GB97 DIN125 A2-70 304 Stainless Steel Flat Washer Plain Gasket for Bolts and Nuts

GB97 DIN125 A2-70 304 Stainless Steel Flat Washer Plain Gasket for Bolts and Nuts

A2-70 grade 304 stainless steel flat washers to GB97 / DIN125 standard. The most widely used washer in electronics assembly, 3D printing, and general mechanical fastening. Distributes bolt load over a larger area to prevent pull-through and surface damage, while the 304 stainless steel provides excellent corrosion resistance for long-term installations.

Key Specifications

Why Choose GB97 DIN125 304 SS Flat Washers?

• A2-70 304 stainless steel — corrosion-resistant for indoor, outdoor, and humid environments
• DIN125 / GB97 standard — interchangeable with ISO 7089; fits all standard metric bolts and nuts
• Load distribution — spreads clamping force to prevent pull-through in thin panels and soft materials
• Surface protection — prevents bolt head and nut from marking or embedding into the workpiece surface
• Wide size range — M1.6 to M24 covers all standard electronics and mechanical assembly sizes

Typical Applications

• PCB and motherboard mounting (M3 flat washers under screw heads)
• 3D printer frame and enclosure assembly (M3/M4/M5)
• Aluminium extrusion profile assembly (M5/M6/M8)
• Electronics enclosure panel fastening
• Robotics and automation frame assembly
• General mechanical assembly requiring load distribution

Compatible With

All standard metric bolts and nuts M1.6–M24. Compatible with DIN931/DIN933 hex bolts, DIN912 socket head cap screws, DIN934 hex nuts, and all standard metric fasteners. Fits: Arduino/Raspberry Pi mounting (M3), NEMA 17/23 motor mounting (M3/M4), aluminium extrusion T-slot assembly (M5/M6/M8).

FAQ

Q: What is the difference between GB97 and DIN125?
A: GB97 is the Chinese national standard; DIN125 is the German/European standard. Both specify the same flat washer dimensions and are fully interchangeable for standard metric fasteners.

Q: Do I always need a flat washer?
A: Flat washers are recommended when: (1) the bolt head or nut is smaller than the hole, (2) the material is soft and prone to embedding, (3) load distribution is needed to prevent pull-through, or (4) the surface must be protected from marking.

Package Contents

• GB97 DIN125 A2-70 304 SS flat washers (quantity and size per selected variant)