5306-01-285-4921, BOLT,SHEAR

National Stock Number:
5306-01-285-4921

Federal Supply Class:
5306

National Item Identification Number:
012854921

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:

MS21250H04011

96906

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

Techincal Specification:

EXTENDED WASHER DIAMETER	0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM
EXTENDED WASHER THICKNESS	0.059 INCHES MINIMUM AND 0.079 INCHES MAXIMUM
FASTENER LENGTH	1.189 INCHES MINIMUM AND 1.209 INCHES MAXIMUM
GRIP LENGTH	0.677 INCHES MINIMUM AND 0.697 INCHES MAXIMUM
GRIP DIAMETER	0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
HARDNESS RATING	39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
HEAD HEIGHT	0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM
HEAD STYLE	DOUBLE HEXAGON W/HOLE
HOLE CONFIGURATION STYLE	DOUBLE HEXAGON LONGITUDINAL HOLE
HOLE DIAMETER	0.032 INCHES MINIMUM AND 0.042 INCHES MAXIMUM
HOLE QUANTITY	4
HOLE TYPE	DRILLED
MATERIAL	STEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 8740 OR STEEL COMP 6150 OVERALL
MINIMUM TENSILE STRENGTH	180000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.250 INCHES
WIDTH BETWEEN FLATS	0.312 INCHES NOMINAL
SURFACE FINISH	32.0 MICROINCHES BEARING SURFACE OF HEAD
SURFACE FINISH	32.0 MICROINCHES GRIP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416 TY2 CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM AND CHROMATE OVERALL
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.492 INCHES MINIMUM AND 0.532 INCHES MAXIMUM
THREAD SERIES DESIGNATOR	UNJF
THREAD QUANTITY PER INCH	28

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