The Washer,lock, cataloged under National Stock Number 5310-01-180-2559, 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11 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-180-2559 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Special Test Features | SPECIAL QUALITY CONTROL TESTING |
| Hardness Rating | 35.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM |
| Criticality Code Justification | ZZZY |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 0.489 INCHES MAXIMUM IN |
| Material Thickness | 0.062 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | B CLASS OR C CLASS AND 2 STYLE |
| Material | STEEL COMP 420 OR STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 302B OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL COMP 308 OR STEEL COMP 309 OR STEEL COMP 309S OR STEEL COMP 310 OR STEEL COMP 310S OR STEEL COMP 314 OR STEEL COMP 316 OR STEEL COMP 316L OR STEEL COMP 317 OR STEEL COMP 321 OR STEEL COMP 347 OR STEEL COMP 348 OR STEEL COMP 384 OR STEEL COMP 385 OVERALL |
| Hole Diameter | 0.255 INCHES MINIMUM AND 0.263 INCHES MAXIMUM IN |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY MATERIAL WHICH MUST CONFORM TO SHIPS PARTS CONTROL CENTER SPECIAL QUALITY CONTROL PROVISIONS AND CERTIFIED FREE FROM MERCURY CONTAMINATION |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| 2670-57 ITEM 82 | 3/1 Design control — primary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| FF-W-84 | 4/1 Identification reference U.S. Government activity |
| 503-4556027 ITEM 82 | 5/1 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 5310-01-180-2559 is a Washer,lock, classified under FSC 5310, Nuts and Washers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5310-01-193-9729. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-01-180-2559: Special Test Features: SPECIAL QUALITY CONTROL TESTING; Hardness Rating: 35.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM; Criticality Code Justification: ZZZY; Style Designator: SPLIT HELICAL-RIGHT HAND. 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.