Dason Stainless is a domestic manufacturer of screwed and socket weld fittings. Dason 150 lb. screwed fittings are used for standard pressure service. General dimensions conform to MSS-SP-114. Pipe threads conform to ASME B1.20.1. Fittings are inventoried in 304, 304L, 304/304L, 316, 316L, 316/316L, Alloy 20, and Monel. We now have Canadian Registration Numbers (CRN).