Amazon.com: CEKER 1/4" NPT Push to Connect Fittings Air Fittings 6mm Tube Od Air Line Fittings Pneumatic Fittings Push in Connectors Air Hose Quick Connect Fittings 5Packs : Industrial & Scientific
Hi-Flo Quick Connect Air Fittings | Plug & Coupler Kit - 1/4" NPT (Set of
1/4 Male Female Air Hose Fittings Self Locking Quick Connect Air Coupler Fitting | eBay
Type D Air Hose Quick Connect Adapter 1/4" NPT Male Fitting Plug Coupler | eBay
Brass 1/4 Inch NPT Male Air Hose Quick Connect Adapter,Air Coupler Plug Kit,Air Compressor Fittings 10Pcs (Male NPT) - Walmart.com