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National Stock Number:
5306-01-541-5260
Federal Supply Class:
5306
National Item Identification Number:
015415260
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:
| 3M1263-7-26 | 76301 | THE BOEING COMPANY | | 93784-7-26 | 56878 | SPS TECHNOLOGIES, LLC | | PBF1626-7-26 | 27624 | SPS TECHNOLOGIES LLC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.438 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.705 INCHES NOMINAL | | FASTENER LENGTH | 2.330 INCHES NOMINAL | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | MP35 PER ASM 5758 OR AMS 5844 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS -QQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE OVERALL | | MINIMUM TENSILE STRENGTH | 28340 POUNDS PER SQUARE INCH | | HEAD STYLE | SPLINE EXTENDED WASHER | | HEAD HEIGHT | 0.393 INCHES NOMINAL | | EXTENDED WASHER DIAMETER | 0.812 INCHES NOMINAL | | EXTENDED WASHER THICKNESS | 0.063 INCHES NOMINAL | | HEAD MINOR DIAMETER | 0.500 INCHES NOMINAL | | GRIP LENGTH | 1.625 INCHES NOMINAL | | GRIP DIAMETER | 0.436 INCHES MINIMUM AND | | 0.437 INCHES MAXIMUM | | SPECIAL FEATURES | NON-DRILLED SHANK; WRENCHING ELEMENT NO. 16 | | PART NAME ASSIGNED BY CONTROLLING AGENCY | INAVY: BOLT, MACHINE; DWG: BOLT - CLOSE TOLERANCE, SPLINE DRIVE, FLANGE HEAD (145 KSI FSU) CRES |
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