NSN 5305-00-281-8118

Part Details | CLOSE TOLERANCE SCREW

5305-00-281-8118 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: HT814047, HT8140-4-7, HT29547, HT295-4-7, HT814047, HT8140-4-7, HT814047, HT8140-4-7, ST3M45447, ST3M454-4-7, ST3M45447, ST3M454-4-7, HT29547, HT295-4-7, BM1901947, BM19019-4-7, BM1901947, BM19019-4-7, HT29547, HT295-4-7, 1190547, 11905-4-7, HT29547, HT295-4-7, ST3M45447, ST3M454-4-7, 10683047, 106830-4-7, ST3M45447, ST3M454-4-7, ST3M45447, ST3M454-4-7, 5305-00-281-8118, 00-281-8118, 5305002818118, 002818118

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53AUG 22, 197300-281-811829294 ( SCREW, CLOSE TOLERANCE )
REFERENCE DRAWINGS & PICTURES

HEXAGON COUNTERSUNK

HIGH-TORQUE

Cross Reference | NSN 5305-00-281-8118
Part Number Cage Code Manufacturer
HT8140-4-7C4293ALCOA FASTENING SYSTEMSFAIRCHILDFASTENERS EUROPE - VSD GMBH
HT295-4-7C4293ALCOA FASTENING SYSTEMSFAIRCHILDFASTENERS EUROPE - VSD GMBH
HT8140-4-792215ARCONIC GLOBAL FASTENERS & RINGS,INC.
HT8140-4-706950ARCONIC GLOBAL FASTENERS & RINGS,INC.
ST3M454-4-776301BOEING COMPANY, THEDBA BOEING
ST3M454-4-758998FASTENER INNOVATION TECHNOLOGY, INC.DBA F I T
HT295-4-773197HI-SHEAR CORPORATION
BM19019-4-717446HUCK INTERNATIONAL, INC.DBA ARCONIC FASTENING SYSTEMS AND
BM19019-4-797928HUCK INTL INC
HT295-4-7L4528LISI AEROSPACE CANADA CORPDIV HI SHEAR HOLDINGS INC
11905-4-759563REID PRODUCTS INC.DBA REID PRODUCTS
HT295-4-7R1120SATAIR A/S
ST3M454-4-70PTK6SPS TECHNOLOGIES INC
106830-4-750394SPS TECHNOLOGIES INC UNBRAKO DIV
ST3M454-4-780539SPS TECHNOLOGIES, LLCDBA AEROSPACE FASTENERS GROUP
ST3M454-4-760516WEST COAST AEROSPACE INC
Technical Data | NSN 5305-00-281-8118
Characteristic Specifications
THREAD SERIES DESIGNATOR UNJF
NOMINAL THREAD DIAMETER0.250 INCHES
THREAD QUANTITY PER INCH28
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.371 INCHES MINIMUM AND 0.438 INCHES MAXIMUM
FASTENER LENGTH0.819 INCHES MINIMUM AND 0.866 INCHES MAXIMUM
HEAD STYLE0 HEXAGON COUNTERSUNK
HEAD DIAMETER0.497 INCHES MINIMUM AND 0.507 INCHES MAXIMUM
COUNTERSINK ANGLE99.0 DEGREES MINIMUM AND 100.0 DEGREES MAXIMUM
INTERNAL DRIVE STYLE HIGH-TORQUE
GRIP LENGTH0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM
GRIP DIAMETER0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM