5305-01-010-2336 SETSCREW Index 5305-01-010-2338 THUMBSCREW

National Stock Number:
5305-01-010-2337

Federal Supply Class:
5305

National Item Identification Number:
010102337

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:
59513206481NORTHROP GRUMMAN SYSTEMS CORPORATION
59513213973LITTON SYSTEMS INC. DIV NAVIGATION SYSTEMS DIVISION
59513221530SPENCER INDUSTRIES INC


Techincal Specification:
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER0.470 INCHES MINIMUM AND 0.490 INCHES MAXIMUM
FASTENER LENGTH0.730 INCHES MINIMUM AND 0.770 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM
HEAD HEIGHT0.750 INCHES MINIMUM AND 0.780 INCHES MAXIMUM
HEAD STYLETHUMB NO. 3
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-7720 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 302 OVERALL
NOMINAL THREAD DIAMETER0.312 INCHES
POINT STYLEFLAT
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
THREAD CLASS2A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.240 INCHES MINIMUM AND 0.300 INCHES MAXIMUM
THREAD QUANTITY PER INCH24
THREAD SERIES DESIGNATORUNF
WIDTH BETWEEN FLATS0.667 INCHES MINIMUM AND 0.697 INCHES MAXIMUM


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