5306-01-338-4012, BOLT,CLOSE TOLERANCE

National Stock Number:
5306-01-338-4012

Federal Supply Class:
5306

National Item Identification Number:
013384012

Description:
BOLT,CLOSE TOLERANCE

Detail:
An externally threaded fastener whose unthreaded portion is of a specified 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. 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. A locking feature may be incorporated in the design of the head or threads. For items having close tolerance, and fabricated from material having 160,000 pounds per square inch (1100 megapascals) minimum tensile strength, see BOLT, SHEAR. For items fabricated from material having less than 160,000 pounds per square inch (1100 megapascals) minimum tensile strength and not having a close tolerance, see BOLT, MACHINE.

Manufacturer Information:

MS27576-16-106	80205	NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE
MS27576-16-106	96906	MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

Techincal Specification:

DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	7.356 INCHES MINIMUM AND 7.361 INCHES MAXIMUM FIRST HOLE
FASTENER LENGTH	7.857 INCHES MINIMUM AND 7.877 INCHES MAXIMUM
FEATURES PROVIDED	COTTER PIN
GRIP DIAMETER	0.9982 INCHES MINIMUM AND 0.9991 INCHES MAXIMUM
GRIP LENGTH	6.625 INCHES MINIMUM AND 6.641 INCHES MAXIMUM
HARDNESS RATING	36.0 ROCKWELL C MINIMUM AND 41.0 ROCKWELL C MAXIMUM FASTENER
HEAD HEIGHT	0.147 INCHES MINIMUM AND 0.157 INCHES MAXIMUM
HEAD STYLE	CROWNED HEXAGON
LOCKING FEATURE	RETAINER FASTENER
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5643 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5644 ASSN STD 2ND MATERIAL RESPONSE OR QQ-S-763 FED SPEC 3RD MATERIAL RESPONSE LOCKING FEATUREAMS 5673 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A580 ASSN STD 2ND MATERIAL RESPONSE SPRING
MATERIAL	STEEL COMP 630 OR STEEL COMP 631 OR STEEL COMP 440C LOCKING FEATURESTEEL COMP 631 OR STEEL COMP 302 SPRINGSTEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 4130 OR STEEL COMP 8740 OR STEEL COMP 6150 FASTENER
MINIMUM TENSILE STRENGTH	95000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	1.000 INCHES
SHANK UNTHREADED HOLE DIAMETER	0.141 INCHES MINIMUM AND 0.151 INCHES MAXIMUM FIRST HOLE
WIDTH BETWEEN FLATS	1.427 INCHES MINIMUM AND 1.440 INCHES MAXIMUM
SURFACE FINISH	63.0 MICROINCHES BEARING SURFACE OF HEAD63.0 MICROINCHES GRIP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE LOCKING FEATUREQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE STAND-OFFQQ-P-416 TY 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE FASTENER
SURFACE TREATMENT	PASSIVATE LOCKING FEATUREPASSIVATE STAND-OFFCADMIUM AND CHROMATE FASTENER
THREAD DIRECTION	RIGHT-HAND
THREAD CLASS	3A
THREAD LENGTH	1.216 INCHES MINIMUM AND 1.252 INCHES MAXIMUM
THREAD SERIES DESIGNATOR	UNJF
THREAD QUANTITY PER INCH	12

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