Heavy Hex Bolts / Hex Structual Bolts

Hex bolts (six sided heads) are the industry standard for fasteners with forged heads and they can be used for many different applications.

SYSTEM	SIZE	LENGTH	GRADE	FINISH	SPECIFICATION
METRIC SYSTEM	M5-M48	10-300mm	Class 4.8 , 5.8, 8.8, 10.9, 12.9	PLAIN BLACK ZP YZP H.D.G GALVANIZED DACROMET	DIN931　 DIN933 DIN960　 DIN961 ISO4014　ISO4017
INCH SYSTEM	1/4"—2"	5/16"-12"	SAE J429--Grade 2,5,8 ASTM A307 ASTM A325 ASTM A490
					ASME B18.2.1 ASME B18.2.6