The Washer,flat, cataloged under National Stock Number 5310-00-685-3299, 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10 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-685-3299 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A-8625 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-5541 MIL SPEC 2ND TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-A-561 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-411 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-359 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-356 FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | ANODIZE OR CHROMATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | ALUMINUM ALLOY 1100 OR ALUMINUM ALLOY 3003 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| Thickness | 0.059 INCHES MINIMUM AND 0.069 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 |
|---|---|
| ES138A125-312T | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| ES138A125-312T | 3/9 Design control — primary reference Drs Sustainment Systems, Inc. |
NSN 5310-00-685-3299 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-685-3299: Surface Treatment Document and Classification: MIL-A-8625 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-5541 MIL SPEC 2ND TREATMENT RESPONSE OVERALL; Overall Diameter: 0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN; Material Document and Classification: QQ-A-561 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-411 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-359 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-356 FED SPEC 2ND MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 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.