Brass Pipe Fitting Adapter, 1/8 PT Male x 1/4 PT Female Coupling 2pcs - Walmart.com
Amazon.com: Viair 90001 1/8" Female BSP - 1/4" Male NPT Adaptor - 2 Piece : Tools & Home Improvement
Amazon.com: CERRXIAN Right Angle 1/4 Male to 1/8 Female Adapter, 90 Degree 6.35mm 3 Pole Male to 3.5mm Female Stereo TRS Headphone Audio Converter Connector(2-Pack) : Electronics
1/4" Male to 1/8" Female NPT Reducer - UniversalAir.com
1/4" NPT Male x 3/8" NPT Female Swivel Straight 1404-04-06 Adapter | NPT Female Swivel to NPT Male - Straight | NPT to NPT | Hydraulic Adapters & Fittings | Hydraulics | www.surpluscenter.com
MFC02-01 (Brass, 1/4" Female x 1/8" Male NPT) - Advanced Technology Products