The Screw,machine, cataloged under National Stock Number 5305-01-042-4403, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Allmetal Screw Products Corp. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-042-4403 |
| Primary Part Number | 321-0307-00 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Allmetal Screw Products Corp |
| Status | ACTIVE |
| Head Height | 0.045 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN |
| Screw Surface Treatment | NICKEL |
| Fastener Length | 0.375 INCHES NOMINAL IN |
| Thread Length | 0.347 INCHES MINIMUM IN |
| Nominal Thread Diameter | 0.073 INCHES IN |
| Head Style | FILLISTER |
| Thread Direction | RIGHT-HAND |
| Screw Material | COPPER ALLOY 230 OR COPPER ALLOY 240 OR COPPER ALLOY 260 OR COPPER ALLOY 268 OR COPPER ALLOY 342 OR COPPER ALLOY 353 OR COPPER ALLOY 360 OR COPPER ALLOY 377 OR COPPER ALLOY 764 OR COPPER ALLOY 270 OR COPPER ALLOY 510 OR COPPER ALLOY 745 OR COPPER ALLOY 752 OR COPPER ALLOY 770 |
| Minimum Tensile Strength | 55000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 72 |
| Thread Series Designator | UNF |
| Head Diameter | 0.104 INCHES MINIMUM AND 0.118 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 |
|---|---|
| 321-0307-00 PRIMARY | Allmetal Screw Products Corp (USA) |
| Reference | Meaning |
|---|---|
| 321-0307-00 | 7/2 Vendor item drawing reference Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| 321-0307-000 | C/1 Advisory reference — outside the item-of-supply concept The Ry Ferner Co Inc Dba Metric Screw and Tool |
| 321-0307-00 | 3/9 Design control — primary reference U.S. Government activity |
| 321-0307-00 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-042-4403 is a Screw,machine, manufactured by Allmetal Screw Products Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-042-4403 has 1 manufacturer part number on file: 321-0307-00 (Allmetal Screw Products Corp).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-314-3559. Verify interchangeability with system specifications before substitution.
Key specifications for 321-0307-00: Head Height: 0.045 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN; Screw Surface Treatment: NICKEL; Fastener Length: 0.375 INCHES NOMINAL IN; Thread Length: 0.347 INCHES MINIMUM 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.