The Washer,flat, cataloged under National Stock Number 5310-00-452-4775, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Bae Systems (operations) Limited. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-452-4775 |
| Primary Part Number | STD2186-1 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bae Systems (operations) Limited |
| Status | ACTIVE |
| Overall Diameter | 0.719 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.375 INCHES NOMINAL IN |
| Thickness | 0.125 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| STD2186-1 | Bae Systems (operations) Limited (GBR) |
| Reference | Meaning |
|---|---|
| STD2186-1 | 3/9 Design control — primary reference British Aerospace (military Aircraft & Aerostructures) |
| 99-6039162 | 6/9 Informative reference only U.S. Government activity |
| STD2186-1 | C/1 Advisory reference — outside the item-of-supply concept Bae Systems Plc |
NSN 5310-00-452-4775 is a Washer,flat, manufactured by Bae Systems (operations) Limited, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-452-4775 has 1 manufacturer part number on file: STD2186-1 (Bae Systems (operations) Limited).
Key specifications for STD2186-1: Overall Diameter: 0.719 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Special Features: 2 EQUALLY SPACED PROJECTIONS EXTENDING FROM BEARING SURFACE EACH SIDE OF CENTRALLY LOCATED HOLE 0.125 IN. WIDE BY 0.188 IN. HIGH;2 HOLES 0.043 IN. DIA,THRU WASHER PERIPHERY AND PARALLEL TO PROJECTIONS IN; Peripheral Shape Style: ROUND. 7 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.