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National Stock Number:
5305-00-645-9759
Federal Supply Class:
5305
National Item Identification Number:
006459759
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:
| 9077556 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND |
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Techincal Specification:
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.500 INCHES MINIMUM | | FASTENER LENGTH | 1.000 INCHES NOMINAL | | FIRST DIAMETER FROM HEAD | 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM | | HARDNESS RATING | 165.0 BRINELL STANDARD MINIMUM AND 179.0 BRINELL STANDARD MAXIMUM OVERALL | | HEAD HEIGHT | 0.750 INCHES NOMINAL | | HEAD STYLE | THUMB NO. 9 | | MATERIAL | COPPER ALLOY 952 OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | POINT STYLE | CONE | | WIDTH BETWEEN FLATS | 0.938 INCHES NOMINAL | | SURFACE TREATMENT | ENAMEL OVERALL | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.500 INCHES MINIMUM | | THREAD SERIES DESIGNATOR | UNC | | THREAD QUANTITY PER INCH | 20 |
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