Osg 1658002008 Bspp Pipe Tap 1/4-19 3 Flutes Hss

Product Description

The OSG 1658002008 is a British Standard Pipe Parallel (BSPP) hand tap designed to cut 1/4-19 internal pipe threads in a range of metals. Part of OSG Series 16580, it features 3 flutes ground from high-speed steel (HSS) with a V (bright) finish. The overall length is 3.94 inches with a 0.748 inch thread length, a 0.56 inch shank diameter, and a 0.42 inch square drive. Machinists, pipefitters, and maintenance technicians use this tap when threading ports, fittings, and manifold bodies to BSPP specification. Right-hand thread direction, no coolant-through.

This tap is suited for threading 1/4-19 BSPP parallel pipe threads in carbon steel, stainless steel, aluminum, and hardened steel workpieces. Typical applications include hydraulic and pneumatic manifolds, fluid fittings, instrumentation ports, and any component requiring a leak-resistant BSPP parallel thread form. The BSPP standard is common in European and British-origin equipment, making this tap essential when servicing imported machinery or manufacturing to metric pipe standards.

Key Features

• 1/4-19 BSPP thread form for parallel British Standard Pipe threads
• 3-flute geometry for efficient chip evacuation in through and blind holes
• High-speed steel construction for durability across carbon steel, stainless steel, aluminum, and hardened steel
• V (bright) finish — no coating, suitable for general-purpose tapping
• 0.42 inch square drive shank compatible with standard tap wrenches
• Right-hand thread direction, Series 16580

Compatibility

Designed to cut 1/4-19 BSPP parallel pipe threads in carbon steel, stainless steel, aluminum, and hardened steel. Compatible with standard tap wrenches and drill presses accepting a 0.56 inch shank diameter.

Installation Notes

This tap is typically used by machinists, pipefitters, or maintenance technicians on a drill press, mill, or with a hand tap wrench. Always drill the correct BSPP tap drill size before tapping and apply cutting fluid appropriate to the workpiece material. Secure the workpiece fully before applying torque to avoid tap breakage, especially in stainless steel or hardened steel. Inspect the tap for wear or chipping before each use and replace if cutting edges are degraded.