5306-00-031-6357, BOLT,EXTERNALLY RELIEVED BODY

2840-00-031-6355 SEAL,AIR,AIRCRAFT GAS TURBINE ENGINE

National Stock Number:
5306-00-031-6357

Federal Supply Class:
5306

National Item Identification Number:
000316357

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:

212204	00088	ROYAL OAK GAGE INC
212204	77445	RTX CORPORATION
212204	93907	TEXTRON FASTENING SYSTEMS DBA DECORAH OPERATIONS TFS

Techincal Specification:

THREAD SERIES DESIGNATOR	UNF
NOMINAL THREAD DIAMETER	0.250 INCHES
THREAD QUANTITY PER INCH	28
THREAD CLASS	1A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.350 INCHES MINIMUM AND
	0.370 INCHES MAXIMUM
FASTENER LENGTH	1.700 INCHES MINIMUM AND
	1.720 INCHES MAXIMUM
MATERIAL	STEEL CORROSION RESISTING OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5616 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
HARDNESS RATING	30.0 ROCKWELL C MINIMUM AND
	38.0 ROCKWELL C MAXIMUM OVERALL
HEAD STYLE	HEXAGON
HEAD HEIGHT	0.180 INCHES MINIMUM AND
	0.200 INCHES MAXIMUM
WIDTH BETWEEN FLATS	0.555 INCHES MINIMUM AND
	0.564 INCHES MAXIMUM
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	1.590 INCHES MINIMUM AND
	1.610 INCHES MAXIMUM FIRST HOLE
SHANK UNTHREADED HOLE DIAMETER	0.065 INCHES MINIMUM AND
	0.075 INCHES MAXIMUM FIRST HOLE
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	3
FIRST DIAMETER FROM HEAD	0.372 INCHES MINIMUM AND
	0.373 INCHES MAXIMUM
SECOND DIAMETER FROM HEAD	0.210 INCHES MINIMUM AND
	0.230 INCHES MAXIMUM
THIRD DIAMETER FROM HEAD	0.372 INCHES MINIMUM AND
	0.373 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.130 INCHES MINIMUM AND
	0.150 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	1.060 INCHES MINIMUM AND
	1.100 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER	1.190 INCHES MINIMUM AND
	1.210 INCHES MAXIMUM

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