Taps & Dies

Popular Special Taps (Inches)

WESTport stocks one of the industry's largest inventories of Popular Special Inch Taps. Custom manufactured to your blueprint or sample with fast turnaround for production, maintenance, and OEM applications.

Why WESTport?

  • Custom-ground to your exact specs
  • All thread standards: UNC, Metric, NPT, ACME, API
  • HSS, Cobalt, Powder Metal, Carbide options
  • Made in USA — 30+ years of precision manufacturing
  • Same-day quoting on standard requests
  • Matched tap & die sets available
Skip to product information
1 of 1

Call for Quote

To order, contact us with the part number and your desired quantity.

Size
Style
Chamfer

Part #:31187

Features

  • One of the industry's largest inventories of tap blanks
  • Fast turnaround on custom special taps
  • Manufactured from customer blueprints or samples
  • Precision-ground thread geometry
  • High-Speed Steel (HSS), cobalt, and powdered metal options
  • Standard and modified inch thread sizes
  • Premium wear-resistant coatings available
  • CNC and manual machining applications
  • Prototype through production quantities
More Details View full details

Available Sizes & Part Numbers

SizeStyleChamferSKUPrice
#12-28 H1 4FL TAP Plug 85125 Call for Quote
#12-28 H1 4FL TAP Bottom 85126 Call for Quote
#12-28 H1 4FL TAP Taper 85124 Call for Quote
#12-28 H3 4FL TAP Plug 85129 Call for Quote
#12-28 H3 4FL TAP Bottom 85130 Call for Quote
#12-28 H3 4FL TAP Taper 85128 Call for Quote
1/16-27 NPT 4FL TAP Default 62121 Call for Quote
1/16-27 NPT LH TAP Default 31306 Call for Quote
1/8-27 NPT 4FL TAP Default 62122 Call for Quote
1/8-27 NPT LH TAP Default 31307 Call for Quote
1/8-27 NPT 4FL SMALL SHANK TAP Default 62007 Call for Quote
1/8-28 H3 4FL TAP Plug 36351 Call for Quote
1/8-28 H3 4FL TAP Bottom 36352 Call for Quote
1/8-28 H3 4FL TAP Taper 36350 Call for Quote
1/8-28 55 DEGREE MOD BSPP RH Default 31537 Call for Quote
1/8-28 55 DEGREE MOD BSPT RH Default 31528 Call for Quote
1/4-16 LH 2G ACME TANDEM 4FL Default 37086 Call for Quote
1/4-16 RH 2G ACME TANDEM 4FL Default 37087 Call for Quote
1/4-18 NPT 4FL TAP Default 62123 Call for Quote
1/4-18 NPT LH TAP Default 31308 Call for Quote
1/4-18 NPSF 4FL 6 OAL TAP Default 36358 Call for Quote
1/4-18 NPSI 4FL TAP Default 36359 Call for Quote
1/4-18 NPTF 15º SPIRAL 4FL TAP Default 36353 Call for Quote
1/4-18 NPTF 4FL 6 OAL TAP Default 36355 Call for Quote
1/4-18 NPTF 4FL CARBIDE TAP Default 38018 Call for Quote
1/4-18 NPTF 4FL SAE SHORT TAP Default 36354 Call for Quote
1/4-18 NPTF 5FL 6 OAL INTR TAP Default 36356 Call for Quote
1/4-18 NPTF 8 OAL 4FL TAP Default 36357 Call for Quote
1/4-19 55 DEGREE MOD BSPP RH Default 31538 Call for Quote
1/4-19 55 DEGREE MOD BSPT RH Default 31529 Call for Quote
1/4-20 H2 3FL STI TAP Plug 31067 Call for Quote
1/4-20 H2 3FL STI TAP Bottom 31068 Call for Quote
1/4-20 H3 3FL STI TAP Plug 31069 Call for Quote
1/4-20 H3 3FL STI TAP Bottom 31070 Call for Quote
1/4-20 H3 4FL LH TAP Plug 31341 Call for Quote
1/4-20 H3 4FL LH TAP Bottom 31342 Call for Quote
1/4-20 H3 4FL LH TAP Taper 31340 Call for Quote
1/4-20 +.003 2FL SPPT Default 36364 Call for Quote
1/4-20 +.003 4FL TAP Plug 36362 Call for Quote
1/4-20 +.003 4FL TAP Bottom 36363 Call for Quote
1/4-20 +.003 4FL TAP Taper 36361 Call for Quote
1/4-20 +.005 2FL SPPT Default 36368 Call for Quote
1/4-20 +.005 4FL TAP Plug 36366 Call for Quote
1/4-20 +.005 4FL TAP Bottom 36367 Call for Quote
1/4-20 +.005 4FL TAP Taper 36365 Call for Quote
1/4-20 +.010 4FL TAP Plug 36370 Call for Quote
1/4-20 +.010 4FL TAP Bottom 36371 Call for Quote
1/4-20 +.010 4FL TAP Taper 36369 Call for Quote
1/4-20 H2 3FL STI SPPT TAP Default 31214 Call for Quote
1/4-20 H3 2FL 6 OAL SMSH SP Default 36375 Call for Quote
« Previous 1 3 4 5 6 7 30 Next »

Product Details

WESTport's Popular Special Taps – Inches are designed to provide manufacturers with quick access to many of the most frequently requested non-standard inch thread sizes while maintaining the flexibility to produce fully custom tooling when required. Unlike standard catalog taps, these special taps are available in popular inch sizes, pitches, and configurations that are commonly requested by machine shops, OEMs, maintenance departments, repair facilities, and production manufacturers. WESTport maintains one of the industry's largest inventories of tap and die blanks, allowing for exceptionally fast turnaround on custom specials manufactured from your blueprint or sample.

Every WESTport Popular Special Inch Tap is precision manufactured using premium High-Speed Steel (HSS), cobalt, powdered metal, or other high-performance tool materials selected to match the application. Precision grinding produces highly accurate thread geometry, smooth cutting performance, and excellent dimensional consistency throughout the life of the tool. Whether your application requires a modified pitch, special diameter, custom chamfer, unique thread length, oversize limits, or another engineering modification, WESTport's manufacturing capabilities allow us to produce tooling tailored specifically to your requirements.

These taps are widely used across aerospace, automotive, defense, heavy equipment, hydraulic systems, energy, medical manufacturing, industrial machinery, and general machining operations. By maintaining a large inventory of tap blanks and utilizing efficient manufacturing processes, WESTport helps customers reduce downtime caused by long lead times while ensuring the precision required for demanding thread-cutting applications.

Whether you require a single replacement tap, prototype tooling, or production quantities, WESTport works directly with customers to provide dependable thread-cutting solutions backed by technical expertise and responsive customer support. Since 1989, WESTport has supplied precision quality assurance products and custom manufacturing solutions to customers throughout North America and worldwide.

Benefits

  • Faster delivery than typical custom tooling
  • Accurate, repeatable internal threads
  • Excellent dimensional consistency
  • Reduced production downtime
  • Long tool life
  • Custom-engineered solutions for difficult applications
  • Reliable performance across a wide variety of materials
  • Supported by experienced technical assistance

Typical Applications

  • Aerospace manufacturing
  • Automotive components
  • Industrial machinery
  • Hydraulic equipment
  • Oil and gas equipment
  • Tool and die manufacturing
  • Maintenance and repair operations
  • OEM production
  • Precision machine shops
  • General industrial manufacturing

Technical Information

WESTport Popular Special Inch Taps are manufactured for many of the most commonly requested non-standard inch thread sizes and pitches. When a standard configuration is not available, WESTport can manufacture custom taps directly from customer blueprints or sample parts. This capability allows manufacturers to obtain precision tooling for both legacy equipment and newly engineered components while minimizing production delays.

Why Choose WESTport?

Since 1989, WESTport has been a trusted supplier of precision thread gages, metrology equipment, hardness testing products, calibration services, and custom threading solutions. Our extensive inventory of tap blanks, precision manufacturing capabilities, and commitment to customer service enable us to deliver high-quality custom inch taps with exceptional turnaround times. Whether your requirement involves a single prototype or a large production order, WESTport provides the precision, reliability, and technical expertise manufacturers have depended on for more than 35 years.

Have a Custom or Special Application?

Need a tap or die ground to a non-standard spec, print, or unique thread form? Submit a custom quote request and our engineering team will review it.

Request a Custom Quote