There are 4 standards for just those threads and they are.
Air line coupler types.
Brass npt male coupler the husky 1 4 in.
The main things to consider are the fitting type and the thread size.
There are 5 common pneumatic quick connect interchange profiles in use in the usa today and one relic odd ball.
Bspp british standard pipe parallel.
It is the quick release end that there are two common types off.
Further confusing matters some styles carry multiple names.
For example automotive t style and tru flate all refer to the same fitting.
Air coupler identification cart couplers are shown actual size style1 2 width3 8 width1 4 width.
The other is the shorter german sometimes called export fitting which will work with german italian swiss and american fittings.
The chart below shows how to identify which connector style you have.
Npt male coupler is used the husky 1 4 in.
Quick connect air couplers look similar but they come in at least 10 different styles that often don t play well together glen.
High flow milton v.
Highflowpro couplers and plugs.
As you can see industrial style couplers have two striped going across the fitting whereas the automotive style only has one.
There are two main types of air compressor couplers.
Air coupler identification chart.
Npt male coupler is used to connect components to an air compressor.
One is the longer british fitting and was the most common available until recently.
Nps national pipe straight.
Npt national pipe taper.
Bspt british standard pipe taper.
Common fixing types include bsp pcl and 3 8 npt.
Standard or safety coupler industrial profile 1 4 body size with 1 4 male npt threads.
Nps is very rarely if ever used for air fittings so its just the other three that we have to worry about.
Variable angle swivel fitting.
It is crafted with heat treated brass for strength and it features a sleeve guard that reduces the potential of accidental disconnects and works to protect the coupler sleeve.
Couplers come as standard hose comes out instantly when sleeve is pulled or safety couplers allows the air to bleed out of the hose before the hose can disconnect example order.
They are the iso 6150b or industrial profile milton m the truflate profile milton t the aro 210 profile milton a and the european 7 2mm.