NSN 5306-01-021-8358

Part Details | CLOSE TOLERANCE BOLT

5306-01-021-8358 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: A15D35501, A15D3550-1, 5306-01-021-8358, 01-021-8358, 5306010218358, 010218358

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53MAY 21, 197601-021-835827851 ( BOLT, CLOSE TOLERANCE )
REFERENCE DRAWINGS & PICTURES

HEXAGON

Cross Reference | NSN 5306-01-021-8358
Part Number Cage Code Manufacturer
A15D3550-177272THE BOEING COMPANYDBA BOEING
Technical Data | NSN 5306-01-021-8358
Characteristic Specifications
THREAD SERIES DESIGNATOR UNJF
NOMINAL THREAD DIAMETER0.250 INCHES
THREAD QUANTITY PER INCH28
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.390 INCHES MINIMUM AND 0.430 INCHES MAXIMUM
FASTENER LENGTH0.700 INCHES MINIMUM AND 0.720 INCHES MAXIMUM
MINIMUM TENSILE STRENGTH150000 POUNDS PER SQUARE INCH
HEAD STYLE HEXAGON
HEAD HEIGHT0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM
WIDTH BETWEEN FLATS0.438 INCHES NOMINAL
GRIP LENGTH0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM
GRIP DIAMETER0.2482 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM