Tank and Cylinder Couplings Tank and Cylinder Couplings For more information please contact us. Download Our CatalogAISI 1020 Carbon Steel Couplings SAE x SAE Full SAE x NPT Full SAE Half – Shoulder SAE Half – Bevel NPTF Half – Shoulder NPTF Half – Bevel BSPP x BSPP Full BSPP Half – Shoulder BSPP Half – Bevel SAE x Socketweld Full 316L SS Couplings 30–sae x npt couplings 316L 31–sae x sae full couplings 316L 32–sae x socket weld full couplings 316L 33–npt x socket weld full couplings 316L 35–sae half couplings 316L Flat Bottom 35–sae half couplings 316L Beveled Bottom 38–npt half couplings 316L 39–npt x npt full couplings 316L