The Washer,lock, cataloged under National Stock Number 5310-00-680-9101, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-680-9101 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Style Designator | FLAT EXTERNAL AND INTERNAL TEETH |
| Material Document and Classification | QQ-C-591 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 1.797 INCHES MINIMUM AND 1.830 INCHES MAXIMUM IN |
| Material Thickness | 0.059 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN |
| Departure From Cited Document | AS MOD BY MATERIAL |
| Nondefinitive Spec/std Data | 5 TYPE AND 1 STYLE |
| 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.). |
| Material | COPPER ALLOY 651 OR COPPER ALLOY 655 OVERALL |
| Hole Diameter | 0.640 INCHES MINIMUM AND 0.663 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 |
|---|---|
| FFW100 | 4/1 Identification reference U.S. Government activity |
NSN 5310-00-680-9101 is a Washer,lock, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-680-9101: Style Designator: FLAT EXTERNAL AND INTERNAL TEETH; Material Document and Classification: QQ-C-591 FED SPEC ALL MATERIAL RESPONSES OVERALL; Outside Diameter: 1.797 INCHES MINIMUM AND 1.830 INCHES MAXIMUM IN; Material Thickness: 0.059 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN. 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.