6L-G-FR4-TB4-4S-F3
316L Stainless Steel, FITOK FR Series Metal Gasket Face Seal Fitting, FR Gland to Short Fractional Tube Butt Weld, 1/4 in. FR × 1/4×0.035 in. Tube Butt Weld, 0.6 in. (15.2 mm) Long, FITOK FC-03 Ultra-High Purity Process Specification