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
3/4-16 H3 4FL LH TAP Plug 31392 Call for Quote
3/4-16 H3 4FL LH TAP Bottom 31393 Call for Quote
3/4-16 H3 4FL LH TAP Taper 31391 Call for Quote
3/4-16 +.003 4FL TAP Plug 36685 Call for Quote
3/4-16 +.003 4FL TAP Bottom 36686 Call for Quote
3/4-16 +.003 4FL TAP Taper 36684 Call for Quote
3/4-16 +.005 4FL TAP Plug 36691 Call for Quote
3/4-16 +.005 4FL TAP Bottom 36692 Call for Quote
3/4-16 +.005 4FL TAP Taper 36690 Call for Quote
3/4-16 H3 4FL STI TAP Plug 31127 Call for Quote
3/4-16 H3 4FL STI TAP Bottom 31128 Call for Quote
3/4-16 H4 4FL STI TAP Plug 31129 Call for Quote
3/4-16 H4 4FL STI TAP Bottom 31130 Call for Quote
3/4-16 H8 4FL TAP Plug 36688 Call for Quote
3/4-16 H8 4FL TAP Bottom 36689 Call for Quote
3/4-16 H8 4FL TAP Taper 36687 Call for Quote
3/4-18 H3 4FL TAP Plug 36141 Call for Quote
3/4-18 H3 4FL TAP Bottom 36142 Call for Quote
3/4-18 H3 4FL TAP Taper 36140 Call for Quote
3/4-20 H3 6FL TAP Plug 31262 Call for Quote
3/4-20 H3 6FL TAP Bottom 31263 Call for Quote
3/4-20 H3 6FL TAP Taper 31261 Call for Quote
3/4-20 LH H3 6FL TAP Plug 36694 Call for Quote
3/4-20 LH H3 6FL TAP Bottom 36695 Call for Quote
3/4-20 LH H3 6FL TAP Taper 36693 Call for Quote
3/4-24 H3 6FL TAP Plug 36145 Call for Quote
3/4-24 H3 6FL TAP Bottom 36146 Call for Quote
3/4-24 H3 6FL TAP Taper 36144 Call for Quote
3/4-27 H3 6FL TAP Plug 36149 Call for Quote
3/4-27 H3 6FL TAP Bottom 36150 Call for Quote
3/4-27 H3 6FL TAP Taper 36148 Call for Quote
3/4-32 H3 6FL TAP Plug 36153 Call for Quote
3/4-32 H3 6FL TAP Bottom 36154 Call for Quote
3/4-32 H3 6FL TAP Taper 36152 Call for Quote
3/4-40 H3 6FL TAP Plug 36697 Call for Quote
3/4-40 H3 6FL TAP Bottom 36698 Call for Quote
3/4-40 H3 6FL TAP Taper 36696 Call for Quote
3/4-40 AMO H2 6FL Default 36699 Call for Quote
13/16-10 H4 4FL TAP Plug 36701 Call for Quote
13/16-10 H4 4FL TAP Bottom 36702 Call for Quote
13/16-10 H4 4FL TAP Taper 36700 Call for Quote
13/16-12 H4 4FL TAP Plug 36704 Call for Quote
13/16-12 H4 4FL TAP Bottom 36705 Call for Quote
13/16-12 H4 4FL TAP Taper 36703 Call for Quote
13/16-16 H3 4FL TAP Plug 36157 Call for Quote
13/16-16 H3 4FL TAP Bottom 36158 Call for Quote
13/16-16 H3 4FL TAP Taper 36156 Call for Quote
13/16-18 H3 4FL TAP Plug 36161 Call for Quote
13/16-18 H3 4FL TAP Bottom 36162 Call for Quote
13/16-18 H3 4FL TAP Taper 36160 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