The Washer,keyway, cataloged under National Stock Number 5310-00-568-9491, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is L3harris Technologies, Inc.. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-00-568-9491 |
| Primary Part Number | 2053404 |
| Item Name | Washer,keyway |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | L3harris Technologies, Inc. |
| Status | ACTIVE |
| External Keyway Width | 0.250 INCHES NOMINAL IN |
| Material Document and Classification | MIL-C-4042,COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.609 INCHES MINIMUM AND 1.641 INCHES MAXIMUM IN |
| Material Thickness | 0.012 INCHES NOMINAL IN |
| Surface Treatment | SILVER OVERALL |
| Material | COPPER ALLOY OVERALL |
| Hole Diameter | 0.376 INCHES MINIMUM AND 0.396 INCHES MAXIMUM IN |
| External Keyway Length | 0.657 INCHES NOMINAL 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 |
|---|---|
| 2053404 | L3harris Technologies, Inc. (USA) |
| 648914 | Bae Systems Information and Electronic Systems Integration Inc. Div Bae Systems Information & Electronic Systems Integration Inc (USA) |
| A2053404 | L3harris Technologies, Inc. (USA) |
| 648914-000 | L3harris Technologies, Inc. (USA) |
| Reference | Meaning |
|---|---|
| A2053404 | 5/9 Secondary reference U.S. Government activity |
| 2053404 | 3/9 Design control — primary reference Navcom Defense Electronics, Inc. |
NSN 5310-00-568-9491 is a Washer,keyway, manufactured by L3harris Technologies, Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-568-9491 has 4 manufacturer part numbers on file: 2053404 (L3harris Technologies, Inc.), 648914 (Bae Systems Information and Electronic Systems Integration Inc. Div Bae Systems Information & Electronic Systems Integration Inc), A2053404 (L3harris Technologies, Inc.), 648914-000 (L3harris Technologies, Inc.).
Key specifications for 2053404: External Keyway Width: 0.250 INCHES NOMINAL IN; Material Document and Classification: MIL-C-4042,COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 1.609 INCHES MINIMUM AND 1.641 INCHES MAXIMUM IN; Material Thickness: 0.012 INCHES NOMINAL 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.