Pipe Coupling Bolt Hole Diameter 5/8 in Bolt Material Alloy Steel Finish/Coating Epoxy Coated Fitting Nominal Pipe Size 4 in Fitting Type Flanged For Movement Type Vibration Material Grade 12L14 Maximum Operating Pressure 150 psi Offset Distance Not Applicable Overall Length 24 in Pipe Fitting Material Steel Seal Material Nitrile Seal Type Included Standard Basic Fitting Shape Coupling For Pipe Schedule 250 Standards ASTM A307 ASTM A512 ASTM A53 ASTM A536 AWWA C219 NSF 61