The Setscrew, cataloged under National Stock Number 5305-01-018-2250, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Hamilton Sundstrand Corporation Dba Collins Aerospace. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-018-2250 |
| Primary Part Number | 581522 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| Width Across Flats | 0.125 INCHES MINIMUM AND 0.127 INCHES MAXIMUM IN |
| Fastener Length | 0.625 INCHES NOMINAL IN |
| Thread Length | 0.625 INCHES NOMINAL IN |
| Hardness Rating | 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AMS 5616 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEADLESS (SETSCREW) |
| Thread Direction | RIGHT-HAND |
| Point Style | OVAL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| 581522 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
NSN 5305-01-018-2250 is a Setscrew, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-018-2250 has 1 manufacturer part number on file: 581522 (Hamilton Sundstrand Corporation Dba Collins Aerospace).
Key specifications for 581522: Width Across Flats: 0.125 INCHES MINIMUM AND 0.127 INCHES MAXIMUM IN; Fastener Length: 0.625 INCHES NOMINAL IN; Thread Length: 0.625 INCHES NOMINAL IN; Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL. 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.