The Washer,flat, cataloged under National Stock Number 5310-01-390-3380, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Boughton Engineering 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-390-3380 |
| Primary Part Number | 87024A0028 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Boughton Engineering Limited |
| Status | ACTIVE |
| Overall Diameter | 45.0 MILLIMETERS NOMINAL MM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Outside Right Corner Chamfer Angle | 45.0 DEGREES NOMINAL |
| Peripheral Shape Style | ROUND |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 16.5 MILLIMETERS NOMINAL MM |
| Thickness | 10.0 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| 87024A0028 | Boughton Engineering Limited (GBR) |
| Reference | Meaning |
|---|---|
| 87024A0028 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-390-3380 is a Washer,flat, manufactured by Boughton Engineering Limited, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-390-3380 has 1 manufacturer part number on file: 87024A0028 (Boughton Engineering Limited).
Key specifications for 87024A0028: Overall Diameter: 45.0 MILLIMETERS NOMINAL MM; Cross-Sectional Shape Style: RECTANGULAR; Outside Right Corner Chamfer Angle: 45.0 DEGREES NOMINAL; 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.