3/4" Metal Lubricator 765-VC or it can also rotate

or it can also rotate the knurled knob on the drain to manually drain the water

Kit includes various air compressor tools and accessories: safety couplers fitting and plug with a 1/4" basic flow size and an air flow of 40 SCFM

spring retainer

This cam and groove coupler with female adapter conforms to military specification 27487

Threads: ⅜-24

3/4" Metal Lubricator 765-VC or it can also rotateThis 3 4" NPT lubricator with metal bowl is the drip style, which allows precise settings for trouble free protection. The adjusting knob can be removed in order to prevent tampering and the sight glass dome allows observation for instant drip rate adjustment. The 10 ounce metal bowl may be filled without shutting down line pressure, delivering oil at an air flow as low as 2 SCFM. Maximum pressure of 200 PSI and 142 SCFM.