Part Details | THUMBSCREW
5305-01-250-2491 An externally threaded fastener whose threaded portion is of one nominal diameter. It may have an unthreaded portion with a diameter less than, equal to, or greater than the diameter of the threaded portion. It has either a vertically flattened, circular knurled, or wing type head, all of which are designed for rotation by the thumb and fingers. For items having wrenching facilities such as socket recess, multiple spline or slot heads, use SCREW (as modified) or BOLT (as modified).
Alternate Parts: 240784, 240784, 5305-01-250-2491, 01-250-2491, 5305012502491, 012502491
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | FEB 26, 1987 | 01-250-2491 | 06673 ( THUMBSCREW ) |
REFERENCE DRAWINGS & PICTURES
FLAT
DOUBLE HEXAGON FLATS
Cross Reference | NSN 5305-01-250-2491
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 240784 | 09205 | LOCKHEED MARTIN CORPELECTRONICS AND MISSILES DIV |
| 240784 | 31095 | MILLIPART, INC. |
Technical Data | NSN 5305-01-250-2491
| Characteristic | Specifications |
|---|---|
| THREAD SERIES DESIGNATOR | UNRC |
| NOMINAL THREAD DIAMETER | 0.112 INCHES |
| THREAD QUANTITY PER INCH | 40 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.270 INCHES NOMINAL |
| FASTENER LENGTH | 0.600 INCHES NOMINAL |
| HEAD DIAMETER | 0.176 INCHES MINIMUM AND 0.183 INCHES MAXIMUM |
| HEAD HEIGHT | 0.083 INCHES MINIMUM AND 0.086 INCHES MAXIMUM |
| HOLE CONFIGURATION STYLE | 2 DOUBLE HEXAGON FLATS |
| HOLE DIAMETER | 0.036 INCHES NOMINAL |
| POINT STYLE | 6 FLAT |
| EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 2 |
| FIRST DIAMETER FROM HEAD | 0.081 INCHES NOMINAL |
| SECOND DIAMETER FROM HEAD | 0.112 INCHES NOMINAL |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.330 INCHES NOMINAL |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER | 0.600 INCHES NOMINAL |