How to identify an unknown thread

How to identify an unknown thread You will need a clean fitting, a vernier calliper, a thread-pitch gauge and a reliable identification chart. 1. Make the component safe…

Metric, BSP and NPT—what is the difference?

Metric, BSP and NPT: what is the difference? These thread families may overlap in apparent diameter, but they use different dimensions and profiles. Metric threads Metric threads are…

How hydraulic fittings seal

How hydraulic fittings seal Not every hydraulic fitting seals on its thread. Understanding the sealing point prevents overtightening and incorrect use of tape or compound. Common sealing arrangements…

Metric, BSP and NPT Thread Guide

A straightforward guide to measuring and distinguishing common industrial thread forms.