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Identification marking
Grades of inch bolts and free-spinning nuts
SAE (J995) bolt head and nut grade identification
Grade identification marking
INTRODUCTION
No circumferential line marks
Two circumferential line marks located 120° apart
Two circumferential line marks located 60° apart
No circumferential line marks
Two circumferential line marks located 120° apart
Two circumferential line marks located 60° apart
47816352 10/12/2014
16
Grade
Marking description
Grade 2
No line marks
Grade 5
Three line marks
Grade 8
Six line marks
Grade 2
Grade 5
Grade 2
Grade 2
Grade 5
Grade 8
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