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National Stock Number:
5306-01-609-8273
Federal Supply Class:
5306
National Item Identification Number:
016098273
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:
| 3M1170D6-12A | 76301 | THE BOEING COMPANY |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.3750 INCHES | | THREAD QUANTITY PER INCH | 24 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.3735 INCHES MINIMUM AND | | 0.3765 INCHES MAXIMUM | | FASTENER LENGTH | 0.563 INCHES MINIMUM AND | | 0.593 INCHES MAXIMUM | | MATERIAL | STEEL COMP XM-13 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | MS5629 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MSEB46.1 NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.5504 INCHES MINIMUM AND | | 0.5604 INCHES MAXIMUM | | HEAD HEIGHT | 0.077 INCHES NOMINAL | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | HOLE TYPE | DRILLED | | HOLE DIAMETER | 0.106 INCHES NOMINAL | | GRIP LENGTH | 0.75 INCHES NOMINAL | | GRIP DIAMETER | 0.3740 INCHES MINIMUM AND | | 0.3745 INCHES MAXIMUM | | PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW, CLOSE TOLERANCE |
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