NSN 5306-00-306-4394

Part Details | CLOSE TOLERANCE BOLT

5306-00-306-4394 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: 340084917, 3400849-17, 5306-00-306-4394, 00-306-4394, 5306003064394, 003064394

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53OCT 12, 197300-306-439427851 ( BOLT, CLOSE TOLERANCE )
REFERENCE DRAWINGS & PICTURES

HEXAGON

HEXAGON FLATS

Cross Reference | NSN 5306-00-306-4394
Part Number Cage Code Manufacturer
3400849-1798897LOCKHEED MARTIN CORPORATIONDBA LOCKHEED MARTIN AERONAUTICS
Technical Data | NSN 5306-00-306-4394
Characteristic Specifications
THREAD SERIES DESIGNATOR UNF
NOMINAL THREAD DIAMETER0.375 INCHES
THREAD QUANTITY PER INCH24
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.609 INCHES MINIMUM AND 0.688 INCHES MAXIMUM
FASTENER LENGTH1.937 INCHES MINIMUM AND 1.984 INCHES MAXIMUM
HEAD STYLE HEXAGON
HEAD HEIGHT0.203 INCHES MINIMUM AND 0.235 INCHES MAXIMUM
WIDTH BETWEEN FLATS0.553 INCHES MINIMUM AND 0.565 INCHES MAXIMUM
HOLE CONFIGURATION STYLE HEXAGON FLATS
HOLE TYPE DRILLED
HOLE QUANTITY1
HOLE DIAMETER0.124 INCHES MINIMUM AND 0.129 INCHES MAXIMUM
GRIP LENGTH1.296 INCHES MINIMUM AND 1.328 INCHES MAXIMUM
GRIP DIAMETER0.3737 INCHES MINIMUM AND 0.3742 INCHES MAXIMUM