5305-01-080-0675 SETSCREW Index 5306-01-080-0677 BOLT,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-01-080-0676

Federal Supply Class:
5305

National Item Identification Number:
010800676

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:
600096729381GICHNER SYSTEMS GROUP, INC.
6000967-129381GICHNER SYSTEMS GROUP, INC.
FM-B-20866629381GICHNER SYSTEMS GROUP, INC.
SM-B-2086629381GICHNER SYSTEMS GROUP, INC.


Techincal Specification:
THREAD SERIES DESIGNATORUNC
NOMINAL THREAD DIAMETER0.250 INCHES
THREAD QUANTITY PER INCH20
THREAD CLASS2A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.469 INCHES MINIMUM AND
0.500 INCHES MAXIMUM
FASTENER LENGTH2.281 INCHES MINIMUM AND
2.312 INCHES MAXIMUM
MATERIALSTEEL COMP 304 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 TY 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HEAD STYLETHUMB NO. 4
HEAD HEIGHT0.875 INCHES NOMINAL
WIDTH BETWEEN FLATS1.062 INCHES NOMINAL
POINT STYLECONE
POINT LENGTH0.125 INCHES NOMINAL
POINT CHAMFER ANGLE90.0 DEGREES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY1
FIRST DIAMETER FROM HEAD0.170 INCHES MINIMUM AND
0.180 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER1.812 INCHES NOMINAL
THE MANUFACTURERS DATA
MANUFACTURERS CODE29381
DESIGN CONTROL REFERENCESM-B-20866


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