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National Stock Number:
5306-01-303-0919
Federal Supply Class:
5306
National Item Identification Number:
013030919
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.
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Manufacturer Information:
| 10087962 | A486G | NIMIKKEISTOKESKUS NCB FINLAND | | NA0036-120032 | 80205 | NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | MJ | | NOMINAL THREAD DIAMETER | 12.0 MILLIMETERS | | THREAD PITCH IN MILLIMETERS | 1.25 | | EXTERNAL THREAD TOLERANCE CLASS | 4H6H | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 15.5 MILLIMETERS MINIMUM AND | | 16.5 MILLIMETERS MAXIMUM | | FASTENER LENGTH | 47.7 MILLIMETERS MINIMUM AND | | 48.3 MILLIMETERS MAXIMUM | | MATERIAL | STEEL COMP 4340 OR | | STEEL COMP 8740 OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY II,CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | MINIMUM TENSILE STRENGTH | 1100 MEGAPASCALS | | HEAD STYLE | DISHED HEXAGON | | HEAD HEIGHT | 5.7 MILLIMETERS MINIMUM AND | | 6.0 MILLIMETERS MAXIMUM | | WIDTH BETWEEN FLATS | 18.67 MILLIMETERS MINIMUM AND | | 19.0 MILLIMETERS MAXIMUM | | GRIP LENGTH | 31.8 MILLIMETERS MINIMUM AND | | 32.2 MILLIMETERS MAXIMUM | | GRIP DIAMETER | 11.959 MILLIMETERS MINIMUM AND | | 11.984 MILLIMETERS MAXIMUM | | SURFACE FINISH | 0.8 MICROMETERS BEARING SURFACE OF HEAD | | 0.8 MICROMETERS GRIP | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 42.0 MILLIMETERS NOMINAL FIRST HOLE | | SHANK UNTHREADED HOLE DIAMETER | 2.40 MILLIMETERS MINIMUM AND | | 2.54 MILLIMETERS MAXIMUM FIRST HOLE |
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