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National Stock Number:
5305-00-679-0837
Federal Supply Class:
5305
National Item Identification Number:
006790837
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:
| 9084389 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND | | 9084389 | 65814 | TRW INC HAND TOOLS DIV TRW INDUSTRIAL PRODUCTS GROUP |
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Techincal Specification:
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM | | FASTENER LENGTH | 0.609 INCHES MINIMUM AND 0.641 INCHES MAXIMUM | | FIRST DIAMETER FROM HEAD | 0.172 INCHES MINIMUM AND 0.204 INCHES MAXIMUM | | HEAD HEIGHT | 0.734 INCHES MINIMUM AND 0.766 INCHES MAXIMUM | | HEAD STYLE | WING NO. 2 | | MATERIAL | STEEL OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | POINT STYLE | FLAT | | WIDTH BETWEEN FLATS | 1.234 INCHES MINIMUM AND 1.266 INCHES MAXIMUM | | SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.468 INCHES MINIMUM AND 0.532 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNC | | THREAD QUANTITY PER INCH | 20 |
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