5305-00-008-7867 SCREW,CAP,SOCKET HEAD Index 5305-00-008-7870 SCREW,CAP,SOCKET HEAD

National Stock Number:
5305-00-008-7868

Federal Supply Class:
5305

National Item Identification Number:
000087868

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:
SM-B-208666-1 & -281337W1D1 NATICK SOLDIER CENTER
SMB20866680063US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR


Techincal Specification:
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER1.796 INCHES MINIMUM AND 1.828 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY1
FASTENER LENGTH2.281 INCHES MINIMUM AND 2.312 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM
HEAD HEIGHT0.859 INCHES MINIMUM AND 0.891 INCHES MAXIMUM
HEAD STYLETHUMB NO. 3
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 304 OVERALL
NOMINAL THREAD DIAMETER0.250 INCHES
POINT STYLECONE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
THREAD CLASS2A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.453 INCHES MINIMUM AND 0.516 INCHES MAXIMUM
THREAD QUANTITY PER INCH20
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
WIDTH BETWEEN FLATS1.046 INCHES MINIMUM AND 1.078 INCHES MAXIMUM


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