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National Stock Number:
5306-00-369-5679
Federal Supply Class:
5306
National Item Identification Number:
003695679
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:
| 4031720 | 0UCY9 | M.S. AEROSPACE INC. | | 4031720 | 77445 | RTX CORPORATION | | 4041720 | 4GP55 | ACUFAST AIRCRAFT PRODUCTS |
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Techincal Specification:
| FASTENER LENGTH | 0.850 INCHES MINIMUM AND 0.870 INCHES MAXIMUM | | GRIP LENGTH | 0.460 INCHES MINIMUM AND 0.470 INCHES MAXIMUM | | GRIP DIAMETER | 0.2480 INCHES MINIMUM AND 0.2490 INCHES MAXIMUM | | HARDNESS RATING | 241.0 BRINELL STANDARD MAXIMUM OVERALL | | HEAD HEIGHT | 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM | | HEAD STYLE | HEXAGON | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5758 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | NICKEL OVERALL | | MINIMUM TENSILE STRENGTH | 260000 POUNDS PER SQUARE INCH | | MINIMUM YIELD STRENGTH | 210000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | WIDTH BETWEEN FLATS | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.328 INCHES MINIMUM AND 0.348 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNJF | | THREAD QUANTITY PER INCH | 28 |
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