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National Stock Number:
5305-00-796-9579
Federal Supply Class:
5305
National Item Identification Number:
007969579
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:
| 8173505 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND |
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Techincal Specification:
| FASTENER LENGTH | 2.188 INCHES NOMINAL | | HEAD DIAMETER | 1.250 INCHES NOMINAL | | HEAD HEIGHT | 0.438 INCHES NOMINAL | | HEAD STYLE | KNURLED NO. 1 | | MATERIAL | STEEL COMP 303 OVERALL | | NOMINAL THREAD DIAMETER | 0.312 INCHES | | POINT CHAMFER ANGLE | 90.0 DEGREES MINIMUM | | POINT LENGTH | 0.156 INCHES NOMINAL | | POINT STYLE | CONE | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.844 INCHES NOMINAL | | THREAD SERIES DESIGNATOR | UNC | | THREAD QUANTITY PER INCH | 18 |
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