The Washer,lock, cataloged under National Stock Number 5310-00-167-0856, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-167-0856 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Hardness Rating | 85.0 ROCKWELL B MINIMUM AND 95.0 ROCKWELL B MAXIMUM |
| Style Designator | FLAT INTERNAL TEETH |
| Outside Diameter | 0.460 INCHES MINIMUM AND 0.478 INCHES MAXIMUM IN |
| Material Thickness | 0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN |
| Departure From Cited Designator | AS MOD BY SURFACE TREATMENT |
| Nondefinitive Spec/std Data | 1 TYPE AND A GRADE AND 1 STYLE AND 3 COMPOSITION |
| Test Data Document | 81348-FFW100 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Hole Diameter | 0.256 INCHES MINIMUM AND 0.267 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 |
| Reference | Meaning |
|---|---|
| 335C799F40C1 | 5/1 Secondary reference Westinghouse Electric Corp |
| MS35333-91 | 2/2 Government specification standardization U.S. Government activity |
| FFW100 | 4/1 Identification reference U.S. Government activity |
| 3350799F4001 | 5/1 Secondary reference U.S. Government activity |
| 3350799P4001 | 5/1 Secondary reference Westinghouse Electric Corp |
| 335C799F40C1 | 5/1 Secondary reference U.S. Government activity |
| 3350799F4001 | 5/1 Secondary reference Westinghouse Electric Corp |
NSN 5310-00-167-0856 is a Washer,lock, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-167-0856: Hardness Rating: 85.0 ROCKWELL B MINIMUM AND 95.0 ROCKWELL B MAXIMUM; Style Designator: FLAT INTERNAL TEETH; Outside Diameter: 0.460 INCHES MINIMUM AND 0.478 INCHES MAXIMUM IN; Material Thickness: 0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN. 8 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.