Description
Flat Washer M4x0.8 A4 Stainless Steel DIN 125A — BOLTON SKU 57604.
About the Flat Washer M4x0.8 A4 Stainless Steel DIN
The Flat Washer M4x0.8 A4 Stainless Steel is a plain flat washer made to the DIN 125 form A pattern for M4 fasteners. The standard’s dimension table for this size gives a 4.3 mm inside diameter and 9 mm outside diameter at the 0.8 mm thickness carried in the designation. Material is A4 stainless steel — the acid-resistant austenitic 316-family grade whose molybdenum content protects against pitting in chloride-laden and coastal atmospheres. Using an A4 washer under A4 screws and nuts keeps every element of the joint in one corrosion class. Batch certificates of conformity and packaging or kitting preferences can be included in your request for quotation. At 0.8 mm thick the washer adds minimal stack height under the head, which matters in shallow counterbores and tight electronic assemblies where grip length is calculated closely.
Key specifications
| Fits thread | M4 |
|---|---|
| Standard | DIN 125 form A |
| Inside diameter | 4.3 mm (per DIN 125 A table for M4) |
| Outside diameter | 9 mm (per DIN 125 A table for M4) |
| Thickness | 0.8 mm |
| Material | A4 stainless steel |
Typical applications
M4 washers of this pattern sit under small screw heads on enclosures, instrument panels and light brackets, preventing the head from marking painted or soft surfaces and helping torque settle consistently. The A4 material suits electronics and equipment installed in humid, marine or washdown environments.
Supplied by BOLTON Technical Equipment Supplies against request for quotation. Add this item to your RFQ basket to request pricing, lead time and documentation requirements (e.g. CoC, datasheets or test reports where applicable).
Browse more in MIL-Spec & Coded Fasteners.
Reviews
There are no reviews yet.