The Washer Blank,aircra, cataloged under National Stock Number 5310-01-563-0802, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Washer Blank,aircra |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Northrop Grumman Systems Corporation (CAGE 0W6H8) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-563-0802 |
| Primary Part Number | HS1551S290 |
| Item Name | Washer Blank,aircra |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| HS1551S290 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| HS1551S290 | 5/9 Secondary reference Schweizer Aircraft Corp. |
| SHS1551S290 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| HS1551S290 | 5/9 Secondary reference Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| HS1551S290 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation |
NSN 5310-01-563-0802 is a Washer Blank,aircra, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-563-0802 has 1 manufacturer part number on file: HS1551S290 (Northrop Grumman Systems Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-644-8803. Verify interchangeability with system specifications before substitution.
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.