Osg 1312802 Nptf Pipe Tap 1/4-18 4 Flute Hss

Product Description

The OSG 1312802 is a standard NPTF pipe tap designed to cut internal tapered pipe threads in metal workpieces. Built from high-speed steel with an elektraLUBE finish, it produces 1/4-18 NPTF threads with a 1-1/16-inch thread length. The four-flute geometry promotes chip evacuation and consistent thread form across a range of materials. This tap is a shop staple for machinists, pipefitters, and HVAC or plumbing technicians who need to create leak-resistant tapered pipe thread connections in ported fittings, manifolds, valve bodies, and hydraulic or pneumatic components.

This tap is suited for production and maintenance applications where a reliable NPTF tapered thread is required. Typical uses include tapping ports in cast iron, steel, aluminum, and similar metals for pipe thread connections in fluid power systems, refrigerant manifolds, gas line fittings, and plumbing assemblies. The NPTF profile ensures a dry-seal fit when properly tapped, reducing reliance on thread sealant in many installations.

Key Features

• 1/4-18 NPTF thread size for standard tapered pipe thread connections
• High-speed steel construction for durability across ferrous and non-ferrous materials
• elektraLUBE finish reduces friction and extends tool life during cutting
• Four-flute design promotes chip clearance and thread accuracy
• 1-1/16-inch thread length accommodates typical port depth requirements
• Series 118 standard tap profile compatible with common tap holders and T-handle wrenches

Compatibility

Designed as an OEM-style replacement or standard tooling option for applications requiring 1/4-18 NPTF tapered pipe threads in metal components.

Installation Notes

This tap is installed by machinists or trade professionals using a T-handle tap wrench, tapping head, or compatible machine tap holder. Always use an appropriate cutting fluid or tapping compound for the workpiece material. Start the tap squarely to the drilled hole to avoid cross-threading and ensure proper thread form. Inspect the tapped thread with a go/no-go gauge when a dry-seal NPTF fit is required.