The Washer,key, cataloged under National Stock Number 5310-01-215-8510, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Anillo Industries Llc. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Washer,key |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Rosomak S.a (CAGE 0291H); Leonardo Spa Divisione Sistemi Di Difesa (CAGE A1140); Anillo Industries Llc (CAGE 10630); Northrop Grumman Systems Corp Div Weapon System (CAGE 8KP69); The Boeing Company (CAGE 8V613) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-215-8510 |
| Primary Part Number | HS1551-211P |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Anillo Industries Llc |
| Status | ACTIVE |
| 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 |
|---|---|
| HS1551-211P | Rosomak S.a (POL) |
| 721009128200 | Leonardo Spa Divisione Sistemi Di Difesa (ITA) |
| HS1551-211P PRIMARY | Anillo Industries Llc (USA) |
| HSS1551-211P PRIMARY | Northrop Grumman Systems Corp Div Weapon System (USA) |
| HS1551-211P PRIMARY | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| OSS1551-211P | 5/9 Secondary reference Alliant Techsystems Operations Llc |
| 5310PL1551182 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 10105646 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| HS1551-211P | 5/9 Secondary reference Mcdonnell Douglas Helicopter Co Inc |
| OSS1551-211P | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corp Div Weapon System |
NSN 5310-01-215-8510 is a Washer,key, manufactured by Anillo Industries Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-215-8510 has 5 manufacturer part numbers on file: HS1551-211P (Rosomak S.a), 721009128200 (Leonardo Spa Divisione Sistemi Di Difesa), HS1551-211P (Anillo Industries Llc), HSS1551-211P (Northrop Grumman Systems Corp Div Weapon System), HS1551-211P (The Boeing Company).
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.