Metric 18-8 Stainless Steel External Tooth Lock Washers (A2)
What are metric 18-8 stainless external tooth lock washers? Metric 18-8 stainless external tooth lock washers, grade A2, are metric star washers with outward-facing teeth. Made from corrosion-resistant 18-8 stainless, comparable to metric A2, the teeth act on a larger diameter for strong grip while the stainless grade resists rust.
How do I size metric external tooth lock washers?
Metric external tooth washers are sized to metric bolt diameters such as M4, M6, M8, and M10, so match the washer to your bolt's metric size. In 18-8 stainless, comparable to metric A2, they add corrosion resistance for outdoor and freshwater use, while the outward-facing teeth act on a larger diameter to bite the surface and the bolt head for strong loosening resistance. They suit larger-head metric fasteners. Pair with A2 metric hardware, and for coastal exposure choose a 316 option. Tighten to the correct torque so the teeth seat.
Why choose metric 18-8 stainless external tooth lock washers
- Metric sizing: matched to M-series bolt diameters.
- Strong grip: outward teeth act on a larger diameter.
- Corrosion resistant: 18-8 stainless (A2) resists rust outdoors.
- Larger-head fit: suits pan and button head metric fasteners.
Common applications for metric 18-8 external tooth lock washers
- Larger-head metric fastener joints
- Metric electrical bonding and grounding
- Imported machinery and equipment
- Outdoor and freshwater metric work
For a hardened, springy option, see 410 stainless external tooth lock washers, and browse every material on the main lock washers category.
Metric 18-8 Stainless External Tooth Lock Washers FAQ
Is A2 the same as 18-8 stainless?
A2 is the metric designation comparable to 18-8 and 304 stainless, with similar corrosion resistance.
What metric sizes are available?
Common metric diameters such as M4, M6, M8, and M10. Match the washer to your metric bolt size.
What fasteners suit external tooth washers?
They work best with larger-head fasteners such as pan head and button head screws, where the head covers the outer teeth.