1.1/4 X 1 Socket Weld Reducer Coupling 3K 316L - 1012-0252 A182 316/L Stainless Steel Dimensions to ANSI B16.11/BS3799 Sizes 1/4" to 2" NPT Threaded to ANSI B2.1 BSPT Threaded to ISO 7/1 Pressure / Temperature ratings according to BS 3799 Pressure rating performance will vary depending on temperature.