Somta Somta Series 541 - HSS Straight Flute Short Hand Bottom (Finishing) Tap UNC 3/8" x 16 TPI

HSS Bottom Tap UNC 3/8’ x 16 – Somta Series 541

The SOMTA 5410953 – 3/8’ x 16 UNC HSS Bottom Tap is a high-precision threading tool designed for cutting full-depth internal threads in blind holes. Manufactured from high-speed steel (HSS), it features a short lead chamfer that allows threads to be cut close to the bottom of the hole. Conforming to the Unified National Coarse (UNC) thread standard, this bottom tap is ideal for accurate thread production in steel, cast iron, aluminum, and other general-purpose materials.

• Bottoming Chamfer (1-2 Threads) – Designed for threading to full depth in blind holes.
• Unified National Coarse (UNC) – 3/8’ diameter with 16 TPI for compatibility with standard UNC fasteners.
• Straight Flute Geometry – Enables clean chip flow and steady cutting in both hand and machine use.
• High-Speed Steel (HSS) – Provides high wear resistance, toughness, and long service life.
• Bright Finish – Reduces friction and enhances surface quality of cut threads.
• Versatile Tapping – Suitable for use in tap wrenches, tapping arms, or machine tapping applications.

• Part No: 5410953
• Thread Size: 3/8’ x 16 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

• Precision Threading – Ensures accurate thread geometry for UNC applications.
• Bottom Tap for Blind Holes – Allows maximum thread engagement near the hole base.
• Reliable HSS Durability – Performs under demanding conditions and repeated use.
• Trusted for Industrial Use – Ideal for workshops, maintenance, and fabrication environments.

The SOMTA 5410953 bottom tap offers professional-grade threading for 3/8’ UNC applications. Built for long life and precision, it’s the go-to choice for creating strong threads in blind hole setups across a variety of metals.