The Washer,key, cataloged under National Stock Number 5310-00-545-3073, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp. Government technical data includes 11 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 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-545-3073 |
| Primary Part Number | 743005 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp |
| Status | ACTIVE |
| Internal Straight Key Width | 0.056 INCHES MINIMUM AND 0.058 INCHES MAXIMUM IN |
| Distance From Centerline to Top of Internal Key | 0.071 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | 990104 CAGEC 06481 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | KEY |
| Material Document and Classification | MIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.360 INCHES NOMINAL IN |
| Material Thickness | 0.019 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 302 OVERALL |
| Internal Key Quantity | 1 |
| Hole Diameter | 0.189 INCHES MINIMUM AND 0.190 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 |
|---|---|
| 743005 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA) |
NSN 5310-00-545-3073 is a Washer,key, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-545-3073 has 1 manufacturer part number on file: 743005 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp).
2 possible matches (shared part number, not a government interchangeability claim): 5945-01-412-4081, 6130-01-418-2790. Verify interchangeability with system specifications before substitution.
Key specifications for 743005: Internal Straight Key Width: 0.056 INCHES MINIMUM AND 0.058 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 0.071 INCHES NOMINAL IN; Surface Treatment Document and Classification: 990104 CAGEC 06481 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Style Designator: KEY. 11 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.