NSN 5306-01-037-8903

Part Details | CLOSE TOLERANCE BOLT

5306-01-037-8903 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.

Alternate Parts: ST3M7296D31, ST3M729-6D31, ST3M7296D31, ST3M729-6D31, ST3M7296D31, ST3M729-6D31, ST3M7296D31, ST3M729-6D31, ST3M7296D31, ST3M729-6D31, ST3M7296D31, ST3M729-6D31, MB1456D31, MB145-6D31, ST3M7296D31, ST3M729-6D31, ST3M7296D31, ST3M729-6D31, MB1456D31, MB145-6D31, ST3M7296D31, ST3M729-6D31, ST3M7296D31, ST3M729-6D31, ST3M7296D31, ST3M729-6D31, ST3M7296D31, ST3M729-6D31, 5306-01-037-8903, 01-037-8903, 5306010378903, 010378903

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53MAR 26, 197701-037-890327851 ( BOLT, CLOSE TOLERANCE )
REFERENCE DRAWINGS & PICTURES

DOUBLE HEXAGON

Cross Reference | NSN 5306-01-037-8903
Part Number Cage Code Manufacturer
ST3M729-6D3192215ARCONIC GLOBAL FASTENERS & RINGS,INC.
ST3M729-6D3106950ARCONIC GLOBAL FASTENERS & RINGS,INC.
ST3M729-6D3176301BOEING COMPANY, THEDBA BOEING
ST3M729-6D3158998FASTENER INNOVATION TECHNOLOGY, INC.DBA F I T
ST3M729-6D310ZC92HEARTLAND PRECISION FASTENERS, INC.
ST3M729-6D3173197HI-SHEAR CORPORATION
MB145-6D3173197HI-SHEAR CORPORATION
ST3M729-6D3197928HUCK INTL INC
ST3M729-6D31L4528LISI AEROSPACE CANADA CORPDIV HI SHEAR HOLDINGS INC
MB145-6D31L4528LISI AEROSPACE CANADA CORPDIV HI SHEAR HOLDINGS INC
ST3M729-6D3156878SPS TECHNOLOGIES, LLCDBA AEROSPACE DIVISION
ST3M729-6D3180539SPS TECHNOLOGIES, LLCDBA AEROSPACE FASTENERS GROUP
ST3M729-6D3106725SPS TECHNOLOGIES, LLCDBA AIR INDUSTRIES
ST3M729-6D3106710VALLEY-TODECO, INC.DBA ARCONIC FASTENING SYSTEMS AND
Technical Data | NSN 5306-01-037-8903
Characteristic Specifications
THREAD SERIES DESIGNATOR UNJF
NOMINAL THREAD DIAMETER0.375 INCHES
THREAD QUANTITY PER INCH24
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.365 INCHES MINIMUM AND 0.432 INCHES MAXIMUM
FASTENER LENGTH2.313 INCHES MINIMUM AND 2.360 INCHES MAXIMUM
HEAD STYLE DOUBLE HEXAGON
HEAD HEIGHT0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM
WIDTH BETWEEN FLATS0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM
GRIP LENGTH1.928 INCHES MINIMUM AND 1.948 INCHES MAXIMUM
GRIP DIAMETER0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM