NSN 5305-01-226-3570

Part Details | CLOSE TOLERANCE SCREW

5305-01-226-3570 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: CA21017410, CA21017-4-10, LE11100014010, LE111-0001-4010, LE11100014010, LE111-0001-4010, FIT0100014010, FIT01-0001-4010, 5305-01-226-3570, 01-226-3570, 5305012263570, 012263570

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53FEB 15, 198601-226-357029294 ( SCREW, CLOSE TOLERANCE )
REFERENCE DRAWINGS & PICTURES

DISHED HEXAGON

HEXAGON

Cross Reference | NSN 5305-01-226-3570
Part Number Cage Code Manufacturer
CA21017-4-1029372ARCONIC GLOBAL FASTENERS & RINGS,INC.
LE111-0001-401043999BOEING COMPANY, THEDBA BOEING
LE111-0001-401058998FASTENER INNOVATION TECHNOLOGY, INC.DBA F I T
FIT01-0001-401058998FASTENER INNOVATION TECHNOLOGY, INC.DBA F I T
Technical Data | NSN 5305-01-226-3570
Characteristic Specifications
THREAD SERIES DESIGNATOR UNJF
NOMINAL THREAD DIAMETER0.250 INCHES
THREAD QUANTITY PER INCH28
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.516 INCHES MINIMUM AND 0.556 INCHES MAXIMUM
FASTENER LENGTH1.151 INCHES MINIMUM AND 1.171 INCHES MAXIMUM
MINIMUM TENSILE STRENGTH18000 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 FLATS0.1565 INCHES MINIMUM AND 0.1587 INCHES MAXIMUM
GRIP LENGTH0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM
GRIP DIAMETER0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
SPECIAL FEATURES3 KEYWAYS 1.131 INCH NOM LENGTH 0.040 INCH MIN AND 0.044 INCH MAX WIDE MACHINED IN SHANK. BORE MACHINED IN THREAD END TO RECEIVE PLUG