5306-00-420-5840, BOLT,EXTERNALLY RELIEVED BODY

National Stock Number:
5306-00-420-5840

Federal Supply Class:
5306

National Item Identification Number:
004205840

Description:
BOLT,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 undercuts for thread relief). It is No. 10 (0.190 IN.) (5 mm) or larger in size and has a head which is not designed to be held or driven with an inserted driver or designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Excludes BOLT, INTERNAL WRENCHING and THUMBSCREW. See also SCREW, EXTERNALLY RELIEVED BODY.

Manufacturer Information:

5931	62983	EATON AEROSPACE, LLC
5931	90166	EATON AEROSPACE, LLC

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.240 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	0.320 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER	0.425 INCHES NOMINAL
EXTENDED WASHER DIAMETER	0.357 INCHES MINIMUM AND 0.359 INCHES MAXIMUM
EXTENDED WASHER THICKNESS	0.050 INCHES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	3
FASTENER LENGTH	0.605 INCHES NOMINAL
FIRST DIAMETER FROM HEAD	0.248 INCHES MINIMUM AND 0.250 INCHES MAXIMUM
HARDNESS RATING	36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
HEAD HEIGHT	0.240 INCHES NOMINAL
HEAD STYLE	HEXAGON EXTENDED WASHER
MATERIAL	STEEL CORROSION RESISTING OVERALL
NOMINAL THREAD DIAMETER	0.312 INCHES
SECOND DIAMETER FROM HEAD	0.562 INCHES NOMINAL
WIDTH BETWEEN FLATS	0.305 INCHES MINIMUM AND 0.310 INCHES MAXIMUM
SURFACE TREATMENT	PASSIVATE OVERALL
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THIRD DIAMETER FROM HEAD	0.305 INCHES MINIMUM AND 0.312 INCHES MAXIMUM
THREAD LENGTH	0.190 INCHES MINIMUM
THREAD SERIES DESIGNATOR	UNF
THREAD QUANTITY PER INCH	24

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