PROTO Torque Adapter, Drive Size 3/8 in, Size 7/16 in, Overall Length 2 3/4 in, 0 °, 12-Point Box End - 1Q812|J5114 - Grainger
Canister Gas Convertor 1" 20 UNF Adapter Lindal Valve Canister to 7/16" 28UNF Green Propane Tank Welding Torch MAPP Gas Cans|Welding Torches| - AliExpress
US Conec MTP®/MPO-16 Black Fiber Optic Adapter/Coupler with Flange, Key Up to Down - FS