5/16 -18 x 1 3/4 A307 Grade A Square Head Machine Bolt Low Carbon Steel Zinc Plated Pk 650

PRODUCT SPECIFICATIONS Part #: 0000-115462 Fastener Type: Square Head Machine Bolt Size Description: 5/16 -18 x 1 3/4 Diameter/Nominal Size: 5/16 Length: 1 3/4 Thread Pitch: 18 Thread Direction: Right System of Measurement: Inch Grade: A (2) Material: Low Carbon Steel Finish: Zinc Plated Head Type: Square Drive Type: External Square Standards Met: A307 Average Piece Weight: 0.0427000 lbs. Square head bolts or square head machine bolts offer a large bearing area for positive gripping; primarily used nowadays for aesthetic projects that create a rustic look or to match existing fasteners; comes in both fully threaded and partially threaded pitches. Square head bolts are sometimes selected over hex heads because the head will fit neatly in a channel.