NSN 5306-01-497-3998
Part Details | CLOSE TOLERANCE BOLT
5306-01-497-3998 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: NAS10853P, NAS1085-3P, 5306-01-497-3998, 01-497-3998, 5306014973998, 014973998
Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
---|---|---|---|
53 | MAY 20, 2002 | 01-497-3998 | 27851 ( BOLT, CLOSE TOLERANCE ) |
REFERENCE DRAWINGS & PICTURES
CROWNED HEXAGON

Cross Reference | NSN 5306-01-497-3998
Part Number | Cage Code | Manufacturer |
---|---|---|
NAS1085-3P | 1E0F1 | ROLLS ROYCE CORP |
Technical Data | NSN 5306-01-497-3998
Characteristic | Specifications |
---|---|
THREAD SERIES DESIGNATOR | UNJF |
NOMINAL THREAD DIAMETER | 0.312 INCHES |
THREAD QUANTITY PER INCH | 24 |
THREAD CLASS | 3A |
THREAD DIRECTION | RIGHT-HAND |
THREAD LENGTH | 0.375 INCHES NOMINAL |
FASTENER LENGTH | 0.548 INCHES MINIMUM AND 0.578 INCHES MAXIMUM |
HEAD STYLE | 6 CROWNED HEXAGON |
HEAD DIAMETER | 0.578 INCHES NOMINAL |
HEAD HEIGHT | 0.140 INCHES NOMINAL |
COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
GRIP LENGTH | 0.187 INCHES NOMINAL |
GRIP DIAMETER | 0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM |
END ITEM IDENTIFICATION | KC-130J; KC-13J |
PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT, 100 DEG FLUSH HEAD "HI-TORQUE" RECESS TITANIUM ALLOY (SHORT THREAD) |