1/4'-20 x 3 (PT) Coarse Thread A307 Grade A Square Head Machine Bolt L

1/4'-20 x 3 (PT) Coarse Thread A307 Grade A Square Head Machine Bolt Low Carbon Steel Plain Finish Pk 900

$113.40 $305.69

PRODUCT SPECIFICATIONS

Part #: 0000-115540

Fastener Type: Square Head Machine Bolt
Size Description: 1/4'-20 x 3' (PT)
Diameter/Nominal Size: 1/4'
Length: 3'
Wrench Size/Across Flats: 0.362-0.375'
Width Across Corners: 0.498-0.530'
Head Height: 0.156-0.188'
Thread Pitch: 20
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: 0.0435000 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.