The Washer,lock, cataloged under National Stock Number 5310-00-685-7028, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Frontgrade Technologies Inc.. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-685-7028 |
| Primary Part Number | 27435 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Frontgrade Technologies Inc. |
| Status | ACTIVE |
| Style Designator | FLAT INTERNAL TEETH |
| Outside Diameter | 0.336 INCHES MAXIMUM IN |
| Material Thickness | 0.020 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | COPPER ALLOY OVERALL |
| Hole Diameter | 0.168 INCHES MINIMUM AND 0.176 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 |
|---|---|
| 27435 PRIMARY | Frontgrade Technologies Inc. (USA) |
| Reference | Meaning |
|---|---|
| 27435 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-685-7028 is a Washer,lock, manufactured by Frontgrade Technologies Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-685-7028 has 1 manufacturer part number on file: 27435 (Frontgrade Technologies Inc.).
3 possible matches (shared part number, not a government interchangeability claim): 1650-00-694-4948, 5895-00-846-1274, 6515-01-600-0841. Verify interchangeability with system specifications before substitution.
Key specifications for 27435: Style Designator: FLAT INTERNAL TEETH; Outside Diameter: 0.336 INCHES MAXIMUM IN; Material Thickness: 0.020 INCHES NOMINAL IN; Surface Treatment: CADMIUM OVERALL. 6 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.