DIN 2353 & ISO 8434-1 Material Specifications - Plating/surface finish adheres to ASTM B633 - Fitting material: Carbon Steel (bar stock for straights, press-forged elbows and tees, stamped cutting rings) - O-ring material: NBR 82-85 (Viton 90 available upon request Thread/Fitting Standards - BSPP (parallel) port — ISO 1179-1 - BSPP (parallel) elastomeric seal — ISO 1179-2 - BSPP (parallel) adjustable stud — ISO 1179-3 - BSPT (tapered) — ISO 7-1 / DIN 10226-1 - Metric tube — ISO 8434-1 / ISO 8434-4 / DIN 2353 - Metric adjustable stud — ISO 9974 / DIN 3852-1 - Metric tapered — DIN 158 - NPT — ANSI B 1.20.3 - ORB — ISO 11926-1 / SAE J 1926-1