The Washer,flat, cataloged under National Stock Number 5310-00-978-1783, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Rolls-Royce Corporation. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 5310-00-978-1783 |
| Primary Part Number | 6828012 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rolls-Royce Corporation |
| Status | ACTIVE |
| Overall Diameter | 0.750 INCHES NOMINAL IN |
| Hardness Rating | 70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | DEE |
| Width | 0.687 INCHES NOMINAL IN |
| Material | GLASS OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.342 INCHES MINIMUM AND 0.351 INCHES MAXIMUM IN |
| Thickness | 0.090 INCHES MINIMUM AND 0.105 INCHES MAXIMUM 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 |
|---|---|
| 6828012 PRIMARY | Rolls-Royce Corporation (USA) |
| Reference | Meaning |
|---|---|
| ALL-1015 | 5/9 Secondary reference Flexfab Llc |
| 0AL-237 | 5/9 Secondary reference Flexfab Llc |
| 6828012 | 5/9 Secondary reference Allison Transmission Inc Dba Allison Transmission, Inc |
| 6828012 | 5/9 Secondary reference General Motors Corp |
| 6828012 | 5/9 Secondary reference American Couplings Co |
NSN 5310-00-978-1783 is a Washer,flat, manufactured by Rolls-Royce Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-978-1783 has 1 manufacturer part number on file: 6828012 (Rolls-Royce Corporation).
Key specifications for 6828012: Overall Diameter: 0.750 INCHES NOMINAL IN; Hardness Rating: 70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: DEE. 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.