lens directly in a custom mount that is too small for the SM2 thread of the TTL200-A or the adapter.

YLohia (posted 2021-04-12 04:42:49.0)

Hello, custom taps can be requested by clicking on the "Request Quote" button above or by contacting your local Thorlabs Tech Support team (in your case, techsupport.se@thorlabs.com). We will discuss the possibility of offering this directly.

Frank Seifert (posted 2019-11-05 12:56:04.46)

Hi, it is great that Thorlabs offers a lot of the special taps (metric & imperial) to allow the customer to do their own adapters. However I'm missing the M15.5 x 0.5 tap for the SM15RR. Is it possible to purchase a M15.5 x 0.5 tap? Thanks!

llamb (posted 2019-11-06 09:49:47.0)

Thank you for your feedback! Custom taps can be requested by clicking the red "Request Quote" button above or emailing techsupport@thorlabs.com. I have reached out to you directly in this case to discuss this possibility.

Chris Betters (posted 2019-04-08 04:44:40.833)

Can you provide a tap for SMA threads (1/4-32)? Thanks Chris

YLohia (posted 2019-04-09 03:13:43.0)

Hello Chris, thank you for contacting Thorlabs. Custom taps can be requested by clicking the red "Request Quote" button above or emailing techsupport@thorlabs.com. We will reach out to discuss your requirements.

ghovorka (posted 2019-01-16 09:57:30.87)

It would be very useful to have a tap for M10.5x0.5 threads. It is a great size for mounting 10mm OD optics with the SM10RR retaining ring, but can't be used as easily for custom mounts without a tap available.

llamb (posted 2019-01-17 12:02:50.0)

Thank you for your feedback. I have added this idea into our internal product forum for further discussion. We can currently offer the M10.5 x 0.5 plug tap as a special item. I have reached out to you by email directly to discuss this special quote.

kitchinsf (posted 2018-10-24 16:12:02.7)

It would be helpful to offer a tap guide for ensuring perpendicular taps to the work surface. Since the SM05, SM1, and SM2 are not very common outside of Thor, a tap guide that includes these (at least the SM05 and SM1, SM2 is a bit too large) it would be very helpful. The table tap guide is very useful but is limited in its functionality.

llamb (posted 2018-11-05 10:48:40.0)

Thank you for your feedback. Tap guides like the TTT001(/M) typically need a flat reference plane like an optical table to fix to first. Most optomechanical parts with SM- threads are rounded or cylindrical, making it difficult to create a standardized tapping guide that fits to all components. We do not recommend hand-tapping these larger threads, but instead recommend using a type of drill press with a clutch for reversing the tap out of the threads.

wenzel.jakob (posted 2017-12-02 22:26:07.137)

I'm also interested in a tap for SM2 threads. Could you please provide me with a quote? Thank you.

tfrisch (posted 2017-12-05 01:54:35.0)

Hello, thank you for contacting Thorlabs. We will reach out to you with a quote for an SM2 tap.

pierrick.cheiney (posted 2017-06-21 13:57:27.263)

Hello, I cannot find a tap for the SM2 threads. Would it be possible to get one? Thanks,

tfrisch (posted 2017-06-27 11:19:36.0)

Hello, thank you for contacting Thorlabs. We will reach out to you with a quote.

user (posted 2017-03-15 08:46:56.48)

What tapping depth can each tap achieve?! This is key info that needs to be added to this webpage. Also of interest are: overall length, shank diameter.

tcampbell (posted 2017-03-23 01:55:10.0)

Response from Tim at Thorlabs: thank you for your feedback. We have added the thread depth and overall length of each tap to the webpage.

ludoangot (posted 2016-09-26 11:22:33.873)

Hello, it would be very useful and convenient if you could offer precision quality individual drill in the sizes required for the taps you sell.

jlow (posted 2016-09-29 10:55:03.0)

Response from Jeremy at Thorlabs: Thank you for your feedback, we will look into offering these.

johannes.hohlbein (posted 2016-06-27 09:37:37.37)

I would also be interested in a tap to match the SM2 lens tube system.

acaballero (posted 2016-05-10 10:03:46.95)

I could really use a tap to match the SM2 lens tube system.

besembeson (posted 2016-05-10 04:59:37.0)

Response from Bweh at Thorlabs USA: We can provide this to you. I will follow-up via email.

cbrideau (posted 2016-01-04 19:09:52.09)

An 8/32 imperial tap would be very useful to complement the M4 metric tap.

besembeson (posted 2016-01-05 08:26:53.0)

Response from Bweh at Thorlabs USA: We typically stock and provide mostly specialty taps that aren’t easily found as a convenience to those looking to integrate our components in their systems. As #8-32 is a very common thread, its tap can be easily found at local convenient stores or many other places online so we don't stock this.

ghall (posted 2015-11-24 11:50:45.943)

What style of taps are those? For through holes or bottoming? What class are they in terms of the tolerance/allowance? Specifically looking at the M11x0.5 tap.

besembeson (posted 2015-12-02 12:12:21.0)

Response from Bweh at Thorlabs USA: This is a 4 flute, straight flute hand tap with a 6H class fit.

cbrideau (posted 2014-01-13 14:58:47.927)

What would you recommend for drilling out a broken-off cap screw? The stainless steel of the screw is quite hard, so I'm not sure what would have a decent chance of actually boring through it...

jlow (posted 2014-01-14 02:59:05.0)

Response from Jeremy at Thorlabs: You can use a sharp carbide drill bit for this. You can use a sharp punch and a hammer to create a pilot first. The screw is susceptible to hardening, so once you begin the drill process, you should not stop until you are through the screw. Also, there should be a steady stream of some sort of cutting fluid on the drill bit so it does not get too hot. Your university machine shop or a local machine shop should have this cutting fluid readily available.

user (posted 2013-11-07 15:40:06.927)

Why not sell the die too?

jlow (posted 2013-11-11 10:54:51.0)

Response from Jeremy at Thorlabs: We do not stock the dies but we can provide it. Since you did not leave your contact info, can you contact us at techsupport@thorlabs.com to request a quote for the die you are looking? Thanks.

user (posted 2013-07-15 16:12:23.917)

Worst drill bit set ever!. Tried to drill through copper 1/4" copper and was not able to because the drills are just dull. I would not sell these at all.

cdaly (posted 2013-07-18 10:15:00.0)

Response from Chris at Thorlabs: Thank you for your feedback. It may be a matter of drill speed and feed. Please contact as at techsupport@thorlabs.com to discuss the conditions further.

nejbauer (posted 2013-03-19 07:25:05.243)

Hi, Do you have taps for imperial thread 8-32, which is very popular in your products? Best regards, Michal Nejbauer

tcohen (posted 2013-03-21 15:51:00.0)

Response from Tim at Thorlabs to Michal: Thank you for contacting us! We look to stock specialty taps that aren’t easily found as a convenience to those looking to integrate our components in their devices. #8-32 is a ubiquitous tap and you will most probably have luck finding it at your local hardware store.

jlow (posted 2012-07-31 15:26:00.0)

A response from Jeremy at Thorlabs: We will get in contact with you directly regarding a quote for this.

sfnagle (posted 2012-07-31 13:52:09.0)

I was wondering if you sell the die that goes with this tap size. I need to make external SM1 threads for a custom part in my set-up. Thanks.

gregory.futia (posted 2010-12-15 16:44:34.0)

Where do you get a .508" through drill to use with the SM05 tap, 83373?

Specialty Taps - Imperial

Zoom

Click to Enlarge
Diagram of a Standard Tap

Specialized Plug Taps
Covers SM05, SM1, and Most Other Threads Used by Thorlabs
Material: High-Speed Steel

These specialty taps aid in the integration of our optomechanical components into your custom-built devices. Our imperial taps selection includes many of the thread standards used by Thorlabs, including our SM05 (0.535"-40) and SM1 (1.035"-40) standards. Please see below for our metric taps.

Tapping Recommendations
To tap a hole, first machine a pilot bore, using the table below to find the recommended pilot bore diameter. The bore can be made using a drill bit or an end mill. For fine pitch threads, the pilot bore should be tightly toleranced because of the shallow thread depth; a reamer is also recommended in this case.

Next, secure the tap into a tap wrench, drill press, or lathe to create the threads. Lubricant or tapping fluid should be used to create the hole. If resistance is felt while tapping, carefully rotate the tap backwards to remove it, as broken taps are exceptionally difficult to remove.

If using these specialty taps for production, precision ring and plug gauges should be used to verify hole diameters. For additional details on threading and taps, please consult the Machinery's Handbook, available in many machine shops and bookstores.

Item #	Thread Type	Thread Depth (T)	Overall Length (L)	Shank Size (S)	Pilot Bore			Example Uses
Item #	Thread Type	Thread Depth (T)	Overall Length (L)	Shank Size (S)	Diameter	Tolerance^a	Imperial Drill Size^b	Example Uses
TAP080	0-80	0.31"	1.63"	0.141"	0.049"	+0.003"/-0.002"	-	Holes for Locking Setscrews
TAP256	2-56	0.44"	1.75"	0.141"	0.070"	±0.004"	#50 (0.0700")	Mounting Holes on Miniature Translation Stages
TAP440	4-40	0.56"	1.88"	0.141"	0.089"	±0.005"	#43 (0.0890")	Holes for Cage Rod Locking Setscrews
TAP680	6-80	0.69"	2.00"	0.141"	0.126"	±0.002"	1/8" (0.1250")	Holes for 6-80 Adjustment Screws
TAP832	8-32	0.75"	2.13"	0.168"	0.135"	+0.004"/-0.005"	#29 (0.1360")	Mounting Holes for 8-32 Screws
TAP316100	3/16"-100	0.88"	2.38"	0.194"	0.177"	+0.002"/-0.001"	#16 (0.1770")	Holes for 3/16"-100 Adjustment Screws
TAP1420	1/4"-20	1.00"	2.50"	0.255"	0.202"	+0.005"/-0.006"	#7 (0.2010")	Mounting Holes for 1/4"-20 Screws
TAP1480	1/4"-80	1.00"	2.50"	0.255"	0.238"	±0.002"	B (0.2380")	Holes for 1/4"-80 Adjustment Screws
TAP14100	1/4"-100	1.00"	2.50"	0.255"	0.240"	+0.002"/-0.001"	-	Holes for 1/4"-100 Adjustment Screws
TAP51632	5/16"-32	1.13"	2.72"	0.318"	0.282"	+0.004"/-0.003"	9/32" (0.2812")	Mounting Holes for 3/16"-100 Locking Bushings with 5/16"-32 External Threads
TAP3824	3/8"-24	1.25"	2.94"	0.381"	0.335"	±0.005"	Q (0.3340")	Mounting Hole for HAFC Fiber Bulkhead Adapter, 3/8" Standard Tapped Holes
TAP3840	3/8"-40	1.25"	2.94"	0.381"	0.348"	±0.003"	S (0.3480")	Mounting Holes for 1/4"-80 Locking Bushings with 3/8"-40 External Threads
TAP38100	3/8"-100	1.25"	2.94"	0.381"	0.365"	+0.002"/-0.001"	-	Holes for 3/8"-100 Fine Adjustment Screws
TAPSM05	0.535"-40 (SM05 Standard)	1.66"	3.59"	0.429"	0.511"	±0.003"	-	Internal Threads on Ø1/2" Lens Tubes
TAPRMS	0.800"-36 (RMS Standard)	2.00"	4.47"	0.652"	0.773"	+0.004"/-0.003"	-	Mounts for RMS-Threaded Objectives
TAPCM	1.00"-32 (C-Mount Standard)	2.50"	5.13"	0.800"	0.970"	±0.004"	-	Internal Threads on C-Mount Extension Tubes, Mounts for Machine Vision Camera Lenses
TAPSM1	1.035"-40 (SM1 Standard)	1.50"	4.00"	0.896"	1.011"	±0.003"	-	Internal Threads on Ø1" Lens Tubes

For fine pitch threads, it is especially important to tightly tolerance the pilot bore because of the shallow thread depth.
Item numbers with drill sizes listed are within the provided tolerance for each item. For item numbers without a corresponding standard drill size, please refer solely to the pilot bore diameter column, as drill bits in that size are not available.

Based on your currency / country selection, your order will ship from Newton, New Jersey

+1 Qty Docs Part Number - Imperial Price Available

TAP080 English (Imperial) Tap, 0-80 Thread

$23.76

Taps and Drill Bit Kit

Features

Threading Specifications

Specialty Taps - Imperial

Specialty Taps - Metric

Drill Bit Kit

Universal Tap Wrench

Table Tapping Guide

Repairing a Damaged Tapped Hole