5305-01-240-1258, SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-01-240-1258

Federal Supply Class:
5305

National Item Identification Number:
012401258

Description:
SCREW,EXTERNALLY RELIEVED BODY

Detail:
An externally threaded fastener whose threaded portion is of one nominal diameter, and whose unthreaded portion has been machined or ground in one or more places or over its entire length to a maximum diameter less than the minimum pitch diameter of the thread (excludes undercut for thread relief). It is No. 0 (0.060 IN.) (1.5 mm) or larger, and is designed to be held or driven with either a wrench or inserted driver (excluding internal socket and multiple spline types) or both in sizes below No. 10 (0.190 IN.) (5 mm) and larger sizes must have a head designed for any type inserted driver (excluding internal socket and multiple spline types) but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. See also BOLT, EXTERNALLY RELIEVED BODY and BOLT, INTERNAL WRENCHING.

Manufacturer Information:

4069905219	64678	DAIMLER TRUCK NORTH AMERICA LLC
4069905219	CN7Z7	MERCEDES-BENZ AG
4069905219	D8046	DAIMLER AG

Techincal Specification:

WIDTH ACROSS FLATS	6.0 MILLIMETERS NOMINAL
SURFACE TREATMENT	PHOSPHATE OVERALL
THIRD DIAMETER FROM HEAD	8.4 MILLIMETERS NOMINAL
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	20.2 MILLIMETERS MINIMUM AND 21.1 MILLIMETERS MAXIMUM
THREAD SERIES DESIGNATOR	M
THREAD PITCH IN MILLIMETERS	1.25
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	4.5 MILLIMETERS MINIMUM AND 5.0 MILLIMETERS MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	37.5 MILLIMETERS MINIMUM AND 38.0 MILLIMETERS MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER	42.5 MILLIMETERS MINIMUM AND 43.0 MILLIMETERS MAXIMUM
EXTERNAL THREAD TOLERANCE CLASS	6G
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	63.20 MILLIMETERS MINIMUM AND 63.60 MILLIMETERS MAXIMUM
FIRST DIAMETER FROM HEAD	8.4 MILLIMETERS NOMINAL
HARDNESS RATING	34.0 ROCKWELL C MINIMUM OVERALL AND 44.0 ROCKWELL C MAXIMUM OVERALL
HEAD DIAMETER	13.0 MILLIMETERS NOMINAL
HEAD HEIGHT	5.0 MILLIMETERS NOMINAL
HEAD STYLE	FLAT CHAMFER
INTERNAL DRIVE STYLE	HEXAGON
MATERIAL	STEEL PROPERTY CLASS 12.9 OVERALL
PROPRIETARY CHARACTERISTICS	PACS
MINIMUM TENSILE STRENGTH	170000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	8.0 MILLIMETERS
SECOND DIAMETER FROM HEAD	5.4 MILLIMETERS MINIMUM AND 5.6 MILLIMETERS MAXIMUM
SPECIAL FEATURES	KNURL TWO LARGER SHOULDERS,8.4MM DIAMETERS

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