Hss plug tap details
Drillco 2-1/4-8 HSS Plug Tap (25A316P)
Drillco 25A316P 2-1/4-8 HSS Plug Tap is designed for heavy-duty threading applications commonly found in oil fields, gas exploration equipment, and power generation plants. This 8-pitch plug tap, suitable for larger diameters up to 4 inches, features a reduced neck for improved clearance in deep holes. Constructed from premium grade high-speed steel (HSS) and treated with a black oxide surface for extended durability, it ensures long-lasting performance. The spiral point design effectively ejects chips through the bottom of the hole, minimizing clogging and enhancing thread quality. This tap is proudly made in the USA to meet stringent quality standards.
Ideal for large diameter threading in demanding industrial environments
Reduced neck design offers better clearance in deep holes
Made from premium grade HSS for superior tool life
Black oxide surface treatment increases wear resistance and durability
Spiral point efficiently ejects chips to prevent clogging
Available in plug geometry for versatile threading applications
Reliable and durable threading performance in harsh environments
Extended tool life due to high-grade materials and protective coatings
Reduced risk of chip clogging for smoother operation
Improved accessibility in deep holes thanks to reduced neck
Technical Specifications:
Material: Premium Grade High-Speed Steel (HSS)
Finish: Black Oxide Surface Treatment
Shank: Standard square
Application: Heavy-duty threading in oil field, gas exploration, and power generation
Special Features: Reduced neck for enhanced clearance in deep holes
Country of Origin: USA
Product identification
- Brand: Drillco
- Model / MPN: 25A316P





