5306-01-621-7746, BOLT,SHEAR

National Stock Number:
5306-01-621-7746

Federal Supply Class:
5306

National Item Identification Number:
016217746

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:

MS21250-05021

96906

MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

Techincal Specification:

THREAD SERIES DESIGNATOR	UNJF
NOMINAL THREAD DIAMETER	0.3125 INCHES
THREAD QUANTITY PER INCH	24
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.579 INCHES NOMINAL
FASTENER LENGTH	1.8915 INCHES NOMINAL
MATERIAL	STEEL COMP 4140 OR
	STEEL COMP 4340 OR
	STEEL COMP 8740 OR
	STEEL COMP 6150 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-5626 MIL SPEC SINGLE MATERIAL RESPONSE OR
	MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OR
	MIL-S-6049 MIL SPEC SINGLE MATERIAL RESPONSE OR
	MIL-S-8503 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416, TYPE II, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING	39.0 ROCKWELL C MINIMUM AND
	43.0 ROCKWELL C MAXIMUM OVERALL
MINIMUM TENSILE STRENGTH	11100 POUNDS PER SQUARE INCH
SINGLE SHEAR STRENGTH	8300 POUNDS PER SQUARE INCH
HEAD STYLE	DOUBLE HEXAGON W/HOLE
HEAD HEIGHT	0.348 INCHES NOMINAL
WIDTH BETWEEN FLATS	0.070 INCHES NOMINAL
EXTENDED WASHER DIAMETER	0.521 INCHES MINIMUM AND
	0.531 INCHES MAXIMUM
EXTENDED WASHER THICKNESS	0.082 INCHES NOMINAL
GRIP LENGTH	1.312 INCHES NOMINAL
GRIP DIAMETER	0.3110 INCHES MINIMUM AND
	0.3120 INCHES MAXIMUM
PART NAME ASSIGNED BY CONTROLLING AGENCY	BOLT
SPEC/STD CONTROLLING DATA
MANUFACTURERS CODE	96906
DEFINITIVE GOVERNMENT SPEC/STD REFERENCE	MS21250-05021

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