Description
1396986 WSHR FLAT M2,5 X 0,8 SS A4 — BOLTON SKU 55173.
About the 1396986 Flat Washer, M2.5 x 0.8 A4
This item is a flat washer, part number 1396986, sized for M2,5 fasteners and manufactured from A4-group stainless steel. Flat washers distribute the clamping load of a screw or nut over a larger bearing area, protect the joint surface from damage during tightening, and help bridge slightly oversized or slotted holes. The A4 designation identifies the acid-resistant austenitic stainless steel group in the ISO stainless-fastener system, generally chosen where corrosion resistance beyond the A2 group is required. The 0,8 figure in the designation is a dimensional callout from the source data (consistent with a washer thickness in millimetres); the governing dimensional standard (e.g. DIN or ISO pattern) is not stated in the designation, so exact outside diameter and standard should be confirmed at quotation stage.
Key specifications
| Type | Flat washer |
|---|---|
| Nominal size | M2,5 |
| Designation dimension | 0,8 (per source designation) |
| Material | Stainless steel, A4 group |
| Part number | 1396986 |
Typical applications
Small metric flat washers are universal hardware in avionics, UAV and instrument assembly, and in general aerospace and industrial MRO work. A4 stainless variants are preferred where humidity, salt atmosphere or chemical exposure would degrade plain steel hardware.
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).


























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