5306-00-131-2599, BOLT,EXTERNALLY RELIEVED BODY

National Stock Number:
5306-00-131-2599

Federal Supply Class:
5306

National Item Identification Number:
001312599

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:

78027

80254

TEXTRON LYCOMING INC WILLIAMSPORT PLANT

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.630 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	1.094 INCHES MINIMUM AND 1.157 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER	1.469 INCHES MINIMUM AND 1.595 INCHES MAXIMUM
DISTANCE FROM CENTERLINE TO FLAT	0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	3
FASTENER LENGTH	2.270 INCHES MINIMUM
FIRST DIAMETER FROM HEAD	0.316 INCHES MINIMUM AND 0.321 INCHES MAXIMUM
HARDNESS RATING	30.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
HEAD DIAMETER	0.620 INCHES MINIMUM AND 0.630 INCHES MAXIMUM
HEAD HEIGHT	0.190 INCHES MINIMUM
HEAD STYLE	DEE
MATERIAL	STEEL COMP 8740 OVERALL
NOMINAL THREAD DIAMETER	0.375 INCHES
SECOND DIAMETER FROM HEAD	0.3805 INCHES MINIMUM AND 0.3810 INCHES MAXIMUM
SPECIAL FEATURES	THD POINT FLATTED TO 0.260 IN. W BY 0.160 IN. LG,TOP OF HEAD PARTIALLY BEVELED TO 30.0 DEG
THIRD DIAMETER FROM HEAD	0.3695 INCHES MINIMUM AND 0.3735 INCHES MAXIMUM
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.560 INCHES MINIMUM
THREAD SERIES DESIGNATOR	UNF
THREAD QUANTITY PER INCH	24

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