The Washer,key, cataloged under National Stock Number 5310-00-779-3904, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road). Government technical data includes 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-779-3904 |
| Primary Part Number | 663401 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) |
| Status | ACTIVE |
| Internal Straight Key Width | 0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN |
| Distance From Centerline to Top of Internal Key | 0.103 INCHES MINIMUM AND 0.108 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Material Document and Classification | MIL-S-5059 COND 1/4 HARD MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.730 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Material Thickness | 0.020 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 302 OVERALL |
| Internal Key Quantity | 1 |
| Hole Diameter | 0.380 INCHES MINIMUM AND 0.390 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 |
|---|---|
| 663401 PRIMARY | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) (USA) |
| Reference | Meaning |
|---|---|
| 663401 | 5/9 Secondary reference Alliedsignal Inc Dba Allied-Signal Aerospace Co |
| 663401 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-779-3904 is a Washer,key, manufactured by Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road), classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-779-3904 has 1 manufacturer part number on file: 663401 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)).
1 possible match (shared part number, not a government interchangeability claim): 5990-00-913-4155. Verify interchangeability with system specifications before substitution.
Key specifications for 663401: Internal Straight Key Width: 0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 0.103 INCHES MINIMUM AND 0.108 INCHES MAXIMUM IN; Style Designator: KEY; Material Document and Classification: MIL-S-5059 COND 1/4 HARD MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 10 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.