The Screw,machine, cataloged under National Stock Number 5305-01-476-9803, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Huntington Ingalls Inc Div Newport News Shipbuilding. Government technical data includes 14 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-476-9803 |
| Primary Part Number | 4457290-20 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huntington Ingalls Inc Div Newport News Shipbuilding |
| Status | ACTIVE |
| Head Height | 0.160 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN |
| Fastener Length | 0.625 INCHES MAXIMUM IN |
| Screw Material Document and Classification | QQ-N-281,CLASSA FED SPEC 1ST MATERIAL RESPONSE |
| Thread Length | 0.625 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | ROUND |
| Thread Direction | RIGHT-HAND |
| Nondefinitive Spec/std Data | 1 TYPE AND 1S STYLE |
| Screw Material | NICKEL ALLOY 400 |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.443 INCHES MINIMUM AND 0.472 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 |
|---|---|
| 4457290-20 PRIMARY | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| FF-S-92 | 4/1 Identification reference U.S. Government activity |
| 0.250-20UNC-2AX0.625IN.MONEL | 5/9 Secondary reference U.S. Government activity |
| 0.250-20UNC-2AX 0.625IN.MONEL | 5/9 Secondary reference Zf Industrieantriebe Witten Gmbh |
NSN 5305-01-476-9803 is a Screw,machine, manufactured by Huntington Ingalls Inc Div Newport News Shipbuilding, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-476-9803 has 1 manufacturer part number on file: 4457290-20 (Huntington Ingalls Inc Div Newport News Shipbuilding).
Key specifications for 4457290-20: Head Height: 0.160 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN; Fastener Length: 0.625 INCHES MAXIMUM IN; Screw Material Document and Classification: QQ-N-281,CLASSA FED SPEC 1ST MATERIAL RESPONSE; Thread Length: 0.625 INCHES NOMINAL IN. 14 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.