Description
Drillco 25A356T 2-7/8-8 HSS Taper Tap – 2500 Series is a heavy-duty threading tool engineered for large-diameter applications such as oil field operations, gas exploration equipment, and power generation plants. With an 8-pitch configuration and a robust design, this taper tap ensures precise and consistent thread cutting in challenging industrial environments. The premium grade high-speed steel (HSS) construction delivers outstanding durability, while its black oxide surface treatment enhances wear resistance. Built for reliability and efficiency, this USA-made taper tap is an essential choice for professionals requiring large-diameter threading solutions.
Features:
- Large-diameter 2-7/8-8 taper tap for heavy-duty industrial threading
- Made from premium grade high-speed steel (HSS) for extended tool life
- Available in bottoming geometry for versatile threading needs
- Spiral flutes designed to pull chips out of the hole, preventing damage to threads
- Black oxide finish for improved wear resistance and longevity
- Reduced neck design for better clearance in deeper holes
Benefits:
- Delivers precise and clean threads in large-diameter applications
- Prevents chip clogging and minimizes thread damage
- Extends tool life with high-quality HSS and black oxide coating
- Suitable for demanding oil, gas, and power generation environments
Technical Specifications:
- Model: 25A356T
- Thread Size: 2-7/8-8
- Tap Type: Taper Tap
- Material: Premium Grade High-Speed Steel (HSS)
- Surface Treatment: Black Oxide
- Flute Type: Spiral
- Series: 2500
- Country of Origin: USA






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