The Washer,flat, cataloged under National Stock Number 5310-00-810-7199, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-00-810-7199 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Overall Diameter | 0.312 INCHES NOMINAL IN |
| Material Document and Classification | QQ-A-250/5,TEMPER T3,ALCLAD FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-250/5,TEMPER T4,ALCLAD FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Departure From Cited Designator | PART NO. AN960OPD4 AS MODIFIED BY REPLY TO SPECIAL FEATURES |
| Surface Treatment | ANODIZE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| Thickness | 0.032 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 |
|---|---|
| AN960PD4 | 4/1 Identification reference U.S. Government activity |
NSN 5310-00-810-7199 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-810-7199: Overall Diameter: 0.312 INCHES NOMINAL IN; Material Document and Classification: QQ-A-250/5,TEMPER T3,ALCLAD FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-250/5,TEMPER T4,ALCLAD FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Departure From Cited Designator: PART NO. AN960OPD4 AS MODIFIED BY REPLY TO SPECIAL FEATURES. 10 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.