3/8 x 3/8 Tube/Hose Push to Connect Brass Bulkhead Union 3/4-24

Dixon 1/4 Brass Bulkhead Union Compression Fitting

GE-NPT - Male stud connector - Male NPT thread / EO 24° cone end

Calaméo - Earl's Performance Plumbing Catalog

3/8 x 3/8 Tube/Hose Push to Connect Brass Bulkhead Union 3/4-24

Water Heater Supply Lines - Ace Hardware

Brass 3/8 Push-In Bulkhead Tube Union, B-31182

Calaméo - Prevost General Catalog INTER

SAE Thread 3/8-24 UNF Fit Tube OD 3/16 - 1/4 NPT Male Brass

Bulkhead Connector Push Connect Fitting - 5 Pack

1874X6X6 by Danfoss, Quick Connect Air Brake Adapter

Push-to-Connect Fittings, Pipe & Hose Fittings, Fittings

Other Pneumatics Bullseye Industrial Sales

3/8 x 3/8 Tube/Hose Push to Connect Brass Bulkhead Union 3/4-24

Brass 3/8 UNF Bulkhead Brake Union