The Screw,machine, cataloged under National Stock Number 5305-01-332-7563, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Tecno Trade S.r.l.. Government technical data includes 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-332-7563 |
| Primary Part Number | NAS1801-4-9 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Tecno Trade S.r.l. |
| Status | ACTIVE |
| Head Height | 0.410 INCHES NOMINAL IN |
| Screw Surface Treatment | CADMIUM AND CHROMATE |
| Fastener Length | 0.546 INCHES MINIMUM AND 0.593 INCHES MAXIMUM IN |
| Screw Material Document and Classification | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S6049 MIL SPEC 2ND MATERIAL RESPONSE OR AMS-6322 ASSN STD 2ND MATERIAL RESPONSE |
| Thread Length | 0.491 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS1801 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Width Between Flats | 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN |
| Screw Material | STEEL COMP E4340 OR STEEL COMP 8740 |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Screw Surface Treatment Document and Classification | QQ-P-416,TYPE 2 CLASS 2 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 |
| Part Number | Manufacturer |
|---|---|
| NAS1801-4-9 | Tecno Trade S.r.l. (ITA) |
| NAS1801-4-9 | Leonardo Spa Helicopters Division - Production Site (ITA) |
| NAS1801-4-9 | Aertekno S.r.l. (ITA) |
| Reference | Meaning |
|---|---|
| 5305PL0671356 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| NAS1801-4-9 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-332-7563 is a Screw,machine, manufactured by Tecno Trade S.r.l., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-332-7563 has 3 manufacturer part numbers on file: NAS1801-4-9 (Tecno Trade S.r.l.), NAS1801-4-9 (Leonardo Spa Helicopters Division - Production Site), NAS1801-4-9 (Aertekno S.r.l.).
Key specifications for NAS1801-4-9: Head Height: 0.410 INCHES NOMINAL IN; Screw Surface Treatment: CADMIUM AND CHROMATE; Fastener Length: 0.546 INCHES MINIMUM AND 0.593 INCHES MAXIMUM IN; Screw Material Document and Classification: MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S6049 MIL SPEC 2ND MATERIAL RESPONSE OR AMS-6322 ASSN STD 2ND MATERIAL RESPONSE. 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.