Nipple, Pipe Schedule 40, Welded, Pipe Weld Type Continuous Weld, Pipe Connection Type Threaded on Both Ends, Black Steel, Pipe Size - Nominal 3 in, Overall Pipe Length 3.5 in, Pipe Thread Type MNPT x MNPT, Max. Pressure 300 psi @ 150 Degrees F, Max. Steam Pressure 150 psi WSP @ 360 Degrees F, Wall Thickness 13/64 in, Inside Dia. 3 1/16 in, Outside Dia. 3 1/2 in, Standards ASTM A-53 Type F, ASTM A733, Grade A