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National Stock Number:
5305-00-863-9811
Federal Supply Class:
5305
National Item Identification Number:
008639811
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:
| CE215643 | 98230 | NATIONAL SECURITY AGENCY |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNF | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.345 INCHES MINIMUM AND | | 0.405 INCHES MAXIMUM | | FASTENER LENGTH | 1.210 INCHES MINIMUM AND | | 1.250 INCHES MAXIMUM | | MATERIAL | STEEL COMP 303 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | KNURLED NO. 1 | | HEAD DIAMETER | 0.995 INCHES MINIMUM AND | | 1.005 INCHES MAXIMUM | | HEAD HEIGHT | 0.230 INCHES MINIMUM AND | | 0.250 INCHES MAXIMUM | | POINT STYLE | CONE | | FIRST DIAMETER FROM HEAD | 0.242 INCHES MINIMUM AND | | 0.258 INCHES MAXIMUM | | SECOND DIAMETER FROM HEAD | 0.180 INCHES MINIMUM AND | | 0.190 INCHES MAXIMUM | | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.520 INCHES MINIMUM AND | | 0.540 INCHES MAXIMUM | | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER | 0.720 INCHES MINIMUM AND | | 0.740 INCHES MAXIMUM |
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