NSN 5305-01-308-2906

Part Details | CLOSE TOLERANCE SCREW

5305-01-308-2906 A SCREW, MACHINE or SCREW, CAP, SOCKET HEAD whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 IN.) (0.025 mm) or less of a specific diameter for items (1.000 IN.) (25 mm) or less in diameter. Items over (1.000 IN.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 IN.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 IN.) (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 designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

Alternate Parts: NAS160718, NAS1607-18, 5305-01-308-2906, 01-308-2906, 5305013082906, 013082906

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53SEP 27, 198901-308-290629294 ( SCREW, CLOSE TOLERANCE )
REFERENCE DRAWINGS & PICTURES

HEXAGON COUNTERSUNK

HIGH-TORQUE

Cross Reference | NSN 5305-01-308-2906
Part Number Cage Code Manufacturer
NAS1607-1880205NATIONAL AEROSPACE STANDARDSCOMMITTEE AEROSPACE INDUSTRIES
Technical Data | NSN 5305-01-308-2906
Characteristic Specifications
THREAD SERIES DESIGNATOR UNJF
NOMINAL THREAD DIAMETER0.4375 INCHES
THREAD QUANTITY PER INCH20
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.656 INCHES NOMINAL
FASTENER LENGTH1.766 INCHES MINIMUM AND 1.796 INCHES MAXIMUM
MINIMUM TENSILE STRENGTH160000 POUNDS PER SQUARE INCH
HEAD STYLE0 HEXAGON COUNTERSUNK
HEAD DIAMETER0.8884 INCHES NOMINAL
COUNTERSINK ANGLE99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
INTERNAL DRIVE STYLE HIGH-TORQUE
GRIP LENGTH1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM
GRIP DIAMETER0.4672 INCHES MINIMUM AND 0.4682 INCHES MAXIMUM
SPECIFICATION/STANDARD DATA80205-NAS1607 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD