The Screw,machine, cataloged under National Stock Number 5305-01-503-0709, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-503-0709 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Fastener Length | 2.526 INCHES NOMINAL IN |
| Screw Material Document and Classification | QQ-S-763, CLASS 304, 321 OR 347, CONDITION A FED SPEC SINGLE MATERIAL RESPONSE OR ANSI/ASTM-A 493, TYPE 384 ASSN STD 1ST MATERIAL RESPONSE |
| Thread Length | 0.526 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL CORROSION RESISTING |
| Nonstandard Thread Pitch Diameter | +0.2460 TO 0.2490 INCHES IN |
| 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 | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.496 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 |
|---|---|
| NAS560CK4-32 | 3/2 Design control — primary reference U.S. Government activity |
| NAS560C4-32 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-503-0709 is a Screw,machine, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-503-0709: Fastener Length: 2.526 INCHES NOMINAL IN; Screw Material Document and Classification: QQ-S-763, CLASS 304, 321 OR 347, CONDITION A FED SPEC SINGLE MATERIAL RESPONSE OR ANSI/ASTM-A 493, TYPE 384 ASSN STD 1ST MATERIAL RESPONSE; Thread Length: 0.526 INCHES NOMINAL IN; Nominal Thread Diameter: 0.250 INCHES 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.