NSN 5306-01-517-8623

Part Details | CLOSE TOLERANCE BOLT

5306-01-517-8623 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: NAS8704U30, BACB30LL4U30, 5306-01-517-8623, 01-517-8623, 5306015178623, 015178623

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53FEB 23, 200401-517-862327851 ( BOLT, CLOSE TOLERANCE )
REFERENCE DRAWINGS & PICTURES

CROWNED HEXAGON

ROUND

Cross Reference | NSN 5306-01-517-8623
Part Number Cage Code Manufacturer
NAS8704U3081205THE BOEING COMPANYDBA BOEING
BACB30LL4U3081205THE BOEING COMPANYDBA BOEING
Technical Data | NSN 5306-01-517-8623
Characteristic Specifications
THREAD SERIES DESIGNATOR UNJF
NOMINAL THREAD DIAMETER0.250 INCHES
THREAD QUANTITY PER INCH28
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.370 INCHES NOMINAL
FASTENER LENGTH2.552 INCHES NOMINAL
HEAD STYLE6 CROWNED HEXAGON
HEAD DIAMETER0.355 INCHES MINIMUM AND 0.397 INCHES MAXIMUM
HEAD HEIGHT0.014 INCHES NOMINAL
COUNTERSINK ANGLE101.0 DEGREES NOMINAL
HOLE CONFIGURATION STYLE ROUND
HOLE TYPE DRILLED
HOLE QUANTITY1
GRIP LENGTH2.245 INCHES NOMINAL
GRIP DIAMETER0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM