2010-01-464-4304 GEARCASE AND BEARIN Index 7643-01-464-4306 TOPOGRAPHIC GEOSPATIAL PRODUCTS

National Stock Number:
5305-01-464-4305

Federal Supply Class:
5305

National Item Identification Number:
014644305

Description:
SCREW,CAP,HEXAGON HEAD

Detail:
An externally threaded fastener designed for insertion into holes in assembled parts, for mating with a preformed internal thread and for tightening or releasing by torquing the head. The threaded and unthreaded portions are both of the same nominal diameter of 0.190 inch (5 mm) or larger. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. The thread length being the controlled dimension, the grip length is not specified. A locking feature may be incorporated in the design of the head or threads. Excludes BOLT, MACHINE; BOLT, EXTERNALLY RELIEVED BODY; BOLT, INTERNAL WRENCHING; and SCREW, CAP, SOCKET HEAD.


Manufacturer Information:
B18.3.5M80204AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED
B1835B08025N80204AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED


Techincal Specification:
COUNTERSINK ANGLE90.0 DEGREES MINIMUM AND 92.0 DEGREES MAXIMUM
EXTERNAL THREAD TOLERANCE CLASS4H6H
FASTENER LENGTH25.0 MILLIMETERS NOMINAL
HEAD DIAMETER15.60 MILLIMETERS MINIMUM AND 17.92 MILLIMETERS MAXIMUM
HEAD STYLEFLAT COUNTERSUNK
MATERIALSTEEL OVERALL
NOMINAL THREAD DIAMETER8.0 MILLIMETERS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM B633 TY II FED STD SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTZINC AND CHROMATE OVERALL
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH25.0 MILLIMETERS NOMINAL
THREAD SERIES DESIGNATORM
THREAD PITCH IN MILLIMETERS1.25


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