SS-8-VCR-4 | Swagelok | 316 S/Steel Vcr Face Seal Fitting, 1/2 In., Male Nut. Swagelok SS-8-VCR-4. Is Swagelok SS-8-VCR-4 not the part you are wanting?. 316 S/Steel Vcr Face Seal Fitting. This is a surplus unused, part.