1/2"-13 x 4 1/2" A307 Grade A Square Head Machine Bolt Low Carbon Steel Hot Dip Galvanized

PRODUCT SPECIFICATIONS (Part # 0000-124608)
Fastener Type:	Square Head Machine Bolt
Size Description:	1/2"-13 x 4 1/2"
Diameter/Nominal Size:	1/2"
Length:	4 1/2"
Wrench Size/Across Flats:	0.725-0.750"
Width Across Corners:	0.995-1.061"
Head Height:	0.308-0.348"
Thread Pitch:	13
Thread Direction:	Right
System of Measurement:	Inch
Grade:	A (2)
Material:	Low Carbon Steel
Finish:	Hot Dip Galvanized
Head Type:	Square
Drive Type:	External Square
Standards Met:	A307
Average Piece Weight:	0.2600000 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.