Reiff Nestor 47053 Bsp Pipe Tap 1/4-19 Bottoming 4-flute Hss

Product Description

The REIFF NESTOR 47053 is a 1/4-19 G(BSP) bottoming pipe tap designed for threading British Standard Pipe (BSP) connections in metal workpieces. Built from high speed steel (HSS) with a bright uncoated finish, it features 4 straight flutes and a right-hand thread direction. The bottoming chamfer allows threading close to the bottom of a blind hole, making it well suited for tight-clearance fittings. With an overall length of 2-7/16 inches, a thread length of 1-1/16 inches, and a shank diameter of 0.9843 inches, this tap is sized for use in manual or machine tapping operations by machinists and pipefitters working with BSP-standard fittings.

This tap is used wherever G(BSP) pipe threads are required, including hydraulic fittings, pneumatic manifolds, fluid transfer systems, and plumbing assemblies that conform to British Standard Pipe specifications. It is a practical choice for shops producing or repairing equipment imported from regions that use BSP threading standards, including European and Asian-manufactured machinery. The Series 122P designation indicates a standard production series tap intended for general-purpose threading in steel, cast iron, aluminum, and similar materials.

Key Features

• 1/4-19 G(BSP) thread form for British Standard Pipe applications
• Bottoming chamfer enables threading to the bottom of blind holes
• 4 straight flutes provide chip control in through and blind hole applications
• High speed steel construction offers durability across a range of workpiece materials
• Bright uncoated finish suitable for general-purpose use without special coatings
• Right-hand thread direction, standard for most pipe fitting applications

Compatibility

Designed for use in workpieces requiring 1/4-19 G(BSP) internal pipe threads. Compatible with standard tap wrenches and machine tapping setups that accept the 7/16-inch square drive on the shank.

Installation Notes

Installation is performed by machinists or pipefitters using a calibrated tap wrench or tapping machine. Power down all equipment and secure the workpiece before beginning any tapping operation. Use appropriate cutting fluid for the workpiece material to extend tap life and improve thread quality. Follow applicable shop safety procedures and verify hole diameter against the recommended tap drill size for 1/4-19 BSP before threading.