The Screw,machine, cataloged under National Stock Number 5305-01-421-2026, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 12 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-421-2026 |
| Primary Part Number | 469-6408559-4 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Head Height | 0.500 INCHES NOMINAL IN |
| Fastener Length | 1.000 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN |
| Thread Length | 0.400 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | KNURLED NO. 1 |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL CORROSION RESISTING |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.750 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 |
|---|---|
| 469-6408559-4 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| DF4058-0164P121 | 5/9 Secondary reference Naval Sea Systems Command |
| 438-6404482-481 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 469-6408559-5 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 6408559-4 | 5/9 Secondary reference Naval Sea Systems Command |
| 211015955 | 5/9 Secondary reference Naval Sea Systems Command |
NSN 5305-01-421-2026 is a Screw,machine, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-421-2026 has 1 manufacturer part number on file: 469-6408559-4 (Naval Sea Systems Command).
Key specifications for 469-6408559-4: Head Height: 0.500 INCHES NOMINAL IN; Fastener Length: 1.000 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN; Thread Length: 0.400 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.250 INCHES IN. 12 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.