Air line compression fittings can be used in vent lines for 2.5 Ton and 5 Ton axle Breathers, as well as adapters for the T-600 and Axletech Lockers.
Pneumatic fitting, straight, 1/4 tube, press-in, 1/4 NPT male Studica Canada - Robotics, Automation Technology for Education and Industry
NPT 1/4 x 3/8 male high pressure hose fitting
1/4 Tube To 1/8 NPT Male Straight Compression Fitting – N75 MotorSports
This single brass compression fitting from PlumbShop is made for 1/4 inch tube, offering both durability and reliability. Constructed from solid brass
PlumbShop Brass Compression Fitting, 1/4-in OD x 1/4-in MIP, 1-pk
Pl 90 Degree Hydraulic Elbow Bite Type Tube Fitting Compression Copper Pipe Fittings - China Pneumatic Fitting, Pneumatic Brass Fitting
Female NPT to Male BSPT Connector, Brass nut, HT washer, SS Cir-clip
LET-LOK® Compression Tube Fittings
Adapter Guide
Hose Factory Male Brass Connector Compression Fitting
Reliance Brass Connector Fitting 1/4 Npt - 3/8 tube