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National Stock Number:
5306-01-361-7057
Federal Supply Class:
5306
National Item Identification Number:
013617057
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:
| A78325-4H-8 | 56878 | SPS TECHNOLOGIES, LLC | | A78325-4H-8 | 94697 | MOOG INC |
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Techincal Specification:
| EXTENDED WASHER THICKNESS | 0.026 INCHES MINIMUM AND 0.046 INCHES MAXIMUM | | EXTENDED WASHER DIAMETER | 0.460 INCHES MINIMUM AND 0.470 INCHES MAXIMUM | | FASTENER LENGTH | 0.980 INCHES MINIMUM AND 1.000 INCHES MAXIMUM | | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | GRIP LENGTH | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM | | HEAD HEIGHT | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM | | HEAD MINOR DIAMETER | 0.318 INCHES MINIMUM AND 0.323 INCHES MAXIMUM | | HEAD STYLE | SPLINE EXTENDED WASHER | | HOLE CONFIGURATION STYLE | SPLINE | | HOLE DIAMETER | 0.095 INCHES MINIMUM AND 0.135 INCHES MAXIMUM | | HOLE QUANTITY | 4 | | HOLE TYPE | DRILLED | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | NICKEL ALLOY 718 OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD DIRECTION | RIGHT-HAND | | THREAD CLASS | 3A | | THREAD LENGTH | 0.495 INCHES MINIMUM AND 0.500 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNJF | | THREAD QUANTITY PER INCH | 28 |
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