The Screw,machine, cataloged under National Stock Number 5305-00-815-5121, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-815-5121 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Fastener Length | 1.636 INCHES MINIMUM AND 1.681 INCHES MAXIMUM IN |
| Screw Material Document and Classification | AMS5732 ASSN STD 1ST MATERIAL RESPONSE OR AMS5733 ASSN STD 2ND MATERIAL RESPONSE |
| Thread Length | 0.425 INCHES MINIMUM AND 0.571 INCHES MAXIMUM IN |
| Hardness Rating | 248.0 BRINELL STANDARD MINIMUM AND 321.0 BRINELL STANDARD MAXIMUM |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Screw Material | IRON ALLOY 660 |
| Minimum Tensile Strength | 140000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Thread Series Designator | UNF |
| Head Diameter | 0.452 INCHES MINIMUM AND 0.510 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 |
| Reference | Meaning |
|---|---|
| NAS560HK4-18 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-00-815-5121 is a Screw,machine, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-00-815-5121: Fastener Length: 1.636 INCHES MINIMUM AND 1.681 INCHES MAXIMUM IN; Screw Material Document and Classification: AMS5732 ASSN STD 1ST MATERIAL RESPONSE OR AMS5733 ASSN STD 2ND MATERIAL RESPONSE; Thread Length: 0.425 INCHES MINIMUM AND 0.571 INCHES MAXIMUM IN; Hardness Rating: 248.0 BRINELL STANDARD MINIMUM AND 321.0 BRINELL STANDARD MAXIMUM. 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.