NSN 5305-00-283-7505

Part Details | CLOSE TOLERANCE SCREW

5305-00-283-7505 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: ST3M547421, ST3M547-4-21, HT308421, HT308-4-21, HS26234Z21, HS2623-4Z21, HT308421, HT308-4-21, 66904H421, 66904H4-21, 66904H421, 66904H4-21, 5305-00-283-7505, 00-283-7505, 5305002837505, 002837505

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53AUG 28, 197300-283-750529294 ( SCREW, CLOSE TOLERANCE )
REFERENCE DRAWINGS & PICTURES

HEXAGON COUNTERSUNK

HIGH-TORQUE

Cross Reference | NSN 5305-00-283-7505
Part Number Cage Code Manufacturer
ST3M547-4-2176301BOEING COMPANY, THEDBA BOEING
HT308-4-2173197HI-SHEAR CORPORATION
HS2623-4Z2197928HUCK INTL INC
HT308-4-21L4528LISI AEROSPACE CANADA CORPDIV HI SHEAR HOLDINGS INC
66904H4-2150392SPS TECHNOLOGIES INC
66904H4-2156878SPS TECHNOLOGIES, LLCDBA AEROSPACE DIVISION
Technical Data | NSN 5305-00-283-7505
Characteristic Specifications
THREAD SERIES DESIGNATOR UNJF
NOMINAL THREAD DIAMETER0.250 INCHES
THREAD QUANTITY PER INCH28
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.372 INCHES MINIMUM AND 0.438 INCHES MAXIMUM
FASTENER LENGTH1.694 INCHES MINIMUM AND 1.740 INCHES MAXIMUM
HEAD STYLE0 HEXAGON COUNTERSUNK
HEAD DIAMETER0.497 INCHES MINIMUM AND 0.507 INCHES MAXIMUM
COUNTERSINK ANGLE100.0 DEGREES NOMINAL
INTERNAL DRIVE STYLE HIGH-TORQUE
GRIP LENGTH1.302 INCHES MINIMUM AND 1.322 INCHES MAXIMUM
GRIP DIAMETER0.2797 INCHES MINIMUM AND 0.2807 INCHES MAXIMUM
SPECIFICATION/STANDARD DATA76301-ST3547 MANUFACTURERS STANDARD