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
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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
7/8-20 H3 6FL TAP Bottom 31269 Call for Quote
7/8-20 H3 6FL TAP Taper 31267 Call for Quote
7/8-24 H3 6FL TAP Plug 36719 Call for Quote
7/8-24 H3 6FL TAP Bottom 36720 Call for Quote
7/8-24 H3 6FL TAP Taper 36718 Call for Quote
7/8-27 H3 6FL TAP Plug 36722 Call for Quote
7/8-27 H3 6FL TAP Bottom 36723 Call for Quote
7/8-27 H3 6FL TAP Taper 36721 Call for Quote
7/8-32 H3 6FL TAP Plug 36725 Call for Quote
7/8-32 H3 6FL TAP Bottom 36726 Call for Quote
7/8-32 H3 6FL TAP Taper 36724 Call for Quote
15/16-12 H4 4FL TAP Plug 36181 Call for Quote
15/16-12 H4 4FL TAP Bottom 36182 Call for Quote
15/16-12 H4 4FL TAP Taper 36180 Call for Quote
15/16-14 H4 4FL TAP Plug 36728 Call for Quote
15/16-14 H4 4FL TAP Bottom 36729 Call for Quote
15/16-14 H4 4FL TAP Taper 36727 Call for Quote
15/16-16 H3 4FL TAP Plug 36185 Call for Quote
15/16-16 H3 4FL TAP Bottom 36186 Call for Quote
15/16-16 H3 4FL TAP Taper 36184 Call for Quote
15/16-18 H3 6FL TAP Plug 36189 Call for Quote
15/16-18 H3 6FL TAP Bottom 36190 Call for Quote
15/16-18 H3 6FL TAP Taper 36188 Call for Quote
15/16-20 H3 6FL TAP Plug 31271 Call for Quote
15/16-20 H3 6FL TAP Bottom 31272 Call for Quote
15/16-20 H3 6FL TAP Taper 31270 Call for Quote
15/16-32 H3 6FL TAP Plug 36731 Call for Quote
15/16-32 H3 6FL TAP Bottom 36732 Call for Quote
15/16-32 H3 6FL TAP Taper 36730 Call for Quote
1-5 LH 2G ACME FINISHER 4FL Default 37126 Call for Quote
1-5 LH ACME RH SPIRAL TANDEM 4FL Default 37314 Call for Quote
1-5 RH 2G ACME FINISHER 4FL Default 37004 Call for Quote
1-5 RH 2G ACME ROUGHER 4FL Default 37104 Call for Quote
1-5 RH ACME LH SPIRAL TANDEM 4FL Default 37304 Call for Quote
1-5 LH 2G ACME RGHR 4FL TAP Default 37125 Call for Quote
1-5 LH 2G ACME TNDM 4FL TAP Default 37076 Call for Quote
1-5 RH 2G ACME TNDM 4FL TAP Default 37077 Call for Quote
1-8 +.005 4FL TAP Plug 36740 Call for Quote
1-8 +.005 4FL TAP Bottom 36741 Call for Quote
1-8 +.005 4FL TAP Taper 36739 Call for Quote
1-8 +.010 4FL TAP Plug 36744 Call for Quote
1-8 +.010 4FL TAP Bottom 36745 Call for Quote
1-8 +.010 4FL TAP Taper 36743 Call for Quote
1-8 H3 4FL STI TAP Plug 31139 Call for Quote
1-8 H3 4FL STI TAP Bottom 31140 Call for Quote
1-8 H4 4FL STI TAP Plug 31141 Call for Quote
1-8 H4 4FL STI TAP Bottom 31142 Call for Quote
1-8 LH 2G ACME FINISHER 4FL Default 37128 Call for Quote
1-8 LH 2G ACME ROUGHER 4FL Default 37127 Call for Quote
1-8 RH 2G ACME FINISHER 4FL Default 37106 Call for Quote
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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