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National Stock Number:
5305-01-425-7715
Federal Supply Class:
5305
National Item Identification Number:
014257715
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:
| 13481257 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND | | 18084-1/4-20-SS-11 | 51506 | ACCURATE SCREW MACHINE CORP |
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Techincal Specification:
| COLOR | BLACK OVERALL | | FASTENER LENGTH | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM | | HEAD DIAMETER | 0.500 INCHES MINIMUM AND 0.520 INCHES MAXIMUM | | HEAD HEIGHT | 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM | | HEAD STYLE | KNURLED NO. 5 | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-764, CLASS 7, TY A FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 303 OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | OXIDE OVERALL | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.750 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 20 | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |
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