Hertel G837530-S Pipe Tap 1/4-18 Nptf 4 Flutes Hss

Product Description

The HERTEL G837530-S is a standard pipe tap designed to cut internal NPTF (National Pipe Taper Fuel) threads in a variety of materials. Built from high speed steel (HSS) with a bright, uncoated finish, this tap delivers consistent thread formation across ferrous and non-ferrous workpieces. It cuts a 1/4-18 NPTF thread profile with a thread length of 1-1/16 inches and a 4-flute configuration that promotes chip evacuation and cutting stability. The short projection tap style makes it suited for controlled tapping operations in production and maintenance environments. Pipefitters, machinists, and plumbing tradespeople use this tap when preparing pipe thread connections in fittings, manifolds, and ported components.

This tap is used in applications where a pressure-tight NPTF pipe thread is required. The 1/4-18 thread size is a common standard found in hydraulic fittings, pneumatic components, plumbing valves, and instrumentation ports. The 4-flute design supports hand tapping and machine tapping in through-hole and moderate blind-hole conditions. The short projection style positions the cutting flutes closer to the shank, which is appropriate for tapping in tight clearance situations or where rigidity is preferred. The shank diameter measures 0.5625 inches and the square drive size is 0.4210 inches, compatible with standard tap wrenches and holders in that range.

Key Features

• 1/4-18 NPTF thread standard for pressure-tight pipe thread connections
• High speed steel construction for durability across a range of workpiece materials
• 4-flute geometry supports chip evacuation and clean thread formation
• Short projection tap style provides added rigidity in confined tapping setups
• Bright, uncoated finish suitable for general-purpose tapping applications
• Thread length of 1-1/16 inches provides adequate engagement depth for standard pipe fittings

Compatibility

Designed as an OEM-style replacement or direct-use pipe tap for applications requiring 1/4-18 NPTF internal threads in metalworking, plumbing, and hydraulic or pneumatic component assembly.

Installation Notes

This tap is installed by machinists or trade professionals using a standard tap wrench or machine tapping setup. Always drill the correct tap drill size for 1/4-18 NPTF prior to tapping and ensure the workpiece is securely fixtured. Apply appropriate cutting fluid to extend tap life and improve thread quality. Follow standard safe tooling practices and power down any machine before securing or removing the tap from the holder.