The Washer,lock, cataloged under National Stock Number 5310-01-020-5947, 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10 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-020-5947 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Hardness Rating | 35.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.533 INCHES MAXIMUM IN |
| Material Thickness | 0.125 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | C CLASS AND 2 STYLE |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 301 OR STEEL COMP 302 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 385 OR STEEL COMP 384 OVERALL |
| Hole Diameter | 0.380 INCHES MINIMUM AND 0.390 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 |
|---|---|
| D405212 ITEM 51 | C/1 Advisory reference — outside the item-of-supply concept Palfinger Marine Usa, Llc |
| 125-19555560 PI | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| FF-W-84 | 4/1 Identification reference U.S. Government activity |
| MS51848-52 | 2/2 Government specification standardization U.S. Government activity |
| MS51848-52 | 5/9 Secondary reference U.S. Government activity |
| MS51848-52 | 5/1 Secondary reference Sae International Dba Sae International |
NSN 5310-01-020-5947 is a Washer,lock, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-020-5947: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Hardness Rating: 35.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM; Style Designator: SPLIT HELICAL-RIGHT HAND; Material Document and Classification: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL. 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.