5306-00-791-7915, BOLT,EXTERNALLY RELIEVED BODY

9390-00-791-7943 NONMETALLIC SPECIAL SHAPED SECTI

National Stock Number:
5306-00-791-7915

Federal Supply Class:
5306

National Item Identification Number:
007917915

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:

75060

80254

TEXTRON LYCOMING INC WILLIAMSPORT PLANT

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIFTH DIAMETER	1.460 INCHES MINIMUM AND 1.480 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.100 INCHES MINIMUM AND 0.120 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FOURTH DIAMETER	0.850 INCHES MINIMUM AND 0.890 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER	0.480 INCHES MINIMUM AND 0.500 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	4
FASTENER LENGTH	2.076 INCHES MINIMUM AND 2.080 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.381 INCHES MINIMUM AND 0.382 INCHES MAXIMUM
FOURTH DIAMETER FROM HEAD	0.316 INCHES MINIMUM AND 0.321 INCHES MAXIMUM
HARDNESS RATING	36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
HEAD DIAMETER	0.550 INCHES MINIMUM AND 0.562 INCHES MAXIMUM
HEAD HEIGHT	0.173 INCHES MINIMUM AND 0.178 INCHES MAXIMUM
HEAD STYLE	FLAT CHAMFER
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-I-6868 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL OVERALL
NOMINAL THREAD DIAMETER	0.375 INCHES
SECOND DIAMETER FROM HEAD	0.316 INCHES MINIMUM AND 0.321 INCHES MAXIMUM
SURFACE TREATMENT	COPPER HEAD
THIRD DIAMETER FROM HEAD	0.381 INCHES MINIMUM AND 0.382 INCHES MAXIMUM
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.414 INCHES MINIMUM
THREAD SERIES DESIGNATOR	UNF
THREAD QUANTITY PER INCH	24

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