The Washer,flat, cataloged under National Stock Number 5310-01-292-3299, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-292-3299 |
| Primary Part Number | 5521648 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Outside Left Corner Chamfer Angle | 45.0 DEGREES NOMINAL |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 2 FED SPEC 1ST TREATMENT RESPONSE OR MIL-C-87115,CLASS 1 MIL SPEC 2ND TREATMENT RESPONSE OR MIL-C-83488,TYPE 2,CLASS 2 MIL SPEC 3RD TREATMENT RESPONSE OVERALL |
| Overall Diameter | 29.75 MILLIMETERS MINIMUM AND 30.25 MILLIMETERS MAXIMUM MM |
| Cross-Sectional Shape Style | BLANK RECTANGULAR |
| Surface Treatment | CADMIUM AND CHROMATE OR ZINC AND CHROMATE OR ALUMINUM ALLOY OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL |
| Center Hole Shape Style | ROUND |
| Thickness | 3.175 MILLIMETERS NOMINAL MM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 5521648 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5310-01-292-3299 is a Washer,flat, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-292-3299 has 1 manufacturer part number on file: 5521648 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 4930-01-697-2966. Verify interchangeability with system specifications before substitution.
Key specifications for 5521648: Outside Left Corner Chamfer Angle: 45.0 DEGREES NOMINAL; Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 2 FED SPEC 1ST TREATMENT RESPONSE OR MIL-C-87115,CLASS 1 MIL SPEC 2ND TREATMENT RESPONSE OR MIL-C-83488,TYPE 2,CLASS 2 MIL SPEC 3RD TREATMENT RESPONSE OVERALL; Overall Diameter: 29.75 MILLIMETERS MINIMUM AND 30.25 MILLIMETERS MAXIMUM MM; Cross-Sectional Shape Style: BLANK RECTANGULAR. 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.