The Washer,flat, cataloged under National Stock Number 5310-01-259-7780, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corp. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-259-7780 |
| Primary Part Number | 863T0180126-004 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lockheed Martin Corp |
| Status | ACTIVE |
| Peripheral Shape Style | SQUARE |
| 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 |
|---|---|
| 863T0180126-004 PRIMARY | Lockheed Martin Corp (USA) |
| Reference | Meaning |
|---|---|
| 863T0180126 | D/9 Drawing number reference only Lockheed Martin Corp |
| 863T0180126 | D/9 Drawing number reference only Lockheed Martin Corp |
| 863T0180126-004 | 5/9 Secondary reference Lockheed Martin Corp |
NSN 5310-01-259-7780 is a Washer,flat, manufactured by Lockheed Martin Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-259-7780 has 1 manufacturer part number on file: 863T0180126-004 (Lockheed Martin Corp).
Key specifications for 863T0180126-004: Special Features: USED ON C144018SPREADER CONT; Peripheral Shape Style: SQUARE. 1 specification is 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.