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
#4-40 H2 3FL TAP Taper 85032 Call for Quote
#4-48 H1 2FL STI SPPT TAP Default 31195 Call for Quote
#4-48 H1 3FL STI TAP Plug 31027 Call for Quote
#4-48 H1 3FL STI TAP Bottom 31028 Call for Quote
#4-48 H1 3FL TAP Plug 85037 Call for Quote
#4-48 H1 3FL TAP Bottom 85038 Call for Quote
#4-48 H1 3FL TAP Taper 85036 Call for Quote
#4-48 H2 2FL STI SPPT TAP Default 31196 Call for Quote
#4-48 H2 3FL STI TAP Plug 31029 Call for Quote
#4-48 H2 3FL STI TAP Bottom 31030 Call for Quote
#4-48 H2 3FL TAP Plug 85041 Call for Quote
#4-48 H2 3FL TAP Bottom 85042 Call for Quote
#4-48 H2 3FL TAP Taper 85040 Call for Quote
#5-40 H1 2FL STI SPPT TAP Default 31197 Call for Quote
#5-40 H1 3FL STI TAP Plug 31031 Call for Quote
#5-40 H1 3FL STI TAP Bottom 31032 Call for Quote
#5-40 H1 3FL TAP Plug 85045 Call for Quote
#5-40 H1 3FL TAP Bottom 85046 Call for Quote
#5-40 H1 3FL TAP Taper 85044 Call for Quote
#5-40 H2 2FL STI SPPT TAP Default 31198 Call for Quote
#5-40 H2 3FL STI TAP Plug 31033 Call for Quote
#5-40 H2 3FL STI TAP Bottom 31034 Call for Quote
#5-40 H2 3FL TAP Plug 85049 Call for Quote
#5-40 H2 3FL TAP Bottom 85050 Call for Quote
#5-40 H2 3FL TAP Taper 85048 Call for Quote
#5-44 H2 3FL TAP Plug 85053 Call for Quote
#5-44 H2 3FL TAP Bottom 85054 Call for Quote
#5-44 H2 3FL TAP Taper 85052 Call for Quote
#6-32 H1 3FL TAP Plug 85057 Call for Quote
#6-32 H1 3FL TAP Bottom 85058 Call for Quote
#6-32 H1 3FL TAP Taper 85056 Call for Quote
#6-32 H2 2FL STI SPPT TAP Default 31199 Call for Quote
#6-32 H2 3FL STI TAP Plug 31035 Call for Quote
#6-32 H2 3FL STI TAP Bottom 31036 Call for Quote
#6-32 H2 3FL TAP Plug 85061 Call for Quote
#6-32 H2 3FL TAP Bottom 85062 Call for Quote
#6-32 H2 3FL TAP Taper 85060 Call for Quote
#6-32 H3 2FL STI SPPT TAP Default 31200 Call for Quote
#6-32 H3 3FL STI TAP Plug 31037 Call for Quote
#6-32 H3 3FL STI TAP Bottom 31038 Call for Quote
#6-32 H3 3FL TAP Plug 85065 Call for Quote
#6-32 H3 3FL TAP Bottom 85066 Call for Quote
#6-32 H3 3FL TAP Taper 85064 Call for Quote
#6-32 H3 4FL LH TAP Plug 31317 Call for Quote
#6-32 H3 4FL LH TAP Bottom 31318 Call for Quote
#6-32 H3 4FL LH TAP Taper 31316 Call for Quote
#6-40 H1 2FL STI SPPT TAP Default 31201 Call for Quote
#6-40 H1 3FL STI TAP Plug 31039 Call for Quote
#6-40 H1 3FL STI TAP Bottom 31040 Call for Quote
#6-40 H1 3FL TAP Plug 85069 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