5305-00-638-6307 THUMBSCREW Index 5305-00-638-6326 THUMBSCREW

National Stock Number:
5305-00-638-6308

Federal Supply Class:
5305

National Item Identification Number:
006386308

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).


Manufacturer Information:
167N46825500LOCKHEED MARTIN CORPORATION


Techincal Specification:
FASTENER LENGTH1.375 INCHES MINIMUM AND 1.438 INCHES MAXIMUM
HEAD HEIGHT0.875 INCHES NOMINAL
HEAD STYLETHUMB NO. 4
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-7720 MIL SPEC ALL MATERIAL RESPONSES OVERALL
NOMINAL THREAD DIAMETER0.3125 INCHES
POINT STYLEFLAT
WIDTH BETWEEN FLATS1.188 INCHES NOMINAL
THREAD CLASS2A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.375 INCHES MINIMUM AND 0.437 INCHES MAXIMUM
THREAD QUANTITY PER INCH18
THREAD SERIES DESIGNATORUNC


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