The Washer,flat, cataloged under National Stock Number 5310-01-309-4800, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-309-4800 |
| Primary Part Number | 6242948-820 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-81751,TYPE 1,CLASS 4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 1.305 INCHES MINIMUM AND 1.342 INCHES MAXIMUM IN |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 316 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.649 INCHES MINIMUM AND 0.686 INCHES MAXIMUM IN |
| Thickness | 0.074 INCHES MINIMUM AND 0.121 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 |
|---|---|
| 6242948-820 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5310-01-309-4800 is a Washer,flat, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-309-4800 has 1 manufacturer part number on file: 6242948-820 (Naval Sea Systems Command).
Key specifications for 6242948-820: Surface Treatment Document and Classification: MIL-C-81751,TYPE 1,CLASS 4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 1.305 INCHES MINIMUM AND 1.342 INCHES MAXIMUM IN; Material Document and Classification: 66 FED STD ALL MATERIAL RESPONSES OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 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.