The Washer,lock, cataloged under National Stock Number 5310-01-565-1110, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Fastenal Company Dba Fastenal Co. Government technical data includes 8 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-565-1110 |
| Primary Part Number | 33737 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Fastenal Company Dba Fastenal Co |
| Status | ACTIVE |
| Surface Treatment Document and Classification | ASTM B633, SC1. TYPE 111 AND BAKE ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | FLAT EXTERNAL TEETH |
| Material Document and Classification | SAE J403 1050-1065 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.494 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Material Thickness | 0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN |
| Surface Treatment | ZINC OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.256 INCHES MINIMUM AND 0.267 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 |
|---|---|
| 33737 PRIMARY | Fastenal Company Dba Fastenal Co (USA) |
NSN 5310-01-565-1110 is a Washer,lock, manufactured by Fastenal Company Dba Fastenal Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-565-1110 has 1 manufacturer part number on file: 33737 (Fastenal Company Dba Fastenal Co).
1 possible match (shared part number, not a government interchangeability claim): 2540-01-706-0664. Verify interchangeability with system specifications before substitution.
Key specifications for 33737: Surface Treatment Document and Classification: ASTM B633, SC1. TYPE 111 AND BAKE ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Style Designator: FLAT EXTERNAL TEETH; Material Document and Classification: SAE J403 1050-1065 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.494 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN. 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.