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National Stock Number:
5306-00-801-9638
Federal Supply Class:
5306
National Item Identification Number:
008019638
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:
| 51B464-4A21 | 06725 | SPS TECHNOLOGIES, LLC | | 51B464-4A21 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | 51B464-4A21 | 0JRC1 | NORTHROP GRUMMAN TECHNICAL SERVICES, INC. | | 51B464-4A21 | 0JV78 | J M PRECISION INC | | 51B464-4A21 | 17446 | HUCK INTERNATIONAL, INC | | 51B464-4A21 | 27624 | SPS TECHNOLOGIES LLC | | 51B464-4A21 | 73197 | HI-SHEAR CORPORATION | | 51B464-4A21 | 76823 | NORTHROP GRUMMAN SYSTEMS CORPORATION | | 51B464-4A21 | 80539 | SPS TECHNOLOGIES, LLC | | 51B464-4A21 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | 51B464-4A21 | 97928 | HUCK INTL INC | | 51B464-4A21 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | 51B64-4A21 | 17446 | HUCK INTERNATIONAL, INC | | 51B64-4A21 | 5R793 | HOWMET GLOBAL FASTENING SYSTEMS INC |
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Techincal Specification:
| FASTENER LENGTH | 1.628 INCHES NOMINAL | | GRIP DIAMETER | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | GRIP LENGTH | 1.313 INCHES NOMINAL | | HARDNESS RATING | 36.0 ROCKWELL C MINIMUM OVERALL AND 40.0 ROCKWELL C MAXIMUM OVERALL | | HEAD HEIGHT | 0.125 INCHES NOMINAL | | HEAD STYLE | HEXAGON | | MATERIAL | STEEL COMP 4140 OVERALL | | PROPRIETARY CHARACTERISTICS | PACS | | MINIMUM TENSILE STRENGTH | 180000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | WIDTH BETWEEN FLATS | 0.438 INCHES NOMINAL | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2 CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL AND CHROMATE OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.316 INCHES MINIMUM | | THREAD QUANTITY PER INCH | 28 | | THREAD SERIES DESIGNATOR | UNF |
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