✓ In stock Class 8 zinc-plated steel metric hex nut to DIN 934 standard for M8-1.25 thread applications. The zinc plating provides corrosion resistance for use in exposed or semi-exposed automotive locations. Class 8 construction with 116,000 psi tensile strength suits demanding fastening applications — suspension mounts, engine accessories, body hardware, and structural brackets where an M8 thread is specified. Specifications Type: Metric Hex Nut Thread Size: M8-1.25 Thread Type: Regular (Coarse) Across Flats: 13mm Class: 8 Standard: DIN 934 Material: Steel Finish: Zinc Tensile Strength: 116,000 psi Vehicle Fitment Universal — M8-1.25 thread applications across domestic and import vehicles Cross-Reference Numbers Standard: DIN 934, M8-1.25 SMS Part#: 10573 What does Class 8 mean for a metric hex nut? Class 8 indicates the nut's mechanical strength grade. Class 8 nuts have a proof load stress of 800 MPa and are designed to mate with Class 8.8 bolts. They provide significantly higher clamping force than standard commercial-grade nuts and are appropriate for structural and high-vibration automotive applications. What is DIN 934? DIN 934 is an international standard defining the geometry, thread, and dimensional tolerances of standard metric hex nuts. A DIN 934 M8-1.25 nut will be interchangeable with any fastener, tool, or assembly that specifies this thread and standard. What wrench size do I need for an M8 nut? An M8 DIN 934 nut has a 13mm across-flats dimension, requiring a 13mm wrench or socket for installation and removal. Is M8-1.25 a standard or fine thread? M8-1.25 is the standard (coarse) thread pitch for M8 fasteners. The 1.25 refers to the distance in millimeters between thread peaks. A fine thread M8 would be M8-1.0. Always verify thread pitch before ordering — coarse and fine M8 nuts are not interchangeable. What pack sizes are available? Available in packs of 25, 50, 100, and 150 to suit individual repairs or shop stock needs.
