The Washer,flat, cataloged under National Stock Number 5310-01-077-8320, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Tolomatic, Inc. 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-077-8320 |
| Primary Part Number | 07201011 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Tolomatic, Inc |
| Status | ACTIVE |
| Overall Diameter | 0.812 INCHES NOMINAL IN |
| Hardness Rating | 50.0 ROCKWELL C NOMINAL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Features Provided | CASEHARDENED |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.406 INCHES NOMINAL IN |
| Thickness | 0.060 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 |
|---|---|
| 07201011 PRIMARY | Tolomatic, Inc (USA) |
NSN 5310-01-077-8320 is a Washer,flat, manufactured by Tolomatic, Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-077-8320 has 1 manufacturer part number on file: 07201011 (Tolomatic, Inc).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-215-9496. Verify interchangeability with system specifications before substitution.
Key specifications for 07201011: Overall Diameter: 0.812 INCHES NOMINAL IN; Hardness Rating: 50.0 ROCKWELL C NOMINAL; Cross-Sectional Shape Style: RECTANGULAR; Features Provided: CASEHARDENED. 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.