Hertel G837570T-S Pipe Tap 1/8-27 Nptf 4 Flute Hss Tin

Product Description

The HERTEL G837570T-S is a standard pipe tap designed to cut 1/8-27 NPTF threads in ferrous and non-ferrous materials. Manufactured from high speed steel with a titanium nitride (TiN) coating, this short projection tap delivers extended tool life and reduced friction in demanding threading applications. The TiN finish increases surface hardness and wear resistance, making the G837570T-S well suited for production environments and field service work alike. With 4 flutes and a 0.75-inch thread length, it produces clean, pressure-tight NPTF threads in a single pass. Machinists, pipefitters, and HVAC technicians install this tap using a standard tap handle or machine setup.

This tap is used to create National Pipe Taper Fuel (NPTF) threads, which are designed for pressure-tight connections without sealing compounds. Common applications include threading ports in pipe fittings, manifolds, hydraulic blocks, and equipment housings in plumbing, HVAC, and industrial service. The 1/8-27 thread size is one of the most frequently specified pipe thread sizes in trade work, appearing in gas valves, pressure gauges, refrigeration fittings, and fluid control components. The short projection design suits both hand tapping and machine tapping setups where clearance is limited.

Key Features

• 1/8-27 NPTF thread form for pressure-tight pipe connections
• High speed steel construction for durability in a wide range of materials
• TiN coating reduces friction and extends tool life compared to uncoated HSS
• 4-flute design for efficient chip removal and clean thread formation
• Short projection (0.241 inches) suits confined-space and machine tapping applications
• 0.3125-inch shank diameter compatible with standard tap holders and chucks

Compatibility

Designed as an OEM-style replacement or standard tooling selection for applications requiring 1/8-27 NPTF threaded connections in pipe, fittings, and equipment housings.

Installation Notes

This tap is installed by a machinist or qualified tradesperson using a properly sized tap wrench or machine tap holder matched to the 0.3125-inch shank diameter. Always use an appropriate cutting fluid or tapping compound for the workpiece material, and ensure the tap is aligned perpendicular to the work surface before beginning. Clear chips frequently, especially in blind-hole applications, to prevent tap breakage. Follow applicable safety standards for rotating tooling and secure workpieces firmly before threading.