NSN 5305-00-021-7789

Part Details | CLOSE TOLERANCE SCREW

5305-00-021-7789 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: CA2730446, CA2730-4-46, AS1040446, AS104-04-46, CC00035446, CC00035-4-46, 5305-00-021-7789, 00-021-7789, 5305000217789, 000217789

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53JUN 26, 196800-021-778929294 ( SCREW, CLOSE TOLERANCE )
REFERENCE DRAWINGS & PICTURES

CROWNED HEXAGON

HEXAGON

Cross Reference | NSN 5305-00-021-7789
Part Number Cage Code Manufacturer
CA2730-4-4629372ARCONIC GLOBAL FASTENERS & RINGS,INC.
AS104-04-4684256AVIBANK MFG., INC.
CC00035-4-4681755LOCKHEED MARTIN CORPORATIONDBA LOCKHEED MARTIN AERONAUTICS
Technical Data | NSN 5305-00-021-7789
Characteristic Specifications
THREAD SERIES DESIGNATOR UNF
NOMINAL THREAD DIAMETER0.250 INCHES
THREAD QUANTITY PER INCH28
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.270 INCHES NOMINAL
FASTENER LENGTH3.313 INCHES MINIMUM AND 3.353 INCHES MAXIMUM
HEAD STYLE9 CROWNED HEXAGON
HEAD DIAMETER0.3737 INCHES MINIMUM AND 0.3742 INCHES MAXIMUM
HEAD HEIGHT0.253 INCHES MINIMUM AND 0.273 INCHES MAXIMUM
INTERNAL DRIVE STYLE HEXAGON
WIDTH ACROSS FLATS0.188 INCHES NOMINAL
GRIP LENGTH2.875 INCHES MINIMUM AND 2.895 INCHES MAXIMUM
GRIP DIAMETER0.2487 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM