SAE J429 — Mechanical and Material Requirements for Externally Threaded Fasteners
Standard: SAE J429
SAE J429 defines the strength grades for inch-series bolts, screws, and studs — Grades 1, 2, 5, 8, and 8.2 — with their head markings.
What It Covers
- Grade 2, 5, and 8 mechanical properties
- Proof load and tensile requirements
- Head marking system
- Material and heat treatment