The Washer,lock, cataloged under National Stock Number 5310-00-620-4838, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Support Services Corp. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-620-4838 |
| Primary Part Number | 579R186H02 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Support Services Corp |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM |
| Style Designator | FLAT INTERNAL TEETH |
| Material Document and Classification | QQ-S-766 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN |
| Material Thickness | 0.017 INCHES MINIMUM AND 0.019 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 410 OVERALL |
| Hole Diameter | 0.142 INCHES MINIMUM AND 0.150 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 |
| Part Number | Manufacturer |
|---|---|
| 579R186H02 PRIMARY | Northrop Grumman Support Services Corp (USA) |
| 433R228H02 | Northrop Grumman Support Services Corp (USA) |
| Reference | Meaning |
|---|---|
| 579R186H02 | 3/9 Design control — primary reference U.S. Government activity |
| 1706-01-00-4102 | 5/9 Secondary reference Itw Shakeproof Automotive Products |
| 433R228H02 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-620-4838 is a Washer,lock, manufactured by Northrop Grumman Support Services Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-620-4838 has 2 manufacturer part numbers on file: 579R186H02 (Northrop Grumman Support Services Corp), 433R228H02 (Northrop Grumman Support Services Corp).
Key specifications for 579R186H02: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Hardness Rating: 36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM; Style Designator: FLAT INTERNAL TEETH; Material Document and Classification: QQ-S-766 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.