The Screw,machine, cataloged under National Stock Number 5305-00-079-7429, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-079-7429 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Screw Surface Treatment | CADMIUM |
| Fastener Length | 1.418 INCHES NOMINAL IN |
| Screw Material Document and Classification | SPS-M-107 FSCM 56878 MFR REF SINGLE MATERIAL RESPONSE |
| Thread Length | 0.293 INCHES MINIMUM IN |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.497 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN |
| Screw Surface Treatment Document and Classification | NAS 672 ASSN STD SINGLE TREATMENT RESPONSE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| HT8181F4-18 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| SFH22-4A18 | 3/2 Design control — primary reference U.S. Government activity |
| SFH22-4A18 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
NSN 5305-00-079-7429 is a Screw,machine, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-00-079-7429: Screw Surface Treatment: CADMIUM; Fastener Length: 1.418 INCHES NOMINAL IN; Screw Material Document and Classification: SPS-M-107 FSCM 56878 MFR REF SINGLE MATERIAL RESPONSE; Thread Length: 0.293 INCHES MINIMUM IN. 17 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.