5895-00-863-9809 PANEL,CONTROL,ELECTRICAL-ELECTRO Index 5340-00-863-9812 MOUNTING,TRANSFORMER SUB-ASSEMBLY

National Stock Number:
5305-00-863-9811

Federal Supply Class:
5305

National Item Identification Number:
008639811

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:
CE21564398230NATIONAL SECURITY AGENCY


Techincal Specification:
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER0.720 INCHES MINIMUM AND 0.740 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER0.520 INCHES MINIMUM AND 0.540 INCHES MAXIMUM
FASTENER LENGTH1.210 INCHES MINIMUM AND 1.250 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD0.242 INCHES MINIMUM AND 0.258 INCHES MAXIMUM
HEAD DIAMETER0.995 INCHES MINIMUM AND 1.005 INCHES MAXIMUM
HEAD HEIGHT0.230 INCHES MINIMUM AND 0.250 INCHES MAXIMUM
HEAD STYLEKNURLED NO. 1
MATERIAL DOCUMENT AND CLASSIFICATIONAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 303 OVERALL
NOMINAL THREAD DIAMETER0.250 INCHES
POINT STYLECONE
SECOND DIAMETER FROM HEAD0.180 INCHES MINIMUM AND 0.190 INCHES MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
THREAD CLASS2A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.345 INCHES MINIMUM AND 0.405 INCHES MAXIMUM
THREAD QUANTITY PER INCH28
THREAD SERIES DESIGNATORUNF


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