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National Stock Number:
5306-01-581-6147
Federal Supply Class:
5306
National Item Identification Number:
015816147
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:
| BACB30LT3D25 | 81205 | THE BOEING COMPANY |
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Techincal Specification:
| FASTENER LENGTH | 2.022 INCHES MINIMUM AND 2.072 INCHES MAXIMUM | | GRIP DIAMETER | 0.1879 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM | | GRIP LENGTH | 1.552 INCHES MINIMUM AND 1.572 INCHES MAXIMUM | | HEAD HEIGHT | 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM | | HEAD STYLE | DOUBLE HEXAGON | | PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT, 12 POINT HEAD, SHORT THREAD, CLOSE TOL, A286 CRES, 110 KSI MIN SHEAR | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | MINIMUM TENSILE STRENGTH | 110000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | SPECIAL FEATURES | DRILLED SHANK HAVING NOMINAL HOLE DIAMETER OF 0.070 INCHES CENTERED APPROXIMATLY 0.117 INCHES FROM THREADED END | | WIDTH BETWEEN FLATS | 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | SURFACE FINISH | 32.0 MICROINCHES THREADS | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS QQ-P-416, TY 2, CL 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.340 INCHES MINIMUM AND 0.350 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 32 | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |
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