5306-01-469-6080, BOLT,SHEAR

National Stock Number:
5306-01-469-6080

Federal Supply Class:
5306

National Item Identification Number:
014696080

Description:
BOLT,SHEAR

Detail:
A high strength, 160,000 pounds per square inch (1100 megapascals) minimum tensile strength externally threaded fastener designed for use in applications involving great shear stress. The head is designed to accommodate an external wrench or driver. The head is not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. The unthreaded portion is of specific grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the Screw Thread Standards, FED STD H28 and/or other nationally recognized standards. A locking feature may be incorporated in the design of the head or threads. See BOLT, MACHINE and BOLT, CLEVIS.

Manufacturer Information:

SS27576-6-74

78286

SIKORSKY AIRCRAFT CORPORATION

Techincal Specification:

THREAD SERIES DESIGNATOR	UNJF
NOMINAL THREAD DIAMETER	0.373 INCHES
THREAD QUANTITY PER INCH	24
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.377 INCHES MINIMUM AND
	0.419 INCHES MAXIMUM
FASTENER LENGTH	5.164 INCHES MINIMUM AND
	5.184 INCHES MAXIMUM
MATERIAL	STEEL COMP 4340 OVERALL
	STEEL CORROSION RESISTING LOCKING FEATURE
	STEEL COMP 302 OR
	STEEL COMP 304 OR
	STEEL COMP 631 SPRING
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-8844,CLASS I MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
	MIL-B-83050 MIL SPEC SINGLE MATERIAL RESPONSE LOCKING FEATURE
	QQ-W-423 FED SPEC SINGLE MATERIAL RESPONSE OR
	AMS5678 ASSN STD SINGLE MATERIAL RESPONSE SPRING
SURFACE TREATMENT	CADMIUM OVERALL
	PASSIVATE LOCKING FEATURE
	PASSIVATE SPRING
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	AMS2501-3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE LOCKING FEATURE
HARDNESS RATING	36.0 ROCKWELL C MINIMUM AND
	41.0 ROCKWELL C MAXIMUM OVERALL
	56.0 ROCKWELL C MINIMUM AND
	60.0 ROCKWELL C MAXIMUM LOCKING FEATURE
MINIMUM TENSILE STRENGTH	11540 POUNDS PER SQUARE INCH
HEAD STYLE	CROWNED HEXAGON
HEAD HEIGHT	0.189 INCHES MINIMUM AND
	0.204 INCHES MAXIMUM
WIDTH BETWEEN FLATS	0.553 INCHES MINIMUM AND
	0.564 INCHES MAXIMUM
GRIP LENGTH	4.625 INCHES MINIMUM AND
	4.641 INCHES MAXIMUM
GRIP DIAMETER	0.120 INCHES MINIMUM AND
	0.166 INCHES MAXIMUM
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	5.059 INCHES MINIMUM AND
	5.069 INCHES MAXIMUM FIRST HOLE
SHANK UNTHREADED HOLE DIAMETER	0.106 INCHES MINIMUM AND
	0.116 INCHES MAXIMUM FIRST HOLE
SPECIAL FEATURES	FOR USE IN CRITICAL APPLICATIONS; USED AS: BOLT, SELF-RETAINING,IMPEDANCE TYPE, 95KSI FSU, HEX HEAD, 450F; USE MS21244 NUTS WITH THESE BOLTS
CRITICALITY CODE JUSTIFICATION	FEAT
THE MANUFACTURERS DATA
MANUFACTURERS CODE	78286
DESIGN CONTROL REFERENCE	SS27576-6-74

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