5306-00-206-5570, BOLT,EXTERNALLY RELIEVED BODY

5305-00-206-5573 SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5306-00-206-5570

Federal Supply Class:
5306

National Item Identification Number:
002065570

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:

FF-S-85

81348

FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.250 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	1.688 INCHES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	2
FASTENER LENGTH	2.812 INCHES NOMINAL
FIRST DIAMETER FROM HEAD	0.432 INCHES MINIMUM AND 0.437 INCHES MAXIMUM
HARDNESS RATING	90.7 ROCKWELL B MAXIMUM OVERALL
HEAD HEIGHT	0.312 INCHES NOMINAL
HEAD STYLE	HEXAGON
MATERIAL DOCUMENT AND CLASSIFICATION	66 FED STD ALL MATERIAL RESPONSES OVERALL
MINIMUM YIELD STRENGTH	051000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.437 INCHES
SECOND DIAMETER FROM HEAD	0.390 INCHES MINIMUM AND 0.394 INCHES MAXIMUM
WIDTH BETWEEN FLATS	0.674 INCHES MINIMUM AND 0.688 INCHES MAXIMUM
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	1.125 INCHES MINIMUM
THREAD QUANTITY PER INCH	14
THREAD SERIES DESIGNATOR	UNC

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