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National Stock Number:
5306-01-392-3407
Federal Supply Class:
5306
National Item Identification Number:
013923407
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:
| 03A095-8-42 | 1W025 | NORTHROP GRUMMAN SYSTEMS CORP | | 03A095-8-42 | 76823 | NORTHROP GRUMMAN SYSTEMS CORPORATION | | LB58-8-42 | 73197 | HI-SHEAR CORPORATION | | AS402-8-42 | 84256 | AVIBANK MFG., INC. | | LB58-8-42 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.500 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.670 INCHES NOMINAL | | FASTENER LENGTH | 3.301 INCHES MINIMUM AND | | 3.321 INCHES MAXIMUM | | MATERIAL | NICKEL ALLOY 718 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | HEXAGON | | HEAD HEIGHT | 0.251 INCHES MINIMUM AND | | 0.266 INCHES MAXIMUM | | WIDTH BETWEEN FLATS | 0.741 INCHES MINIMUM AND | | 0.752 INCHES MAXIMUM | | GRIP LENGTH | 2.625 INCHES MINIMUM AND | | 2.641 INCHES MAXIMUM | | GRIP DIAMETER | 0.4986 INCHES MINIMUM AND | | 0.4991 INCHES MAXIMUM | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 3.295 INCHES NOMINAL FIRST HOLE | | SHANK UNTHREADED HOLE DIAMETER | 0.106 INCHES MINIMUM AND | | 0.116 INCHES MAXIMUM FIRST HOLE | | SPECIAL FEATURES | FURNISHED WITH CASTELLATED NUT RETAINING ELEMENT; RETAINING ELEMENT SHALL BE RELEASED ONLY BY DEPRESSING PLUNGER LOCATED IN THREAD END OF BOLT |
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