Osg 1310402 Pipe Tap 3/8-18 Npt 4 Flute Hss

Product Description

The OSG 1310402 is a standard pipe tap designed to cut 3/8-18 NPT internal pipe threads in metal workpieces. It features four flutes ground from high-speed steel (HSS) and carries an elektraLUBE finish that reduces friction and extends tool life during tapping operations. The 1-1/16-inch thread length provides adequate engagement depth for standard NPT fittings used in plumbing, HVAC, and gas piping applications. Plumbers, pipefitters, HVAC technicians, and machinists use this tap to create leak-resistant tapered pipe thread connections in ferrous and non-ferrous materials.

This tap is suited for threading pipe bosses, manifolds, fittings, and other components that require a 3/8-18 NPT threaded port. It is appropriate for both shop fabrication and field service work where threaded pipe connections must be made or restored. The tapered NPT thread form produces a mechanical seal when properly assembled with a mating threaded fitting, making it standard in water, gas, and refrigerant line assemblies across residential and light commercial systems.

Key Features

• 3/8-18 NPT tapered pipe thread form for leak-resistant mechanical sealing
• High-speed steel construction for durability in ferrous and non-ferrous materials
• elektraLUBE finish reduces cutting friction and extends tap life
• Four-flute design provides chip clearance and thread accuracy
• 1-1/16-inch thread length suits standard NPT fitting engagement depths
• Series 108 standard tap geometry for consistent thread form

Compatibility

Designed as an OEM-style threading tool for any application requiring a 3/8-18 NPT internal pipe thread in metal components.

Installation Notes

This tap is installed using a tap wrench or machine tapping setup by a qualified plumber, pipefitter, or machinist. Always drill the correct tap drill size for 3/8-18 NPT before tapping, and apply cutting fluid throughout the operation to protect the tool and workpiece. Back the tap out periodically to clear chips and prevent binding or breakage. Verify thread form with a go/no-go gauge before assembling fittings under pressure, and follow applicable plumbing and gas codes such as the IPC and IFGC for all threaded pipe connections.