1/2"-13 x 3 1/4" (PT) Coarse Thread A307 Grade A Hex Bolt Low Carbon Steel Plain Finish

PRODUCT SPECIFICATIONS (Part # 0000-123691)
Fastener Type:	Hex Bolt
Size Description:	1/2"-13 x 3 1/4" (PT)
Diameter/Nominal Size:	1/2"
Length:	3 1/4"
Wrench Size/Across Flats:	3/4" (0.736-0.750")
Width Across Corners:	0.840-0.866"
Head Height:	5/16" (0.302-0.323")
Thread Pitch:	13
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:	Hex
Drive Type:	External Hex
Standards Met:	A307
Average Piece Weight:	0.2127000 lbs.

Hexagonal heads and machine threads used with a nut or in a tapped hole; also known as or machine bolts. Hex bolts are similar to hex cap screws.

What is the difference between a hex cap screw and a hex bolt? A hex cap screw has tighter tolerances on the body dimensions and features a chamfered end and a washer face under the bolt head. A hex cap screw is often called a finished hex bolt. Hex bolts have a flat end and lack the washer face under the head. Hex bolts may have an undersize body in longer lengths.