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National Stock Number:
5306-01-622-5262
Federal Supply Class:
5306
National Item Identification Number:
016225262
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:
| BACB30LR4K7 | 06710 | VALLEY-TODECO, INC. | | BACB30LR4K7 | 06725 | SPS TECHNOLOGIES, LLC | | BACB30LR4K7 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30LR4K7 | 17446 | HUCK INTERNATIONAL, INC | | BACB30LR4K7 | 17943 | FEDERAL MANUFACTURING CORP | | BACB30LR4K7 | 1RC86 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30LR4K7 | 56878 | SPS TECHNOLOGIES, LLC | | BACB30LR4K7 | 81205 | THE BOEING COMPANY | | BACB30LR4K7 | 9N513 | VOI-SHAN/CHATSWORTH DIV OF VSI CORP SUB OF FAIRCHILD INDUSTRIES INC |
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Techincal Specification:
| PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT,100DEG HEAD,CROSS RECESS,LONG THD.,CLOSE TOL.,SELF-LOCKING AND NONLOCKING(NOMINAL AND OVERSIZE) | | PROPRIETARY CHARACTERISTICS | PACS | | NOMINAL THREAD DIAMETER | 0.2500 INCHES | | SPECIFICATION/STANDARD DATA | 81205-BACB30LR MANUFACTURERS STANDARD | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | SURFACE FINISH | 32.0 MICROINCHES THREADS | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | BMS10-85,TY I,CL A MFR REF SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | ALUMINUM OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.425 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 28 | | THREAD SERIES DESIGNATOR | UNJF | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM | | FASTENER LENGTH | 0.8475 INCHES MINIMUM AND 0.8775 INCHES MAXIMUM | | GRIP DIAMETER | 0.2481 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | GRIP LENGTH | 0.4275 INCHES MINIMUM AND 0.4475 INCHES MAXIMUM | | HEAD DIAMETER | 0.455 INCHES MINIMUM AND 0.510 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | MATERIAL DOCUMENT AND CLASSIFICATION | A-286 PER AMS5737 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | IRON ALLOY 660 OVERALL | | III INTERNAL DRIVE STYLE | CROSS RECESS TYPE III |
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