HSS Bottom Tap UNC ½″ x 13 – Somta Series 541

The SOMTA 5411273 – ½″ x 13 UNC HSS Bottom Tap is a precision tool designed for cutting full-depth coarse threads in blind holes. With a bottoming chamfer (1–2 threads), it allows threading close to the base of the hole. Manufactured from high-speed steel (HSS), this tap is engineered for durability and consistent thread quality in steel, aluminum, cast iron, and non-ferrous materials. It conforms to Unified National Coarse (UNC) thread standards, making it a reliable choice for general-purpose and structural threading tasks.

Key Features Benefits

• Bottoming Chamfer – Enables full thread formation in blind holes with minimal clearance.
• UNC Thread Standard – ½″ x 13 TPI for standard coarse-threaded connections.
• Straight Flute Geometry – Delivers controlled chip flow and clean cutting action.
• High-Speed Steel (HSS) – Ensures tool strength, wear resistance, and extended life.
• Bright Finish – Reduces friction and improves thread surface finish.
• Hand or Machine Use – Suitable for manual tapping or powered equipment.

Technical Specifications

• Part No: 5411273
• Thread Size: ½″ x 13 TPI
• Thread Standard: UNC – Unified National Coarse
• Tap Type: Bottoming
• Chamfer: 1–2 threads
• Flute Style: Straight flute
• Cutting Direction: Right-hand
• Material: High-Speed Steel (HSS)
• Finish: Bright
• Standard: ANSI / Unified Inch

Why Choose the SOMTA 5411273 UNC Bottom Tap?

• Ideal for Blind Hole Tapping – Short chamfer design ensures maximum thread depth.
• Durable HSS Build – Withstands demanding applications and materials.
• Accurate Coarse Threading – Meets ANSI UNC standards for dependable fit.
• Versatile Usage – Perfect for workshops, structural assembly, and general engineering use.

The SOMTA 5411273 bottom tap provides reliable, full-depth threading in blind holes for standard ½″ UNC applications. Its robust design and clean-cutting performance make it a go-to tool for professionals in manufacturing, maintenance, and fabrication.