Compression Fitting Nut, Application Chemical, Fitting Material Stainless Steel, Material Grade 316, Maximum Operating Pressure 10, 300 psi, Maximum Operating Temperature 1, 200 Degrees F, Overall Length 1/2 in, Thread Size 7/16 In. -20, Specific Fitting Shape Nut, System of Measurement Imperial, Compatible Tube Outer Diameter 1/4 in, Compatible Fitting Brands Let-Lok, Swagelok, Series Let-Lok, Standards ASME, ASTM-A, CE, MIL-F-18866, SAE, Compatible Tube Hardness Not Applicable