The Thumbscrew, cataloged under National Stock Number 5305-01-250-2491, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Lockheed Martin Corp Electronics and Missiles Div. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-250-2491 |
| Primary Part Number | 240784 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | Lockheed Martin Corp Electronics and Missiles Div |
| Status | ACTIVE |
| Thread Length | 0.270 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Second Diameter From Head | 0.112 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.330 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-35,TYPE 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Surface Treatment | PASSIVATE OVERALL |
| First Diameter From Head | 0.081 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.600 INCHES NOMINAL IN |
| Thread Class | 3A A |
| Head Height | 0.083 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN |
| Thread Series Designator | UNRC |
| Hole Configuration Style | ROUND LONGITUDINAL HOLE |
| Fastener Length | 0.600 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Thread Quantity Per Inch | 40 |
| Hole Diameter | 0.036 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Point Style | CONE |
| Head Diameter | 0.176 INCHES MINIMUM AND 0.183 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 2 |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 5305-01-250-2491 is a Thumbscrew, manufactured by Lockheed Martin Corp Electronics and Missiles Div, classified under FSC 5305 (No Item Name Available). Status: active.
NSN 5305-01-250-2491 has 2 cross-referenced part numbers: 240784 (Lockheed Martin Corp Electronics and Missiles Div), 240784 (Millipart, Inc).
There is 1 known substitute for 5305-01-250-2491: 6550-00-890-1965. Verify interchangeability with system specifications before substitution.
Key specifications for 240784: Thread Length: 0.270 INCHES NOMINAL IN; Nominal Thread Diameter: 0.112 INCHES IN; Second Diameter From Head: 0.112 INCHES NOMINAL IN; Distance From Largest Bearing Surface of Head to End of First Diameter: 0.330 INCHES NOMINAL IN. 20 total characteristics are documented in the Federal Logistics Information System.