The Washer,lock, cataloged under National Stock Number 5310-01-286-8007, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-286-8007 |
| Primary Part Number | 5338739-004SX |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Hardness Rating | 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Outside Diameter | 11.4 MILLIMETERS NOMINAL MM |
| Material Thickness | 1.5 MILLIMETERS MINIMUM AND 1.7 MILLIMETERS MAXIMUM MM |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 431 OVERALL |
| Hole Diameter | 6.3 MILLIMETERS MINIMUM AND 6.7 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 |
|---|---|
| 5338739-004SX | Metric and Multistandard Components Corp (USA) |
| 5338739-004SX PRIMARY | Naval Sea Systems Command (USA) |
| 5338739-004SX | Century Fasteners Corp. Dba Century Fasteners Corp (USA) |
| Reference | Meaning |
|---|---|
| 5310PL0818387 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 5338739-004SS | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| 5338739-004SX | 5/9 Secondary reference Sps Technologies Inc Unbrako Div |
NSN 5310-01-286-8007 is a Washer,lock, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-286-8007 has 3 manufacturer part numbers on file: 5338739-004SX (Metric and Multistandard Components Corp), 5338739-004SX (Naval Sea Systems Command), 5338739-004SX (Century Fasteners Corp. Dba Century Fasteners Corp).
Key specifications for 5338739-004SX: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM; Style Designator: SPLIT HELICAL-RIGHT HAND; Outside Diameter: 11.4 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.