Part Details | THUMBSCREW
5305-00-639-0521 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: 681166, 8393223, P9419R, 5305-00-639-0521, 00-639-0521, 5305006390521, 006390521
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 53 | JAN 01, 1963 | 00-639-0521 | 06673 ( THUMBSCREW ) |
REFERENCE DRAWINGS & PICTURES
HEXAGON EXTENDED WASHER
FLAT
Cross Reference | NSN 5305-00-639-0521
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 681166 | 24617 | GENERAL MOTORS CORP |
| 8393223 | 19207 | U S ARMY TANK AUTOMOTIVE COMMANDAMSTA-IM-MM |
| P9419R | 45722 | USM CORPSUB OF EMHART INDUSTRIES INC |
Technical Data | NSN 5305-00-639-0521
| 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 | 0.875 INCHES MINIMUM |
| FASTENER LENGTH | 0.980 INCHES MINIMUM AND 1.020 INCHES MAXIMUM |
| HEAD STYLE | 9 HEXAGON EXTENDED WASHER |
| HEAD HEIGHT | 0.605 INCHES MINIMUM AND 0.635 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.521 INCHES MINIMUM AND 0.551 INCHES MAXIMUM |
| POINT STYLE | 9 FLAT |
| SPECIAL FEATURES | ASSEMBLED W/WASHER 1/4 IN. ID,0.620 IN. OD,0.050 IN. PORM 0.010 THK |