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National Stock Number:
5306-00-678-9661
Federal Supply Class:
5306
National Item Identification Number:
006789661
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:
| 693077 | 99167 | HAMILTON SUNDSTRAND CORPORATION |
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Techincal Specification:
| FASTENER LENGTH | 0.953 INCHES MINIMUM AND 0.983 INCHES MAXIMUM | | GRIP DIAMETER | 0.4995 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM | | GRIP LENGTH | 0.183 INCHES MINIMUM AND 0.193 INCHES MAXIMUM | | HARDNESS RATING | 45.0 ROCKWELL C NOMINAL OVERALL | | HEAD HEIGHT | 0.204 INCHES MINIMUM AND 0.234 INCHES MAXIMUM | | HEAD STYLE | HEXAGON | | MATERIAL | STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP E4340 OR STEEL COMP 4340 OVERALL | | NOMINAL THREAD DIAMETER | 0.375 INCHES | | WIDTH BETWEEN FLATS | 0.620 INCHES MINIMUM AND 0.630 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.760 INCHES MINIMUM AND 0.800 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNF | | THREAD QUANTITY PER INCH | 24 |
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