The Washer,flat, cataloged under National Stock Number 5310-00-995-9679, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Rolls-Royce Solutions America Inc. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-995-9679 |
| Primary Part Number | 5131978 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rolls-Royce Solutions America Inc |
| Status | ACTIVE |
| Overall Diameter | 1.000 INCHES NOMINAL IN |
| Hardness Rating | 34.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.530 INCHES NOMINAL IN |
| Thickness | 0.164 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 |
|---|---|
| 1DD897 | Oshkosh Defense Llc (USA) |
| FP5131978 | Federal-Mogul Corporation Dba Federal-Mogul Div Fp Diesel (USA) |
| 5131978 PRIMARY | Rolls-Royce Solutions America Inc (USA) |
| 35-5131978 | Brighton Cromwell Llc (USA) |
| Reference | Meaning |
|---|---|
| 5131978 | 5/9 Secondary reference General Motors Corp |
| 5131978 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| PC5131978 | 5/9 Secondary reference Power Components (deutschland) Gmbh |
| 5310009959679 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| EMP21784 | 5/9 Secondary reference Empire Mfg Co Inc |
| 35-5131978 | 5/9 Secondary reference Ar Bee Corp |
NSN 5310-00-995-9679 is a Washer,flat, manufactured by Rolls-Royce Solutions America Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-995-9679 has 4 manufacturer part numbers on file: 1DD897 (Oshkosh Defense Llc), FP5131978 (Federal-Mogul Corporation Dba Federal-Mogul Div Fp Diesel), 5131978 (Rolls-Royce Solutions America Inc), 35-5131978 (Brighton Cromwell Llc).
Key specifications for 5131978: Overall Diameter: 1.000 INCHES NOMINAL IN; Hardness Rating: 34.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM; Cross-Sectional Shape Style: RECTANGULAR; 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.