5305-01-117-2388 SCREW,EXTERNALLY RELIEVED BODY Index 5305-01-117-2393 SETSCREW

National Stock Number:
5306-01-117-2392

Federal Supply Class:
5306

National Item Identification Number:
011172392

Description:
BOLT,MACHINE

Detail:
An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. The threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. For items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, BOLT, SHEAR. See also SCREW, CAP, HEXAGON HEAD and SCREW, MACHINE.


Manufacturer Information:
B1821BH025F088L80204AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED
FF-S-8581348FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC
MS90727-7L96906MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M


Techincal Specification:
FASTENER LENGTH0.844 INCHES MINIMUM AND 0.875 INCHES MAXIMUM
FEATURES PROVIDEDFINISHED HEAD
HARDNESS RATING32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
HEAD HEIGHT0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM
HEAD STYLEHEXAGON
LOCKING FEATUREPATCH OR STRIP THREADS
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A354, GRADE BD ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL OVERALL
MINIMUM YIELD STRENGTH120000 POUNDS PER SQUARE INCH
MINIMUM TENSILE STRENGTH150000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER0.250 INCHES
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM B633, TYPE 2 ASSN STD ALL TREATMENT RESPONSES OVERALL
SURFACE TREATMENTZINC AND CHROMATE OVERALL
THREAD CLASS2A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.755 INCHES MINIMUM AND 0.875 INCHES MAXIMUM
THREAD QUANTITY PER INCH28
THREAD SERIES DESIGNATORUNF
WIDTH BETWEEN FLATS0.428 INCHES MINIMUM AND 0.437 INCHES MAXIMUM


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