Drillco 3-1/2-8 HSS Bottoming Tap (25A432B)

Description

Drillco 25A432B 3-1/2-8 HSS Bottoming Tap is specially designed for creating full threads to the bottom of blind holes in heavy-duty applications such as oil field, gas exploration, and power generation equipment. With an 8-pitch configuration, this bottoming tap is ideal for large diameter threading up to 4″ in diameter, ensuring precise and complete thread formation even at the hole’s deepest point. Made from premium grade High-Speed Steel (HSS), it offers excellent durability and wear resistance. The spiral flute design efficiently evacuates chips, preventing thread damage. A black oxide finish provides enhanced corrosion resistance and extends tool life. Its reduced neck improves clearance in deep holes, and it is proudly manufactured in the USA for consistent quality and reliability.

Features:

• 3-1/2″-8 bottoming tap for threading to the bottom of blind holes
• 8-pitch design suitable for oil field, gas exploration, and power generation use
• Constructed from premium grade High-Speed Steel for strength and longevity
• Spiral flutes designed to pull chips out of the hole, protecting threads
• Black oxide finish for corrosion resistance and extended tool life
• Reduced neck for better clearance in deep-hole applications

Benefits:

• Provides full threads at the bottom of blind holes for secure fastening
• Efficient chip evacuation reduces risk of thread damage
• Enhanced durability and corrosion resistance extend tool life
• Improved deep-hole threading with reduced neck design

Technical Specifications:

• Model: 25A432B
• Thread Size: 3-1/2″-8
• Type: Bottoming Tap
• Material: Premium Grade High-Speed Steel (HSS)
• Flute Type: Spiral
• Finish: Black Oxide
• Neck: Reduced for clearance in deep holes
• Country of Origin: USA