NSN 5305-01-177-1806

Part Details | CLOSE TOLERANCE SCREW

5305-01-177-1806 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: HT817734, HT8177-3-4, ST3M56234, ST3M562-3-4, HT30934, HT309-3-4, BM1903134, BM19031-3-4, BM1903134, BM19031-3-4, HT30934, HT309-3-4, 73991H34, 73991H-3-4, 5305-01-177-1806, 01-177-1806, 5305011771806, 011771806

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53APR 20, 198401-177-180629294 ( SCREW, CLOSE TOLERANCE )
REFERENCE DRAWINGS & PICTURES

HEXAGON COUNTERSUNK

HIGH-TORQUE

Cross Reference | NSN 5305-01-177-1806
Part Number Cage Code Manufacturer
HT8177-3-492215ARCONIC GLOBAL FASTENERS & RINGS,INC.
ST3M562-3-476301BOEING COMPANY, THEDBA BOEING
HT309-3-473197HI-SHEAR CORPORATION
BM19031-3-417446HUCK INTERNATIONAL, INC.DBA ARCONIC FASTENING SYSTEMS AND
BM19031-3-497928HUCK INTL INC
HT309-3-4L4528LISI AEROSPACE CANADA CORPDIV HI SHEAR HOLDINGS INC
73991H-3-480539SPS TECHNOLOGIES, LLCDBA AEROSPACE FASTENERS GROUP
Technical Data | NSN 5305-01-177-1806
Characteristic Specifications
THREAD SERIES DESIGNATOR UNF
NOMINAL THREAD DIAMETER0.190 INCHES
THREAD QUANTITY PER INCH32
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.210 INCHES MINIMUM AND 0.277 INCHES MAXIMUM
FASTENER LENGTH0.470 INCHES MINIMUM AND 0.517 INCHES MAXIMUM
HEAD STYLE0 HEXAGON COUNTERSUNK
HEAD DIAMETER0.376 INCHES MINIMUM AND 0.385 INCHES MAXIMUM
COUNTERSINK ANGLE99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
INTERNAL DRIVE STYLE HIGH-TORQUE
GRIP LENGTH0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM
GRIP DIAMETER0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM