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National Stock Number:
5305-00-870-3786
Federal Supply Class:
5305
National Item Identification Number:
008703786
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:
| 10113251-4 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND |
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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 | 0.312 INCHES MAXIMUM | | FASTENER LENGTH | 1.212 INCHES NOMINAL | | MATERIAL | STEEL COMP 303 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | HEAD STYLE | KNURLED NO. 4 | | HEAD DIAMETER | 0.500 INCHES NOMINAL | | HEAD HEIGHT | 0.600 INCHES NOMINAL | | POINT STYLE | CONE | | POINT LENGTH | 0.188 INCHES NOMINAL | | POINT DIAMETER | 0.175 INCHES NOMINAL | | POINT CHAMFER ANGLE | 85.0 DEGREES MINIMUM AND | | 95.0 DEGREES MAXIMUM | | SPECIAL FEATURES | 0.078 IN. SLOT THRU CENTER OF HEAD TO DEPTH OF 0.094 IN. |
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