The Screw,machine, cataloged under National Stock Number 5305-00-252-9503, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-00-252-9503 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Screw Surface Treatment | NICKEL |
| Fastener Length | 2.156 INCHES MINIMUM AND 2.250 INCHES MAXIMUM IN |
| Screw Material Document and Classification | QQ-B-613 FED SPEC SINGLE MATERIAL RESPONSE AND QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE AND QQ-W-321 FED SPEC SINGLE MATERIAL RESPONSE |
| Thread Length | 1.750 INCHES MINIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Screw Material | COPPER ALLOY |
| Minimum Tensile Strength | 55000 POUNDS PER SQUARE INCH LBS |
| 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 | 20 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.452 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN |
| Screw Surface Treatment Document and Classification | QQ-N-290,CL 2,GR G FED SPEC 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 |
|---|---|
| 342-0251-000 | 5/2 Secondary reference U.S. Government activity |
| P342-0251-000 | 3/9 Design control — primary reference Allied Products Corp Pheoll Mfg Co Div |
| 342-0251-000 | 7/2 Vendor item drawing reference Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
NSN 5305-00-252-9503 is a Screw,machine, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-00-252-9503: Screw Surface Treatment: NICKEL; Fastener Length: 2.156 INCHES MINIMUM AND 2.250 INCHES MAXIMUM IN; Screw Material Document and Classification: QQ-B-613 FED SPEC SINGLE MATERIAL RESPONSE AND QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE AND QQ-W-321 FED SPEC SINGLE MATERIAL RESPONSE; Thread Length: 1.750 INCHES MINIMUM IN. 16 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.