5310-00-670-8520 WASHER,KEY Index 5306-00-670-8531 BOLT,TORSION

National Stock Number:
5306-00-670-8521

Federal Supply Class:
5306

National Item Identification Number:
006708521

Description:
BOLT,INTERNALLY RELIEVED BODY

Detail:
An externally threaded fastener whose external threaded portion is of one nominal diameter. It has a concentric hole along the longitudinal centerline which may extend a part or the full length of the bolt. The concentric hole along the centerline may be counterbored and/or internally threaded at the head end or the bolt end. The head is designed to be held or driven by an external and/or internal driver. For items having a hole(s) perpendicular to the axis which meet the concentric hole along the longitudinal centerline, see BOLT, FLUID PASSAGE.


Manufacturer Information:
679274524617GENERAL MOTORS CORP
679274563005ROLLS-ROYCE CORPORATION
679274573342ALLISON TRANSMISSION INC


Techincal Specification:
CONCENTRIC HOLE DEPTH0.203 INCHES NOMINAL
CONCENTRIC HOLE DIAMETER0.185 INCHES MINIMUM AND 0.192 INCHES MAXIMUM
FASTENER LENGTH0.683 INCHES MINIMUM AND 0.693 INCHES MAXIMUM
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
HEAD HEIGHT0.130 INCHES MINIMUM AND 0.135 INCHES MAXIMUM
HEAD STYLEHEXAGON
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5613 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 410 OVERALL
NOMINAL THREAD DIAMETER0.312 INCHES
WIDTH BETWEEN FLATS0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM
STYLE DESIGNATORCONCENTRIC HOLE UNTHREADED
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.355 INCHES MINIMUM AND 0.365 INCHES MAXIMUM
THREAD QUANTITY PER INCH24
THREAD SERIES DESIGNATORUNF


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