Back Home / Pipe & Tube Fittings / Steel Fittings / STEEL FITTING CAP 3/8″ SAE STEEL FITTING CAP 3/8″ SAE SKU: X4129X6 Categories: Pipe & Tube Fittings, Steel Fittings Seal-lok steel fittings. Very effective in wide range of applications where higher pressures, vibration and impulse are prevalent. Meet or exceed SAE J1453 and ISO 8434-3. Sealing method: o ring For use with 3/8″ o.d. tubing. Thread size is 11/16″-16. Case Quantity: 1 Log In For Pricing