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National Stock Number:
5305-00-535-8437
Federal Supply Class:
5305
National Item Identification Number:
005358437
Description:
THUMBSCREW
Detail:
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).
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Manufacturer Information:
| 8512799 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNC | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | THREAD QUANTITY PER INCH | 24 | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.500 INCHES NOMINAL | | FASTENER LENGTH | 2.063 INCHES NOMINAL | | MATERIAL | PLASTIC TOP OF HEAD | | COPPER ALLOY 360 FASTENER | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE FASTENER | | HEAD STYLE | KNURLED NO. 2 | | HEAD DIAMETER | 0.687 INCHES NOMINAL | | HEAD HEIGHT | 1.000 INCHES NOMINAL | | POINT STYLE | CONE | | FIRST DIAMETER FROM HEAD | 0.312 INCHES NOMINAL | | SECOND DIAMETER FROM HEAD | 0.140 INCHES NOMINAL | | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.188 INCHES NOMINAL | | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER | 1.375 INCHES NOMINAL | | SPECIAL FEATURES | SLOTTED PROTRUSION ON TOP OF HEAD 0.312 IN. DIA BY 0.125 IN. HIGH |
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