What Are SAE J429 Grade 2, Grade 5, and Grade 8 Bolts Used For?
Fastener Knowledge
A collection of articles about fasteners, covering product types, standards, materials, specifications, terminology, applications, and related topics.
DIN 961 vs ISO 8676: Are They Equivalent?
DIN 961 is withdrawn and ISO 8676 replaces it. What is genuinely equivalent, the four sizes where the width across flats changed, and how to verify a substitution.
DIN 960 vs DIN 931: What Is the Difference?
DIN 960 is the fine pitch bolt and DIN 931 is the coarse pitch bolt — same head, same shank, different thread. What changes in the joint and how to specify either one.
DIN 960 vs DIN 961: What Is the Difference?
DIN 960 vs DIN 961: one is partially threaded, the other threaded to the head. What each gives in the joint and the ISO successors behind both.
DIN 960 vs ISO 8765: Are They the Same?
DIN 960 is withdrawn and ISO 8765:2022 is current. What a DIN 960 ISO equivalent really means, and the four sizes where the width across flats changed.
DIN 933 Bolt Grades: 8.8, 10.9, 12.9, A2 and A4 Explained
DIN 933 fixes the bolt's shape, not its grade. What property classes 8.8, 10.9 and 12.9 actually mean, how A2-70 and A4-80 work, and how to specify one.
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