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National Stock Number:
5306-01-493-5549
Federal Supply Class:
5306
National Item Identification Number:
014935549
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:
| 11829L4-12F | 59563 | REID PRODUCTS INC. | | 122897L4-12F | 0PTK6 | SPS TECHNOLOGIES INC | | AIC763L4-12F | 06725 | SPS TECHNOLOGIES, LLC | | GS1032-L4-12F | 1EM77 | B & B SPECIALTIES INC | | 122897L4-12F | 56878 | SPS TECHNOLOGIES, LLC | | 122897L4-12F | 80539 | SPS TECHNOLOGIES, LLC | | HP7753L4-12F | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | SLB255-L4-12F | 16258 | SPACE-LOK, INC. | | S343L4-12F | 17446 | HUCK INTERNATIONAL, INC | | ST3M753L4-12F | 1VSL7 | HOUSTON PRECISION FASTENERS I LP | | PBF1267L4-12F | 27624 | SPS TECHNOLOGIES LLC | | PFB1267L4-12F | 27624 | SPS TECHNOLOGIES LLC | | MB156L4-12F | 73197 | HI-SHEAR CORPORATION | | MB156L4-12F | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | VFK600L4-12F | 06710 | VALLEY-TODECO, INC. | | VS3190L4-12F | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | ST3M753L4-12F | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | ST3M753L4-12F | 76301 | THE BOEING COMPANY |
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Techincal Specification:
| EXTENDED WASHER THICKNESS | 0.036 INCHES NOMINAL | | EXTENDED WASHER DIAMETER | 0.470 INCHES NOMINAL | | FASTENER LENGTH | 1.218 INCHES NOMINAL | | GRIP DIAMETER | 0.248 INCHES NOMINAL | | GRIP LENGTH | 0.750 INCHES NOMINAL | | HEAD HEIGHT | 0.250 INCHES NOMINAL | | HEAD MINOR DIAMETER | 0.312 INCHES NOMINAL | | HEAD STYLE | SPLINE EXTENDED WASHER | | PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT-CLOSE TOLERANCE,SPLINE,FLANGE HEAD,220KSI FTU,CRES | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | NOMINAL THREAD DIAMETER | 0.062 INCHES | | SUPPLEMENTARY FEATURES | IVD COATING; DRY FILM LUBRICATION | | THREAD DIRECTION | RIGHT-HAND | | THREAD CLASS | 3A | | THREAD LENGTH | 0.468 INCHES NOMINAL | | THREAD SERIES DESIGNATOR | UNJF | | THREAD QUANTITY PER INCH | 28 |
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