NSN 5305-01-173-5050

Part Details | CLOSE TOLERANCE SCREW

5305-01-173-5050 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: LD11100470407, LD111-0047-0407, 5305-01-173-5050, 01-173-5050, 5305011735050, 011735050

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53MAR 07, 198401-173-505029294 ( SCREW, CLOSE TOLERANCE )
REFERENCE DRAWINGS & PICTURES

CROWNED HEXAGON

CROSS RECESS TYPE II

Cross Reference | NSN 5305-01-173-5050
Part Number Cage Code Manufacturer
LD111-0047-040743999BOEING COMPANY, THEDBA BOEING
Technical Data | NSN 5305-01-173-5050
Characteristic Specifications
THREAD SERIES DESIGNATOR UNJF
NOMINAL THREAD DIAMETER0.250 INCHES
THREAD QUANTITY PER INCH28
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.397 INCHES NOMINAL
FASTENER LENGTH0.820 INCHES MINIMUM AND 0.850 INCHES MAXIMUM
HEAD STYLE6 CROWNED HEXAGON
HEAD DIAMETER0.397 INCHES NOMINAL
HEAD HEIGHT0.018 INCHES NOMINAL
COUNTERSINK ANGLE99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
INTERNAL DRIVE STYLE5 CROSS RECESS TYPE II
GRIP LENGTH0.438 INCHES NOMINAL
GRIP DIAMETER0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM