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National Stock Number:
5306-01-185-7128
Federal Supply Class:
5306
National Item Identification Number:
011857128
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:
| 123593 | 80539 | SPS TECHNOLOGIES, LLC | | AIC4698-07-12 | 06725 | SPS TECHNOLOGIES, LLC | | VS3324-07012 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | C9698-07012 | 4GP55 | ACUFAST AIRCRAFT PRODUCTS | | C9698-07012 | 81755 | LOCKHEED MARTIN CORPORATION | | VS3324-07012 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.438 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.966 INCHES NOMINAL | | FASTENER LENGTH | 1.701 INCHES MINIMUM AND | | 1.731 INCHES MAXIMUM | | MATERIAL | STEEL COMP H11 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM AND | | CHROMATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-8837,TY 2,CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | HARDNESS RATING | 46.0 ROCKWELL C MINIMUM AND | | 50.0 ROCKWELL C MAXIMUM OVERALL | | MINIMUM TENSILE STRENGTH | 220000 POUNDS PER SQUARE INCH | | HEAD STYLE | SPLINE EXTENDED WASHER | | HEAD HEIGHT | 0.320 INCHES MINIMUM AND | | 0.340 INCHES MAXIMUM | | WIDTH BETWEEN FLATS | 0.514 INCHES MINIMUM AND | | 0.521 INCHES MAXIMUM | | EXTENDED WASHER DIAMETER | 0.807 INCHES MINIMUM AND | | 0.817 INCHES MAXIMUM | | EXTENDED WASHER THICKNESS | 0.053 INCHES MINIMUM AND | | 0.073 INCHES MAXIMUM | | GRIP LENGTH | 0.750 INCHES NOMINAL | | GRIP DIAMETER | 0.4360 INCHES MINIMUM AND | | 0.4370 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | 32.0 MICROINCHES GRIP |
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