The Washer,lock, cataloged under National Stock Number 5310-01-285-8579, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Metric and Multistandard Components Corp. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-285-8579 |
| Primary Part Number | 1808398-4 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Metric and Multistandard Components Corp |
| Status | ACTIVE |
| Surface Treatment Document and Classification | ASTM A360-78 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Hardness Rating | 35.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Outside Diameter | 9.2 MILLIMETERS NOMINAL MM |
| Material Thickness | 1.2 MILLIMETERS NOMINAL MM |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL CORROSION RESISTING AND STEEL COMP 420 OVERALL |
| Hole Diameter | 5.1 MILLIMETERS MINIMUM AND 5.3 MILLIMETERS MAXIMUM 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 |
|---|---|
| 1808398-4 | Northrop Grumman Systems Corporation (USA) |
| 1808398-4 PRIMARY | Metric and Multistandard Components Corp (USA) |
| 1808398-4 PRIMARY | Allmetal Screw Products Corp (USA) |
| 1808398-4 PRIMARY | Honeywell Intl Dba Honeywell Div Business and General Aviation (USA) |
| Reference | Meaning |
|---|---|
| 1808398 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| 1808398-4 | 5/9 Secondary reference Final Spin Enterprises Llc Dba G & B Fasteners |
NSN 5310-01-285-8579 is a Washer,lock, manufactured by Metric and Multistandard Components Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-285-8579 has 4 manufacturer part numbers on file: 1808398-4 (Northrop Grumman Systems Corporation), 1808398-4 (Metric and Multistandard Components Corp), 1808398-4 (Allmetal Screw Products Corp), 1808398-4 (Honeywell Intl Dba Honeywell Div Business and General Aviation).
Key specifications for 1808398-4: Surface Treatment Document and Classification: ASTM A360-78 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Hardness Rating: 35.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM; Style Designator: SPLIT HELICAL-RIGHT HAND; Outside Diameter: 9.2 MILLIMETERS NOMINAL MM. 8 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.