3/8 Brass Hose Barb Nipple X 1/4 Male NPT Threads for CO2, Gas, Air PACK OF 4

Barb is 3/8". Base thread size is 1/4" Male NPT threads. Fits common plumbing, gas, and air fittings.

CGA Fittings for Gas Ratermann Manufacturing Inc

Hose Barb Fittings for sale

Star Sales USA

ME540 to CGA870 H M Industrial Oxygen Tank Transfill Adapter 40 Stainless Hose

PlumbShop Brass Hose Barb Adapter, 1/4-in MIP x 3/8-in ID Hose

Homebrew Fittings - Brass, Stainless Steel, Food Grade Plastic

Star Sales USA

MAACFLOW Stainless Steel 1/8 Male NPT to 3/8 Hose ID

Pneumatic Plumbing Brass Pipe Fitting Male/Female Thread 1/8 1/4