Flange Bolts Basic Material Steel Material Grade Alloy Steel Fastener Finish Plain Dia/Thread Size 3/8 In.-16 Fastener Length 1 3/4 in Fastener Thread Direction Right Hand Fastener Thread Type UNC (Coarse) Fastener Thread Style Partially Threaded Fastener Industry Standards ASTM A574 IFI-115 Thread Length 1 1/4 in Head Height 3/8 in Head Width 3/8 in Flange Dia 9/16 in Proof Load 140 000 psi Tensile Strength 170 000 psi Rockwell Hardness HRC37 Package Quantity 25