Spears® SCH 40/STD PVC fitting designs combine years of proven experience with computer generated stress analysis to yield the optimum physical structure and performance for each fitting. Material reinforcement is uniformly placed in stress concentration areas for substantially improved pressure handling capability. Resulting products are subjected to numerous verification tests to assure the very best PVC fittings available. Spears® 435-040, Standard, Adapter Fitting/Connector, 4 in Nominal, Socket x FNPT End Style, 3-23/32 in Length, SCH 40 Schedule, Molded Method of Manufacture, PVC, White, 5-1/32 in H Dimensions, Domestic/Import: Domestic