NSN 5306-00-021-4897

Part Details | CLOSE TOLERANCE BOLT

5306-00-021-4897 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: 12W83137, 12W8313-7, 5306-00-021-4897, 00-021-4897, 5306000214897, 000214897

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53MAY 27, 196800-021-489727851 ( BOLT, CLOSE TOLERANCE )
REFERENCE DRAWINGS & PICTURES

HEXAGON

HEXAGON CORNERS

Cross Reference | NSN 5306-00-021-4897
Part Number Cage Code Manufacturer
12W8313-781755LOCKHEED MARTIN CORPORATIONDBA LOCKHEED MARTIN AERONAUTICS
Technical Data | NSN 5306-00-021-4897
Characteristic Specifications
THREAD SERIES DESIGNATOR UNJF
NOMINAL THREAD DIAMETER0.312 INCHES
THREAD QUANTITY PER INCH24
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.491 INCHES MINIMUM AND 0.501 INCHES MAXIMUM
FASTENER LENGTH0.731 INCHES MINIMUM AND 0.761 INCHES MAXIMUM
HEAD STYLE HEXAGON
HEAD HEIGHT0.156 INCHES MINIMUM AND 0.171 INCHES MAXIMUM
WIDTH BETWEEN FLATS0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM
HOLE CONFIGURATION STYLE HEXAGON CORNERS
HOLE TYPE DRILLED
HOLE QUANTITY3
HOLE DIAMETER0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM
GRIP LENGTH0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM
GRIP DIAMETER0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM