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National Stock Number:
5305-00-437-9467
Federal Supply Class:
5305
National Item Identification Number:
004379467
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:
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Techincal Specification:
| FASTENER LENGTH | 1.500 INCHES NOMINAL | | HEAD DIAMETER | 1.000 INCHES NOMINAL | | HEAD HEIGHT | 0.313 INCHES NOMINAL | | HEAD STYLE | KNURLED NO. 1 | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | POINT LENGTH | 0.063 INCHES NOMINAL | | POINT STYLE | DOG | | POINT DIAMETER | 0.156 INCHES NOMINAL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 1.198 INCHES MINIMUM | | THREAD QUANTITY PER INCH | 20 | | THREAD SERIES DESIGNATOR | UNC |
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