



| Nominal Diameter D |
L 1 | L 2 | D 2 | ▢ |
| NPS 1/8 x 27 | 59 | 15 | 8 | 6.3 |
| NPS 1/4 x 18 | 67 | 19 | 10 | 8 |
| NPS 3/8 x 18 | 75 | 21 | 12.5 | 10 |
| NPS 1/2 x 14 | 87 | 26 | 16 | 12.5 |
| NPS 3/4 x 14 | 96 | 28 | 20 | 16 |
| NPS 1″ x 11.1/2 | 109 | 33 | 25 | 20 |
| NPS 1.1/4 x 11.1/2 | 119 | 36 | 31.5 | 25 |
| NPS 1.1/2 x 11.1/2 | 125 | 37 | 35.5 | 28 |
| NPS 2″ x 11.1/2 | 140 | 41 | 40 | 31.5 |
SOMTA Tools was founded in 1954, specializes in the design and manufacture of standard and custom tools for the industrial markets. Product categories can be summarized as drills, cutters, reamers, threading tools and toolbits, which are made in a wide range of sizes, using various materials (HSS and Solid Carbide) and PVD surface coatings to extend wear life.
SOMTA’s vision of “To manufacture and supply superior cutting tools, driven by a culture of service excellence, to global and domestic markets” is supported by ISO accreditation which was first achieved in 1991 and still remains in place today.
NPS HSS hand taps by SOMTA are precision-engineered tools designed to cut and repair straight pipe threads that comply with National Pipe thread standards. Unlike tapered pipe taps, NPS hand taps produce parallel threads, making them suitable for applications where sealing is achieved using gaskets, O-rings, or mechanical fittings rather than thread interference.
Manufactured from high-quality high-speed steel (HSS) or cobalt materials, SOMTA HSS NPS hand taps deliver excellent durability, wear resistance, and cutting performance across various materials, including steel, stainless steel, aluminum, brass, and cast iron.