The Washer,lock, cataloged under National Stock Number 5310-00-990-8734, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-00-990-8734 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Style Designator | COUNTERSINK INTERNAL TEETH |
| Material Document and Classification | QQ-C-533 FED SPEC 1ST MATERIAL RESPONSE OR ASTM B194 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.297 INCHES MINIMUM AND 0.303 INCHES MAXIMUM IN |
| Material Thickness | 0.005 INCHES MINIMUM AND 0.006 INCHES MAXIMUM IN |
| Countersink Angle | 82.0 DEGREES NOMINAL |
| Material | COPPER ALLOY 170 OR COPPER ALLOY OVERALL |
| Hole Diameter | 0.125 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 |
| Reference | Meaning |
|---|---|
| 17647-001 | 3/9 Design control — primary reference Solartron Electronics Inc Weston Instruments Div |
NSN 5310-00-990-8734 is a Washer,lock, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-990-8734: Style Designator: COUNTERSINK INTERNAL TEETH; Material Document and Classification: QQ-C-533 FED SPEC 1ST MATERIAL RESPONSE OR ASTM B194 ASSN STD 2ND MATERIAL RESPONSE OVERALL; Outside Diameter: 0.297 INCHES MINIMUM AND 0.303 INCHES MAXIMUM IN; Material Thickness: 0.005 INCHES MINIMUM AND 0.006 INCHES MAXIMUM IN. 7 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.