Somta Somta Series 541 - HSS Straight Flute Short Hand Bottom (Finishing) Tap UNC 5/16" x 18 TPI

The SOMTA 5410793 – 5/16’ UNC HSS Bottom Tap delivers full-thread depth for blind-hole tapping applications. Designed for use in assembly, maintenance, and manufacturing, it adheres to UNC (Unified National Coarse) standards. Its bottoming chamfer allows it to thread as close as possible to the bottom of a hole with minimal lead-in.

• Bottoming Chamfer – Enables threading close to hole bottom with minimal chamfer.
• UNC Thread Form – 5/16’ coarse-thread standard for general mechanical use.
• Straight Flute – Clean chip removal and reliable thread quality.
• HSS Material – Long life and resistance to heat and wear.
• Bright Finish – Supports smooth threading and lower friction.
• Manual or Powered Use – Taps effectively by hand or machine.

• Part No: 5410793
• Thread Size: 5/16’ UNC
• Thread Standard: UNC – Unified National Coarse
• Tap Type: Bottoming
• Flute Style: Straight flute
• Cutting Direction: Right-hand
• Material Finish: High-Speed Steel (HSS), Bright
• Standard: ANSI B1.1 / ISO Equivalent

• Close Bottom Threading – Threads nearly the entire depth of blind holes.
• Tough and Consistent – Built for durability across common workshop materials.
• Used in Automotive and Industrial Settings – Trusted by machinists and repair professionals alike.

The SOMTA 5410793 is the ideal tool for bottoming applications requiring accuracy and thread completeness in tight spaces.