Description
Drillco 25A448B 3-3/4-8 HSS Bottoming Tap – 2500 Series is engineered for heavy-duty threading in large-diameter applications such as oil fields, gas exploration equipment, and power generation plants. Featuring an 8-pitch configuration, this bottoming tap is ideal for creating threads at the bottom of blind holes with precision and durability. Made from premium grade high-speed steel (HSS) and treated with a black oxide finish, it delivers extended tool life and excellent wear resistance. Its spiral flute design efficiently evacuates chips, preventing thread damage, while the reduced neck offers improved clearance in deep hole applications. Proudly manufactured in the USA, this tap is designed for professionals requiring reliable, high-performance threading tools.
Features:
- Large-diameter 3-3/4-8 bottoming tap for specialized industrial use
- Premium grade high-speed steel (HSS) construction for durability and long life
- Spiral flutes designed to pull chips out of the hole and protect threads
- Black oxide surface treatment for enhanced wear resistance
- Reduced neck for better clearance in deep holes
Benefits:
- Allows precise threading at the bottom of blind holes
- Minimizes chip clogging and reduces risk of thread damage
- Extends tool life with high-quality materials and surface treatment
- Designed for heavy-duty applications in oil, gas, and power industries
Technical Specifications:
- Model: 25A448B
- Thread Size: 3-3/4-8
- Tap Type: Bottoming 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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