The Screw,machine, cataloged under National Stock Number 5305-00-042-7224, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Fmc Corp. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-00-042-7224 |
| Primary Part Number | P1579 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Fmc Corp |
| Status | ACTIVE |
| Screw Surface Treatment | CADMIUM OR ZINC |
| Fastener Length | 2.000 INCHES NOMINAL IN |
| Screw Material Document and Classification | QQ-S-633 FED SPEC ALL MATERIAL RESPONSES |
| Thread Length | 2.000 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Nondefinitive Spec/std Data | 2C STYLE AND 3 TYPE |
| Screw Material | STEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 28 |
| Thread Series Designator | UNF |
| Head Diameter | 0.477 INCHES MINIMUM AND 0.507 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 |
|---|---|
| P1579 | Fmc Corp (USA) |
| 427224 | Army Weapons Command Attn Amswe-Ree-S (USA) |
| 7088891 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 427224 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| 427224 | 5/9 Secondary reference General Motors Corp |
| FFS92TYPE3STYLE2E | 4/1 Identification reference U.S. Government activity |
| P1579 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-00-042-7224 is a Screw,machine, manufactured by Fmc Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-042-7224 has 3 manufacturer part numbers on file: P1579 (Fmc Corp), 427224 (Army Weapons Command Attn Amswe-Ree-S), 7088891 (U S Army Tank Automotive Command Amsta-Im-Mm).
1 possible match (shared part number, not a government interchangeability claim): 5365-00-737-7492. Verify interchangeability with system specifications before substitution.
Key specifications for P1579: Screw Surface Treatment: CADMIUM OR ZINC; Fastener Length: 2.000 INCHES NOMINAL IN; Screw Material Document and Classification: QQ-S-633 FED SPEC ALL MATERIAL RESPONSES; Thread Length: 2.000 INCHES NOMINAL IN. 15 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.