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
3/8-24 H3 4FL LH TAP Taper 31355 Call for Quote
3/8-24 +.003 4FL TAP Plug 36484 Call for Quote
3/8-24 +.003 4FL TAP Bottom 36485 Call for Quote
3/8-24 +.003 4FL TAP Taper 36483 Call for Quote
3/8-24 +.005 4FL TAP Plug 36488 Call for Quote
3/8-24 +.005 4FL TAP Bottom 36489 Call for Quote
3/8-24 +.005 4FL TAP Taper 36487 Call for Quote
3/8-24 H2 3FL STI SPPT TAP Default 31224 Call for Quote
3/8-24 H3 3FL STI SPPT TAP Default 31225 Call for Quote
3/8-24 H3 4FL 6 OAL TAP Plug 36492 Call for Quote
3/8-24 H3 4FL 6 OAL TAP Bottom 36493 Call for Quote
3/8-24 H3 4FL 6 OAL TAP Taper 36491 Call for Quote
3/8-24 H3 4FL CARBIDE TAP Plug 38258 Call for Quote
3/8-24 H3 4FL CARBIDE TAP Bottom 38259 Call for Quote
3/8-24 H3 4FL CARBIDE TAP Taper 38257 Call for Quote
3/8-24 H2 4FL STI TAP Plug 31087 Call for Quote
3/8-24 H2 4FL STI TAP Bottom 31088 Call for Quote
3/8-24 H3 4FL STI TAP Plug 31089 Call for Quote
3/8-24 H3 4FL STI TAP Bottom 31090 Call for Quote
3/8-24 H3 3FL 6 OAL SMSH SP PL Default 36494 Call for Quote
3/8-24 H3 3FL CARBIDE SPPT Default 38238 Call for Quote
3/8-24 +.005 3FL SPPT TAP Default 36490 Call for Quote
3/8-24 +.003 3FL SPPT TAP Default 36486 Call for Quote
3/8-27 H3 4FL TAP Plug 36041 Call for Quote
3/8-27 H3 4FL TAP Bottom 36042 Call for Quote
3/8-27 H3 4FL TAP Taper 36040 Call for Quote
3/8-32 H3 4FL TAP Plug 31244 Call for Quote
3/8-32 H3 4FL TAP Bottom 31245 Call for Quote
3/8-32 H3 4FL TAP Taper 31243 Call for Quote
3/8-32 H3 3FL SPPT TAP Default 36499 Call for Quote
3/8-40 H2 4FL TAP Plug 36045 Call for Quote
3/8-40 H2 4FL TAP Bottom 36046 Call for Quote
3/8-40 H2 4FL TAP Taper 36044 Call for Quote
3/8-48 H2 4FL TAP Plug 36501 Call for Quote
3/8-48 H2 4FL TAP Bottom 36502 Call for Quote
3/8-48 H2 4FL TAP Taper 36500 Call for Quote
7/16-12 LH 2G ACME TANDEM 4FL Default 37090 Call for Quote
7/16-12 RH 2G ACME TANDEM 4FL Default 37091 Call for Quote
7/16-14 H3 4FL LH TAP Plug 31359 Call for Quote
7/16-14 H3 4FL LH TAP Bottom 31360 Call for Quote
7/16-14 H3 4FL LH TAP Taper 31358 Call for Quote
7/16-14 H3 4FL TAP Plug 36049 Call for Quote
7/16-14 H3 4FL TAP Bottom 36050 Call for Quote
7/16-14 H3 4FL TAP Taper 36048 Call for Quote
7/16-14 +.005 4FL TAP Plug 36504 Call for Quote
7/16-14 +.005 4FL TAP Bottom 36505 Call for Quote
7/16-14 +.005 4FL TAP Taper 36503 Call for Quote
7/16-14 +.010 4FL TAP Plug 36508 Call for Quote
7/16-14 +.010 4FL TAP Bottom 36509 Call for Quote
7/16-14 +.010 4FL TAP Taper 36507 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