1"-8 x 3 1/2" (PT) Coarse Thread A307 Grade A Square Head Machine Bolt Low Carbon Steel Plain Finish

PRODUCT SPECIFICATIONS (Part # 0000-130908)
Fastener Type:	Square Head Machine Bolt
Size Description:	1"-8 x 3 1/2" (PT)
Diameter/Nominal Size:	1"
Length:	3 1/2"
Wrench Size/Across Flats:	1.450-1.500"
Width Across Corners:	1.991-2.121"
Head Height:	0.628-0.684"
Thread Pitch:	8
Thread Pitch Type:	Coarse
Thread Direction:	Right
Thread Coverage:	Partial
System of Measurement:	Inch
Grade:	A (2)
Material:	Low Carbon Steel
Finish:	Plain Finish (No Plating)
Head Type:	Square
Drive Type:	External Square
Standards Met:	A307
Average Piece Weight:	1.0000000 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.