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National Stock Number:
5306-01-379-1480
Federal Supply Class:
5306
National Item Identification Number:
013791480
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:
| 3-56326-501 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | 3-56326-501 | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | 3-56326-501 | 16258 | SPACE-LOK, INC. | | 3-56326-501 | 17943 | FEDERAL MANUFACTURING CORP | | 3-56326-501 | 1RC86 | HOWMET GLOBAL FASTENING SYSTEMS INC | | 3-56326-501 | 27624 | SPS TECHNOLOGIES LLC | | 3-56326-501 | 56878 | SPS TECHNOLOGIES, LLC | | 3-56326-501 | 57928 | SONIC INDUSTRIES, INC. | | 3-56326-501 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | 3-56326-501 | 60516 | WEST COAST AEROSPACE, INC. | | 3-56326-501 | 73197 | HI-SHEAR CORPORATION | | 3-56326-501 | 76301 | THE BOEING COMPANY | | 3-56326-501 | 81205 | THE BOEING COMPANY |
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Techincal Specification:
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.960 INCHES NOMINAL FIRST HOLE | | CRITICALITY CODE JUSTIFICATION | ANEE | | FASTENER LENGTH | 1.120 INCHES NOMINAL | | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | GRIP LENGTH | 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM | | HEAD HEIGHT | 0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM | | HEAD STYLE | HEXAGON | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6050 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 2ND MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 8630 OR STEEL COMP 4130 OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SHANK UNTHREADED HOLE DIAMETER | 0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE | | WIDTH BETWEEN FLATS | 0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.320 INCHES NOMINAL | | THREAD SERIES DESIGNATOR | UNF | | THREAD QUANTITY PER INCH | 28 |
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