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National Stock Number:
5306-00-815-7944
Federal Supply Class:
5306
National Item Identification Number:
008157944
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:
| 809967-1 | 17772 | AERO ENGINEERING & MANUFACTURING COMPANY OF CALIFORNIA, LLC | | 809967-1 | 30205 | MERCER PRODUCTS & MANUFACTURING COMPANY | | 809967-1 | 52916 | CAPRICE ENGINEERING COMPANY, INC. | | AT-1-1/4 | 77445 | RTX CORPORATION | | 809967-1 | 98897 | LOCKHEED MARTIN CORP |
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Techincal Specification:
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.230 INCHES NOMINAL FIRST HOLE | | FASTENER LENGTH | 1.479 INCHES NOMINAL | | GRIP DIAMETER | 0.3108 INCHES MINIMUM AND 0.3117 INCHES MAXIMUM | | GRIP LENGTH | 0.948 INCHES NOMINAL | | HEAD DIAMETER | 0.750 INCHES NOMINAL | | HEAD HEIGHT | 0.204 INCHES NOMINAL | | HEAD STYLE | ROUND W/WRENCH FLATS | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6050,F4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 8630 OVERALL | | PROPRIETARY CHARACTERISTICS | PACS | | NOMINAL THREAD DIAMETER | 0.312 INCHES | | SHANK UNTHREADED HOLE DIAMETER | 0.068 INCHES MINIMUM FIRST HOLE AND 0.074 INCHES MAXIMUM FIRST HOLE | | SPECIAL FEATURES | FLATTED FILLISTER HEAD 0.750 IN. DIA BY 0.616 IN. W | | WIDTH BETWEEN FLATS | 0.616 INCHES NOMINAL | | SURFACE TREATMENT | CADMIUM GRIP AND CHROMATE GRIP | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.531 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 24 | | THREAD SERIES DESIGNATOR | UNF |
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