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National Stock Number:
5306-00-829-6856
Federal Supply Class:
5306
National Item Identification Number:
008296856
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:
| 204-011-166-001 | 97499 | BELL TEXTRON INC | | 204-011-166-007 | 97499 | BELL TEXTRON INC | | 204-011-166-7 | 27604 | DUNCAN INDUSTRIES, INC | | 204-011-166-1 | 80539 | SPS TECHNOLOGIES, LLC | | 204-011-166-1 | 97499 | BELL TEXTRON INC | | 204-011-166-1 | D0216 | GENERAL ATOMICS AEROTEC SYSTEMS GMBH | | 204-011-166-7 | 27624 | SPS TECHNOLOGIES LLC | | 204-011-166-7 | 97499 | BELL TEXTRON INC |
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Techincal Specification:
| FASTENER LENGTH | 3.750 INCHES NOMINAL | | GRIP DIAMETER | 0.8731 INCHES MINIMUM AND 0.8741 INCHES MAXIMUM | | GRIP LENGTH | 3.000 INCHES NOMINAL | | HEAD HEIGHT | 0.380 INCHES MINIMUM AND 0.410 INCHES MAXIMUM | | HEAD STYLE | UNDERCUT HEXAGON | | MATERIAL | STEEL OVERALL | | NOMINAL THREAD DIAMETER | 0.875 INCHES | | WIDTH BETWEEN FLATS | 1.239 INCHES MINIMUM AND 1.252 INCHES MAXIMUM | | THREAD DIRECTION | RIGHT-HAND | | THREAD CLASS | 3A | | THREAD LENGTH | 0.750 INCHES MINIMUM | | THREAD SERIES DESIGNATOR | UNF | | THREAD QUANTITY PER INCH | 14 |
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