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National Stock Number:
5306-00-471-7874
Federal Supply Class:
5306
National Item Identification Number:
004717874
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:
| 99-6034725 | 99995 | NATO STOCK NUMBER ASSIGNED BY ANOTHER NATION | | F244951 | K0289 | BRITISH AEROSPACE MILITARY AIRCRAFT & AEROSTRUCTURES | | F244951 | U9143 | BAE SYSTEMS (OPERATIONS) LIMITED |
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Techincal Specification:
| FASTENER LENGTH | 0.843 INCHES MINIMUM AND 0.864 INCHES MAXIMUM | | GRIP LENGTH | 0.483 INCHES MINIMUM AND 0.513 INCHES MAXIMUM | | GRIP DIAMETER | 0.3118 INCHES MINIMUM AND 0.3123 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | S95B FSCM K0289 MFR REF SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL OVERALL | | NOMINAL THREAD DIAMETER | 0.312 INCHES | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.351 INCHES MINIMUM AND 0.360 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNF | | THREAD QUANTITY PER INCH | 24 |
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