NSN 5305-01-186-9288

Part Details | CLOSE TOLERANCE SCREW

5305-01-186-9288 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: CA21017406, CA21017-4-06, LE11100014006, LE111-0001-4006, FIT0100014006, FIT01-0001-4006, CA21017406, CA21017-4-06, 5305-01-186-9288, 01-186-9288, 5305011869288, 011869288

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53AUG 16, 198401-186-928829294 ( SCREW, CLOSE TOLERANCE )
REFERENCE DRAWINGS & PICTURES

DISHED HEXAGON

HEXAGON

Cross Reference | NSN 5305-01-186-9288
Part Number Cage Code Manufacturer
CA21017-4-0629372ARCONIC GLOBAL FASTENERS & RINGS,INC.
LE111-0001-400643999BOEING COMPANY, THEDBA BOEING
FIT01-0001-400658998FASTENER INNOVATION TECHNOLOGY, INC.DBA F I T
CA21017-4-0658998FASTENER INNOVATION TECHNOLOGY, INC.DBA F I T
Technical Data | NSN 5305-01-186-9288
Characteristic Specifications
THREAD SERIES DESIGNATOR UNJF
NOMINAL THREAD DIAMETER0.250 INCHES
THREAD QUANTITY PER INCH28
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.536 INCHES NOMINAL
FASTENER LENGTH0.901 INCHES MINIMUM AND 0.921 INCHES MAXIMUM
MINIMUM TENSILE STRENGTH160000 POUNDS PER SQUARE INCH
HEAD STYLE3 DISHED HEXAGON
HEAD DIAMETER0.477 INCHES MINIMUM AND 0.492 INCHES MAXIMUM
HEAD HEIGHT0.140 INCHES MINIMUM AND 0.150 INCHES MAXIMUM
INTERNAL DRIVE STYLE HEXAGON
WIDTH ACROSS FLATS0.157 INCHES MINIMUM AND 0.159 INCHES MAXIMUM
GRIP LENGTH0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM
GRIP DIAMETER0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
SPECIAL FEATURESTHREE KEYWAYS 0.042 IN. WIDE 0.808 TO 0.828 IN. LONG MACHINED IN BODY OF SCREW