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National Stock Number:
5305-00-568-8571
Federal Supply Class:
5305
National Item Identification Number:
005688571
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:
| 8174345 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND |
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Techincal Specification:
| FASTENER LENGTH | 16.797 INCHES MINIMUM AND 16.828 INCHES MAXIMUM | | HEAD DIAMETER | 1.250 INCHES NOMINAL | | HEAD HEIGHT | 0.625 INCHES NOMINAL | | HEAD STYLE | KNURLED NO. 2 | | NOMINAL THREAD DIAMETER | 0.312 INCHES | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-764 FED SPEC 1ST MATERIAL RESPONSE OVERALL OR QQ-S-637 FED SPEC 2ND MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 416 OVERALL OR STEEL COMP 1117 OVERALL | | POINT CHAMFER ANGLE | 90.0 DEGREES NOMINAL | | POINT LENGTH | 0.125 INCHES NOMINAL | | POINT STYLE | FLAT | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.734 INCHES MINIMUM AND 0.766 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 18 | | THREAD SERIES DESIGNATOR | UNC |
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