PBC Linear VRD4 037.000 Drilled Linear Rail, V Guide, Size 4, 37 in Length, 0.437 in Width, Carbon Steel 812G63 Flange Fitting Connection NPT Female Flange Fitting Connection NPT Female Pipe Size (A) 1 1 2 For Flange Pipe Size (B) 3 Flanged Connection Surface (B) Raised Flange OD 7 1 2" For Bolt Diameter 5 8" Bolt Hole Diameter 3 4" Number of Bolt Holes 4 Bolt Circle Diameter 6" Pressure Class 150 Material Steel Maximum Pressure @ Temperature 285 psi @ 72° F Maximum Steam Pressure @ Temperature 230 psi @ 300° F Certificate Form Digital Certificate Type Material Certificate with Traceable Lot Number Connects To Pipe Flange Construction One Piece For Fitting Material Iron Too much torque