The Washer,key, cataloged under National Stock Number 5310-00-977-1509, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-977-1509 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Internal Prebent Key Width | 0.304 INCHES NOMINAL IN |
| Overall Distance Including Keys | 2.893 INCHES NOMINAL IN |
| Heat Treatment | AS FABRICATED |
| Style Designator | EXTERNAL AND INTERNAL PRE-BENT KEYS |
| Material Document and Classification | AMS 5040 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 2.691 INCHES NOMINAL IN |
| Material Thickness | 0.046 INCHES NOMINAL IN |
| External Key Quantity | 15 |
| Internal Prebent Key Length | 0.156 INCHES NOMINAL IN |
| Color | BLACK OVERALL |
| Surface Treatment | OXIDE FILM OVERALL |
| External Prebent Key Width | 0.255 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Internal Key Quantity | 3 |
| Hole Diameter | 2.272 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 |
| Reference | Meaning |
|---|---|
| 37B200279P101 | 5/9 Secondary reference Valcore Manufacturing Llc |
| 37B200279P101 | 5/9 Secondary reference General Electric Company Dba Ge Structured Services Div General Electric Structured Services, Lp |
| 37B200279P101 | 3/2 Design control — primary reference U.S. Government activity |
| 37B200279P101 | 5/9 Secondary reference Crystal Machine and Die Corp |
NSN 5310-00-977-1509 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-977-1509: Internal Prebent Key Width: 0.304 INCHES NOMINAL IN; Overall Distance Including Keys: 2.893 INCHES NOMINAL IN; Heat Treatment: AS FABRICATED; Style Designator: EXTERNAL AND INTERNAL PRE-BENT KEYS. 15 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.