5306-01-198-8551, BOLT,CLOSE TOLERANCE

National Stock Number:
5306-01-198-8551

Federal Supply Class:
5306

National Item Identification Number:
011988551

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:

10087956	A486G	NIMIKKEISTOKESKUS NCB FINLAND
NA0036-060052	80205	NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE

Techincal Specification:

EXTERNAL THREAD TOLERANCE CLASS	4H6H
FASTENER LENGTH	61.70 MILLIMETERS MINIMUM AND 62.30 MILLIMETERS MAXIMUM
GRIP DIAMETER	5.9650 MILLIMETERS MINIMUM AND 5.9900 MILLIMETERS MAXIMUM
GRIP LENGTH	51.80 MILLIMETERS MINIMUM AND 52.20 MILLIMETERS MAXIMUM
HARDNESS RATING	36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
HEAD HEIGHT	3.2 MILLIMETERS MINIMUM AND 3.5 MILLIMETERS MAXIMUM
HEAD STYLE	UNDERCUT HEXAGON
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP E4340 OR STEEL COMP 8740 OVERALL
MINIMUM TENSILE STRENGTH	1100 MEGAPASCALS
NOMINAL THREAD DIAMETER	6.0 MILLIMETERS
SPECIFICATION/STANDARD DATA	80205-NA0036 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
WIDTH BETWEEN FLATS	9.78 MILLIMETERS MINIMUM AND 10.00 MILLIMETERS MAXIMUM
SURFACE FINISH	0.8 MICROMETERS THREADS
SURFACE FINISH	0.8 MICROMETERS BEARING SURFACE OF HEAD
SURFACE FINISH	0.8 MICROMETERS GRIP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM AND CHROMATE OVERALL
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	9.5 MILLIMETERS MINIMUM AND 10.5 MILLIMETERS MAXIMUM
THREAD SERIES DESIGNATOR	MJ
THREAD PITCH IN MILLIMETERS	1.0

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