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National Stock Number:
5305-01-378-3433
Federal Supply Class:
5305
National Item Identification Number:
013783433
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:
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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 | 1.266 INCHES NOMINAL | | FASTENER LENGTH | 1.500 INCHES NOMINAL | | MATERIAL | STEEL COMP 4140 OVERALL | | SURFACE TREATMENT | CHROMIUM HEAD | | OXIDE FASTENER | | COLOR | BLACK FASTENER | | HEAD STYLE | KNURLED NO. 5 | | HEAD DIAMETER | 1.000 INCHES NOMINAL | | HEAD HEIGHT | 0.718 INCHES NOMINAL | | POINT STYLE | UNIVERSAL | | POINT LENGTH | 0.234 INCHES NOMINAL | | POINT DIAMETER | 0.185 INCHES NOMINAL | | POINT SWIVEL INCLUDED ANGLE | 6.0 DEGREES NOMINAL |
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