The Washer,flat, cataloged under National Stock Number 5310-00-939-0604, 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10 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-00-939-0604 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Overall Diameter | 0.515 INCHES MINIMUM AND 0.525 INCHES MAXIMUM IN |
| Heat Treatment | AS FABRICATED |
| Material Document and Classification | QQ-S-698 FED SPEC 1ST MATERIAL RESPONSE AND QQ-S-698 FED SPEC 2ND MATERIAL RESPONSE AND QQ-S-698 FED SPEC 3RD MATERIAL RESPONSE AND QQ-S-698 FED SPEC 4TH MATERIAL RESPONSE AND QQ-S-698 FED SPEC 5TH MATERIAL RESPONSE AND QQ-S-698 FED SPEC 6TH MATERIAL RESPONSE AND MIL-S-7952 MIL SPEC 7TH MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 1008 OR STEEL COMP 1009 OR STEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1020 OR STEEL COMP 1025 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.319 INCHES MINIMUM AND 0.329 INCHES MAXIMUM IN |
| Thickness | 0.057 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 |
|---|---|
| 5310PL1641452 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| LS5984S5H | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-939-0604 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-939-0604: Overall Diameter: 0.515 INCHES MINIMUM AND 0.525 INCHES MAXIMUM IN; Heat Treatment: AS FABRICATED; Material Document and Classification: QQ-S-698 FED SPEC 1ST MATERIAL RESPONSE AND QQ-S-698 FED SPEC 2ND MATERIAL RESPONSE AND QQ-S-698 FED SPEC 3RD MATERIAL RESPONSE AND QQ-S-698 FED SPEC 4TH MATERIAL RESPONSE AND QQ-S-698 FED SPEC 5TH MATERIAL RESPONSE AND QQ-S-698 FED SPEC 6TH MATERIAL RESPONSE AND MIL-S-7952 MIL SPEC 7TH 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.