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National Stock Number:
5305-01-447-2065
Federal Supply Class:
5305
National Item Identification Number:
014472065
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:
| STD 864-2 | 81579 | MASON ELECTRIC CO. |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNC | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.247 INCHES MINIMUM AND | | 0.253 INCHES MAXIMUM | | FASTENER LENGTH | 0.247 INCHES MINIMUM AND | | 0.253 INCHES MAXIMUM | | MATERIAL | STEEL COMP 303 OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | HEAD STYLE | KNURLED NO. 1 | | HEAD DIAMETER | 0.750 INCHES NOMINAL | | HEAD HEIGHT | 0.064 INCHES NOMINAL |
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