The Washer,flat, cataloged under National Stock Number 5310-01-428-2151, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-428-2151 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 1.993 INCHES MINIMUM AND 2.030 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Departure From Cited Document | AS MODIFIED BY MATERIAL. |
| Nondefinitive Spec/std Data | A TYPE AND 1 GRADE AND B CLASS |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 304 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.805 INCHES MINIMUM AND 0.842 INCHES MAXIMUM IN |
| Thickness | 0.122 INCHES MINIMUM AND 0.177 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 |
|---|---|
| 122-5277668 ITEM 83 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| MS15795-823 | 5/9 Secondary reference U.S. Government activity |
| FF-W-92 | 4/1 Identification reference U.S. Government activity |
| MS15795-823 | 5/1 Secondary reference U.S. Government activity |
| MS15795-823 CRE S 304 ONLY | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5310-01-428-2151 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5310-01-517-0279. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-01-428-2151: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 1.993 INCHES MINIMUM AND 2.030 INCHES MAXIMUM IN; Cross-Sectional Shape Style: RECTANGULAR; Departure From Cited Document: AS MODIFIED BY MATERIAL.. 11 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.