Description
HSS Bottom Tap UNC 1″ x 8 – Somta Series 541
The SOMTA 5412543 – 1″ x 8 UNC HSS Bottom Tap is a heavy-duty threading tool designed for cutting full-depth threads in blind holes. Manufactured from high-speed steel (HSS), this bottoming tap features a short chamfer that allows threading close to the hole base—making it ideal for maintenance, production, and repair tasks requiring high-strength UNC threads. It conforms to Unified National Coarse (UNC) thread standards and delivers consistent performance in steel, cast iron, aluminum, and other metals.
Key Features Benefits
- Bottoming Chamfer – Short 1–2 thread lead for threading to the bottom of blind holes.
- Unified National Coarse (UNC) – Standard 1″ diameter with 8 TPI for compatibility with UNC fasteners.
- Straight Flute Design – Supports smooth cutting and effective chip evacuation in hand or machine use.
- High-Speed Steel (HSS) – Provides excellent durability, cutting edge retention, and heat resistance.
- Bright Finish – Reduces friction and helps produce clean, accurate threads.
- Versatile Use – Suitable for manual tapping with wrenches or powered operations with tapping heads.
Technical Specifications
- Part No: 5412543
- Thread Size: 1″ x 8 TPI
- Thread Standard: UNC – Unified National Coarse
- Tap Type: Bottoming (short chamfer for blind holes)
- Flute Style: Straight flute
- Cutting Direction: Right-hand
- Material Finish: High-Speed Steel (HSS), Bright
- Standard: ANSI / Unified Inch
Why Choose the SOMTA 5412543 UNC Bottom Tap?
- Perfect for Blind Hole Tapping – Bottoming lead enables full thread formation to the hole base.
- Durable Construction – HSS material extends tool life even under high-load conditions.
- Reliable Thread Form – Meets UNC thread standards for universal fit and compatibility.
- Ideal for Industrial Use – Trusted by professionals for tooling, repair, and fabrication tasks.
The SOMTA 5412543 tap provides dependable threading for 1″ UNC applications in blind holes. Built from high-speed steel and engineered to deliver precision and repeatability, it’s a must-have tool for heavy-duty threading jobs.
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