Somta Series 581 – 1/4 NPS HSS Parallel Pipe Tap Bottom

The Somta Series 581 Parallel Pipe Tap is manufactured from premium high speed steel for producing accurate NPS parallel pipe threads in through or blind holes. Designed for both hand and machine tapping applications, this bottoming tap delivers reliable thread cutting performance and precise thread formation across industrial, engineering, and maintenance applications.

Manufactured to ISO 2284 and ANSI B94.9-1979 standards, the tap features straight flutes for stable cutting action and efficient threading performance. The NPS thread form ensures compatibility with National Pipe Straight thread applications and fittings.

Key Features & Benefits

• Somta Series 581 parallel pipe tap
• Part Number: 5810643
• Tap Type: Bottoming Tap
• Thread Size: 1/4 NPS
• Nominal Diameter: 13.571mm
• Threads Per Inch (TPI): 18
• Overall Length (l1): 67mm
• Thread Length (l2): 19mm
• Shank Diameter (d1): 10mm
• Square Size (a): 8mm
• Number of Flutes: 4
• Manufactured from premium HSS
• Suitable for hand or machine tapping
• Straight flute design for stable threading performance
• Designed for through and blind hole applications
• Right-hand cutting direction
• NPS parallel thread form
• Manufactured to ISO 2284 and ANSI B94.9-1979 standards

Technical Specifications

• Brand: Somta
• Series: 581
• Tool Type: Parallel Pipe Tap
• Tap Style: Bottoming
• Thread Size: 1/4 NPS
• Nominal Diameter: 13.571mm
• TPI: 18
• Overall Length: 67mm
• Thread Length: 19mm
• Shank Diameter: 10mm
• Square Size: 8mm
• Number of Flutes: 4
• Material: HSS
• Thread Standard: NPS
• Standards: ISO 2284 / ANSI B94.9-1979
• Code: 5810643

Somta cutting tools are trusted worldwide for their precision engineering, durability, and dependable threading performance across industrial engineering, maintenance, and fabrication applications.

Please ensure tooling specifications are suitable for your machine and application prior to purchase.