The Washer,flat, cataloged under National Stock Number 5310-00-641-2135, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-641-2135 |
| Primary Part Number | B654120-7 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Overall Diameter | 1.000 INCHES NOMINAL IN |
| Hardness Rating | 80.0 ROCKWELL R MINIMUM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Minimum Tensile Strength | 6500 POUNDS PER SQUARE INCH LBS |
| Peripheral Shape Style | ROUND |
| Material | WOOL OR COTTON OR CELLULOSE OR GLASS OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.2031 INCHES NOMINAL IN |
| Thickness | 0.035 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 |
|---|---|
| B654120-7 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| K7874555PC7 PRIMARY | General Electric Company (USA) |
NSN 5310-00-641-2135 is a Washer,flat, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-641-2135 has 2 manufacturer part numbers on file: B654120-7 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), K7874555PC7 (General Electric Company).
Key specifications for B654120-7: Overall Diameter: 1.000 INCHES NOMINAL IN; Hardness Rating: 80.0 ROCKWELL R MINIMUM; Cross-Sectional Shape Style: RECTANGULAR; Minimum Tensile Strength: 6500 POUNDS PER SQUARE INCH LBS. 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.