NSN 5306-00-321-9271

Part Details | CLOSE TOLERANCE BOLT

5306-00-321-9271 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: US3204510, US3204-5-10, ST3M453510, ST3M453-5-10, GS1016510, GS1016-5-10, ST3M453510, ST3M453-5-10, MB61510, MB61-5-10, BM17019510, BM17019-5-10, MB61510, MB61-5-10, 11825510, 11825-5-10, 109453510, 109453-5-10, 109453510, 109453-5-10, VAL23029510, VAL23029-5-10, 5306-00-321-9271, 00-321-9271, 5306003219271, 003219271

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53NOV 21, 197300-321-927127851 ( BOLT, CLOSE TOLERANCE )
REFERENCE DRAWINGS & PICTURES

DOUBLE HEXAGON

Cross Reference | NSN 5306-00-321-9271
Part Number Cage Code Manufacturer
US3204-5-1092215ARCONIC GLOBAL FASTENERS & RINGS,INC.
ST3M453-5-1006950ARCONIC GLOBAL FASTENERS & RINGS,INC.
GS1016-5-101EM77B & B SPECIALTIES INC.DBA G S AEROSPACE DIVISION DIV GS
ST3M453-5-1076301BOEING COMPANY, THEDBA BOEING
MB61-5-1073197HI-SHEAR CORPORATION
BM17019-5-1097928HUCK INTL INC
MB61-5-10L4528LISI AEROSPACE CANADA CORPDIV HI SHEAR HOLDINGS INC
11825-5-1059563REID PRODUCTS INC.DBA REID PRODUCTS
109453-5-1050392SPS TECHNOLOGIES INC
109453-5-1056878SPS TECHNOLOGIES, LLCDBA AEROSPACE DIVISION
VAL23029-5-1006710VALLEY-TODECO, INC.DBA ARCONIC FASTENING SYSTEMS AND
Technical Data | NSN 5306-00-321-9271
Characteristic Specifications
THREAD SERIES DESIGNATOR UNJF
NOMINAL THREAD DIAMETER0.312 INCHES
THREAD QUANTITY PER INCH24
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.441 INCHES MINIMUM AND 0.508 INCHES MAXIMUM
FASTENER LENGTH1.076 INCHES MINIMUM AND 1.123 INCHES MAXIMUM
HEAD STYLE DOUBLE HEXAGON
HEAD HEIGHT0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM
WIDTH BETWEEN FLATS0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM
GRIP LENGTH0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM
GRIP DIAMETER0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM