5306-01-004-1968, BOLT,EXTERNALLY RELIEVED BODY

5305-01-004-1967 SCREW,EXTERNALLY RELIEVED BODY

5305-01-004-1971 SCREW,CLOSE TOLERANCE

National Stock Number:
5306-01-004-1968

Federal Supply Class:
5306

National Item Identification Number:
010041968

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:

1286375-101	36659	LOCKHEED MARTIN CORP LOCKHEED MARTIN AERONAUTICAL SYSTEMS BURBANK OPNS
1286375-101	98897	LOCKHEED MARTIN CORP

Techincal Specification:

DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	5.760 INCHES NOMINAL FIRST HOLE
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	5.450 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	5.575 INCHES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	2
FASTENER LENGTH	5.880 INCHES NOMINAL
FIRST DIAMETER FROM HEAD	0.3732 INCHES MINIMUM AND 0.3743 INCHES MAXIMUM
HEAD HEIGHT	0.240 INCHES NOMINAL
HEAD STYLE	HEXAGON
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 630 OVERALL
MINIMUM TENSILE STRENGTH	155000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.250 INCHES
SECOND DIAMETER FROM HEAD	0.186 INCHES MINIMUM AND 0.196 INCHES MAXIMUM
SHANK UNTHREADED HOLE DIAMETER	0.075 INCHES MINIMUM AND 0.080 INCHES MAXIMUM FIRST HOLE
WIDTH BETWEEN FLATS	0.562 INCHES NOMINAL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	LC+76-1003,FSCM 36659 MFR REF SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	PASSIVATE OVERALL
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.290 INCHES MINIMUM AND 0.320 INCHES MAXIMUM
THREAD QUANTITY PER INCH	28
THREAD SERIES DESIGNATOR	UNJF

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