The Washer,flat, cataloged under National Stock Number 5310-01-447-0052, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rotary and Mission Systems. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-447-0052 |
| Primary Part Number | 63C515551P3 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lockheed Martin Corporation Div Rotary and Mission Systems |
| Status | ACTIVE |
| Overall Diameter | 0.820 INCHES MINIMUM AND 0.860 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Color | BLACK OVERALL |
| Peripheral Shape Style | ROUND |
| Material | RUBBER NEOPRENE OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.230 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN |
| Thickness | 0.090 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 |
|---|---|
| 63C515551P3 PRIMARY | Lockheed Martin Corporation Div Rotary and Mission Systems (USA) |
| 63C515551P3 | S.b.s. Precision Sheet Metal, Inc (USA) |
| Reference | Meaning |
|---|---|
| PL63E917722G2 REV.A IT11 | 5/9 Secondary reference Lockheed Martin Corporation Div Rotary and Mission Systems |
NSN 5310-01-447-0052 is a Washer,flat, manufactured by Lockheed Martin Corporation Div Rotary and Mission Systems, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-447-0052 has 2 manufacturer part numbers on file: 63C515551P3 (Lockheed Martin Corporation Div Rotary and Mission Systems), 63C515551P3 (S.b.s. Precision Sheet Metal, Inc).
Key specifications for 63C515551P3: Overall Diameter: 0.820 INCHES MINIMUM AND 0.860 INCHES MAXIMUM IN; Cross-Sectional Shape Style: RECTANGULAR; Color: BLACK OVERALL; Peripheral Shape Style: ROUND. 8 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.