Metric 316 Stainless Steel Split Ring Lock Washers (A4)
What are metric 316 stainless split ring lock washers? Metric 316 stainless split ring lock washers, grade A4, are metric helical spring washers that resist loosening from vibration. Made from marine-grade 316 stainless, comparable to metric A4, the split ring digs into the surface under load while the grade resists salt and chloride corrosion.
When should I use A4 metric lock washers?
A4 is the metric designation for a molybdenum-alloyed marine-grade stainless comparable to 316, giving far better resistance to salt and chloride pitting than A2. As a metric split ring washer it keeps its light-duty locking action in coastal and marine assemblies, biting the surface and holding spring tension against loosening. Match the washer to your metric bolt size and pair it with A4 metric bolts and nuts. Tighten to the correct torque and avoid over-tightening.
Why choose metric 316 stainless split ring lock washers
- Marine-grade corrosion resistance: A4 is molybdenum-alloyed like 316.
- Metric sizing: matched to M-series bolt diameters.
- Vibration locking: split ring bites the surface to resist loosening.
- Match grade: pairs with A4 metric hardware.
Common applications for metric 316 split ring lock washers
- Marine and coastal metric hardware
- Boats, docks, and saltwater exposure
- Wash-down and food-grade metric equipment
- Chlorinated and chemical metric assemblies
For general metric freshwater use, see A2 metric stainless split ring lock washers, and browse every material on the main lock washers category.
Metric 316 Stainless Split Ring Lock Washers FAQ
Is A4 the same as 316 stainless?
A4 is the metric grade comparable to 316. Both are molybdenum-alloyed marine-grade stainless with excellent salt and chloride resistance.
What metric sizes are available?
Common metric diameters such as M6, M8, and M10. Match the washer to your metric bolt size.
When should I choose A4 over A2?
Choose A4 for coastal, saltwater, and chloride exposure. A2, comparable to 304, suits general outdoor and freshwater use.