5/16'-18 x 3 1/2' A307 Grade A Square Head Machine Bolt Low Carbon Ste

5/16'-18 x 3 1/2' A307 Grade A Square Head Machine Bolt Low Carbon Steel Zinc Plated Pk 300

$77.22 $219.83

PRODUCT SPECIFICATIONS

Part #: 0000-118627

Fastener Type: Square Head Machine Bolt
Size Description: 5/16'-18 x 3 1/2'
Diameter/Nominal Size: 5/16'
Length: 3 1/2'
Wrench Size/Across Flats: 0.484-0.500'
Width Across Corners: 0.665-0.707'
Head Height: 0.186-0.220'
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: 0.0800000 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.