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National Stock Number:
5306-00-310-5756
Federal Supply Class:
5306
National Item Identification Number:
003105756
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:
| 106467-4-120 | 80539 | SPS TECHNOLOGIES, LLC | | 121673-4-120 | 80539 | SPS TECHNOLOGIES, LLC | | CA4510-4-120 | 29372 | HOWMET GLOBAL FASTENING SYSTEMS INC. | | MS27576-4-120 | 80205 | NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE | | AS194-4-120 | 84256 | AVIBANK MFG., INC. | | MS27576-4-120 | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M | | ST3M735-4-120 | 76301 | THE BOEING COMPANY | | ST3M735-4-120 | 80539 | SPS TECHNOLOGIES, LLC |
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Techincal Specification:
| FASTENER LENGTH | 7.918 INCHES MINIMUM AND 7.938 INCHES MAXIMUM | | GRIP DIAMETER | 0.2483 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM | | GRIP LENGTH | 7.500 INCHES MINIMUM AND 7.516 INCHES MAXIMUM | | HEAD HEIGHT | 0.126 INCHES MINIMUM AND 0.141 INCHES MAXIMUM | | HEAD STYLE | DISHED HEXAGON | | MINIMUM TENSILE STRENGTH | 95000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SPECIAL FEATURES | LOCKING ELEMENT ON SHANK | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.282 INCHES MINIMUM AND 0.333 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) | | THREAD QUANTITY PER INCH | 28 | | WIDTH BETWEEN FLATS | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM |
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