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PRODUCT SPECIFICATIONS
Part #: 0000-115539
Fastener Type: Square Head Machine Bolt
Size Description: 1/4"-20 x 3"
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 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: 0.0435000 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.