Amazon.com: KOOTANS Forged Brass Reducing Hex Nipple, 1/4'' NPT Male x 1/8'' NPT Male Thread Adapter Brass Pipe Fitting Connector Couplings (Pack of 4) : Industrial & Scientific
LTWFITTING 1/8 in. O.D. Comp x 1/8 in. MIP Brass Compression Adapter Fitting (5-Pack) HF682205 - The Home Depot
Pneumatic Plumbing Brass Pipe Fitting Male/Female Thread G1/8 G1/4 G3/8 G1/2 Tee Type Copper Fittings Water Oil Gas Adapter - AliExpress
Brass Pipe Fitting Assortment in Metal Durham Tray — Red Boar Chain & Fastener Questions Call 435-319-8344
British Thread Brass Adaptor 1/4" BSPP (G) Female - 1/4" NPT Male - 120 BSPP (G) Female to NPT Male - Pipe Adapter Male to Female - British Thread Adapters - Brass Fittings