The Washer,lock, cataloged under National Stock Number 5310-01-369-1805, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Leonardo S.p.a. Security & Information System Division. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-369-1805 |
| Primary Part Number | 3-10311-003 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Leonardo S.p.a. Security & Information System Division |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35,TY 4 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Outside Diameter | 0.184 INCHES MINIMUM AND 0.194 INCHES MAXIMUM IN |
| Material Thickness | 0.019 INCHES MINIMUM AND 0.029 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 304 OVERALL |
| Hole Diameter | 0.105 INCHES MINIMUM AND 0.115 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 |
|---|---|
| 3-10311-003 | Leonardo S.p.a. Security & Information System Division (ITA) |
| Reference | Meaning |
|---|---|
| 3-10311-003 | 5/9 Secondary reference Marconi Mobile Spa Ex Elmer Spa |
| A3026861-3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-369-1805 is a Washer,lock, manufactured by Leonardo S.p.a. Security & Information System Division, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-369-1805 has 1 manufacturer part number on file: 3-10311-003 (Leonardo S.p.a. Security & Information System Division).
Key specifications for 3-10311-003: Surface Treatment Document and Classification: QQ-P-35,TY 4 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: SPLIT HELICAL-RIGHT HAND; Outside Diameter: 0.184 INCHES MINIMUM AND 0.194 INCHES MAXIMUM IN; Material Thickness: 0.019 INCHES MINIMUM AND 0.029 INCHES MAXIMUM IN. 7 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.