Machine tap DIN 5156 type B HSS-E for G pipe threads (BSPP) – Koronet

The DIN 5156 type B machine tap from Koronet is a precision tool designed for making internal cylindrical pipe threads type G (BSPP – British Standard Pipe Parallel). The BSPP (G) thread is a cylindrical (parallel) thread, which means that it does not seal the joint on the thread itself – the tightness is usually achieved through a gasket / O-ring / face seal depending on the design of the connector.

The tool is made of high-speed cobalt steel HSS-E (HSSE), which ensures good wear resistance and stable operation in workshop and production conditions.

G-thread (BSPP) – for pipe connections with sealing

The tap makes a cylindrical pipe thread (BSPP) This type of thread:

• is used to guide and press fasteners,

• is commonly found in piping solutions and fittings,

• requires a structural seal (e.g. gasket, O-ring), because the thread has a fixed diameter (it is cylindrical) and does not seal itself by wedging the coils together.

Type B – Through hole geometry

Compliance with DIN 5156 / B indicates type B, i.e. a cross-cut geometry designed for threading through holes, where smooth tool entry and stable guidance during threading are important.

HSS-E steel (HSSE) – stability and durability

The tap is made of HSS-E high-speed steel with the addition of cobalt, which is characterized by:

• increased resistance to loads and operating temperature,

• good wear resistance,

• stable operation with repetitive threading.

Application

The tap is designed to make internal G threads (BSPP) in accordance with DIN 5156, in applications where the pipe connection is made with an off-thread seal (depending on the design of the connector).