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National Stock Number:
5305-00-322-4451
Federal Supply Class:
5305
National Item Identification Number:
003224451
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:
| 311-22 | 21900 | FEDERAL DIV OF VICTOREEN INSTRUMENT CO INC |
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Techincal Specification:
| FASTENER LENGTH | 0.525 INCHES NOMINAL | | HEAD HEIGHT | 0.287 INCHES NOMINAL | | HEAD DIAMETER | 1.000 INCHES NOMINAL | | HEAD STYLE | KNURLED NO. 1 | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | NOMINAL THREAD DIAMETER | 0.500 INCHES | | POINT STYLE | FLAT | | SURFACE TREATMENT | ZINC OVERALL | | THREAD DIRECTION | RIGHT-HAND | | THREAD CLASS | 2A | | THREAD LENGTH | 0.525 INCHES MINIMUM | | THREAD SERIES DESIGNATOR | UNF | | THREAD QUANTITY PER INCH | 20 |
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