Description
1253379 WASHER FLAT M4X0,8 SST A4 DIN125A — BOLTON SKU 63729.
About the 1253379 Flat Washer M4, DIN 125A A4
The 1253379 is a metric flat washer to the DIN 125 A pattern, supplied for M4 fasteners in A4 (acid-resistant, 316-type) stainless steel. Distributor listings for article 1253379 record an outside diameter of 9 mm and a thickness of 0.8 mm — the DIN 125 A dimensions for the M4 size — and place the part in the Bossard BN 671 flat-washer range. DIN 125 A washers are plain, chamfer-free flat washers used to distribute the clamping load of a bolt head or nut over a larger bearing area, protect the mating surface during tightening and bridge clearance holes. The A4 stainless grade is selected where corrosion resistance beyond A2 is required, including marine, coastal and chemically exposed environments, and is normally paired with fasteners of the same grade.
Key specifications
| Type | Flat washer, plain (without chamfer) |
|---|---|
| Standard | DIN 125 A |
| Nominal size | M4 |
| Outside diameter | 9 mm |
| Thickness | 0.8 mm |
| Material | A4 (acid-resistant, 316-type) stainless steel |
| Manufacturer reference | Bossard BN 671 range, article 1253379 |
Typical applications
Coded flat washers of this class are used throughout aerospace and defence assembly, UAV airframe and avionics installation, and MRO workshop fastening where traceable, corrosion-resistant hardware is specified. They pair with M4 screws and nuts in general mechanical and electronics-enclosure assembly.
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.