Hex Bolt Grades

Note, if the bolt is blank and doesn't have a manufactuer marking on this list. It's best to assume that it doesn't meet any specification. If it has a manufactuer marking that's on this list than it probably meets the grade 2 specifications.

Specification BodySpecificationGradeMarkingMartensitic SAE J429 1 No SAE J429 2 ASTM A307 A SAE J429 5 No ASTM A449 1 SAE J429 5.2 Yes ASTM A449 2 SAE J429 7 No SAE J429 8 No SAE J429 8.2 Unknown ASTM A354 BD No

AlloySpecification BodySpecificationMarking

303, 304, 304 L, 305, 384, XM1, 18-9LW, 302HQ, 303Se

ASTM F593C