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National Stock Number:
5306-66-137-5909
Federal Supply Class:
5306
National Item Identification Number:
661375909
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:
| 932.19.60.500 | S4080 | PILATUS AIRCRAFT LTD | | AN177C-15 | 88044 | AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE |
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Techincal Specification:
| FASTENER LENGTH | 1.703 INCHES MINIMUM AND 1.750 INCHES MAXIMUM | | GRIP DIAMETER | 0.4362 INCHES MINIMUM AND 0.4367 INCHES MAXIMUM | | GRIP LENGTH | 1.046 INCHES MINIMUM AND 1.078 INCHES MAXIMUM | | HEAD HEIGHT | 0.234 INCHES MINIMUM AND 0.266 INCHES MAXIMUM | | HEAD STYLE | HEXAGON | | HOLE CONFIGURATION STYLE | HEXAGON FLATS | | HOLE DIAMETER | 0.070 INCHES NOMINAL | | HOLE QUANTITY | 1 | | HOLE TYPE | DRILLED | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | NOMINAL THREAD DIAMETER | 0.437 INCHES | | SHANK UNTHREADED HOLE DIAMETER | 0.106 INCHES NOMINAL OVERALL | | SPECIFICATION/STANDARD DATA | 88044-AN177C-15 GOVERNMENT SPECIFICATION | | WIDTH BETWEEN FLATS | 0.615 INCHES MINIMUM AND 0.627 INCHES MAXIMUM | | SUPPLEMENTARY FEATURES | HARDNESS - NOT RATED | | SURFACE TREATMENT | CADMIUM OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.657 INCHES MINIMUM AND 0.672 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 20 | | THREAD SERIES DESIGNATOR | UNF | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.562 INCHES NOMINAL OVERALL |
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