Part Details | THUMBSCREW
5305-00-721-8346 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: 8157901, 5305-00-721-8346, 00-721-8346, 5305007218346, 007218346
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | JAN 01, 1963 | 00-721-8346 | 06673 ( THUMBSCREW ) |
REFERENCE DRAWINGS & PICTURES
HEXAGON COUNTERSUNK UNDERCUT
FLAT
Cross Reference | NSN 5305-00-721-8346
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 8157901 | 18876 | U S ARMY AVIATION AND MISSILECOMMAND |
Technical Data | NSN 5305-00-721-8346
| Characteristic | Specifications |
|---|---|
| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.203 INCHES MINIMUM AND 0.234 INCHES MAXIMUM |
| FASTENER LENGTH | 0.703 INCHES MINIMUM AND 0.734 INCHES MAXIMUM |
| HEAD STYLE | 6 HEXAGON COUNTERSUNK UNDERCUT |
| HEAD DIAMETER | 0.734 INCHES MINIMUM AND 0.766 INCHES MAXIMUM |
| HEAD HEIGHT | 0.234 INCHES MINIMUM AND 0.266 INCHES MAXIMUM |
| POINT STYLE | 9 FLAT |
| EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 1 |
| FIRST DIAMETER FROM HEAD | 0.182 INCHES MINIMUM AND 0.187 INCHES MAXIMUM |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM |