The Washer,key, cataloged under National Stock Number 5310-00-981-8530, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-981-8530 |
| Primary Part Number | 9L1517 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Distance From Centerline to Inside of Prebent Key | 1.438 INCHES NOMINAL IN |
| External Prebent Key Length | 0.247 INCHES MINIMUM AND 0.249 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 2.882 INCHES NOMINAL IN |
| Style Designator | KEY |
| Outside Diameter | 2.763 INCHES NOMINAL IN |
| Material Thickness | 0.062 INCHES NOMINAL IN |
| External Prebent Key Width | 0.440 INCHES NOMINAL IN |
| Material | COPPER ALLOY OVERALL |
| Hole Diameter | 2.263 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 |
|---|---|
| 240576 N | Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems (USA) |
| 9L1517 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| 33775 | Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp. (USA) |
| Reference | Meaning |
|---|---|
| 240576 | 5/9 Secondary reference Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems |
| 2435786 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-981-8530 is a Washer,key, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-981-8530 has 3 manufacturer part numbers on file: 240576 N (Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems), 9L1517 (Caterpillar Inc Div Caterpillar Defense), 33775 (Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.).
2 possible matches (shared part number, not a government interchangeability claim): 4210-01-144-9041, 4820-01-298-7138. Verify interchangeability with system specifications before substitution.
Key specifications for 9L1517: Distance From Centerline to Inside of Prebent Key: 1.438 INCHES NOMINAL IN; External Prebent Key Length: 0.247 INCHES MINIMUM AND 0.249 INCHES MAXIMUM IN; Overall Distance Including Keys: 2.882 INCHES NOMINAL IN; Style Designator: KEY. 9 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.