NSN 5305-01-444-2398

Part Details | CLOSE TOLERANCE SCREW

5305-01-444-2398 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: HT402049A, HT4020-4-9A, HT402049A, HT4020-4-9A, ST3M652C49A, ST3M652C4-9A, ST3M652C49A, ST3M652C4-9A, ST3M652C49A, ST3M652C4-9A, ST3M652C49A, ST3M652C4-9A, HT402049A, HT4020-4-9A, ST3M652C49A, ST3M652C4-9A, HT402049A, HT4020-4-9A, HT402049A, HT4020-4-9A, 11925C49A, 11925C4-9A, HT402049A, HT4020-4-9A, HT402049A, HT4020-4-9A, HT402049A, HT4020-4-9A, HT402049A, HT4020-4-9A, HT402040A, HT4020-4-0A, HT402049A, HT4020-4-9A, HT402049A, HT4020-4-9A, ST3M652C49A, ST3M652C4-9A, WC402049A, WC4020-4-9A, 5305-01-444-2398, 01-444-2398, 5305014442398, 014442398

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53MAY 01, 199701-444-239829294 ( SCREW, CLOSE TOLERANCE )
REFERENCE DRAWINGS & PICTURES

HEXAGON COUNTERSUNK

HIGH-TORQUE

Cross Reference | NSN 5305-01-444-2398
Part Number Cage Code Manufacturer
HT4020-4-9A92215ARCONIC GLOBAL FASTENERS & RINGS,INC.
HT4020-4-9A06950ARCONIC GLOBAL FASTENERS & RINGS,INC.
ST3M652C4-9A92215ARCONIC GLOBAL FASTENERS & RINGS,INC.
ST3M652C4-9A76301BOEING COMPANY, THEDBA BOEING
ST3M652C4-9A58998FASTENER INNOVATION TECHNOLOGY, INC.DBA F I T
ST3M652C4-9A0ZC92HEARTLAND PRECISION FASTENERS, INC.
HT4020-4-9A73197HI-SHEAR CORPORATION
ST3M652C4-9A1VSL7HOUSTON PRECISION FASTENERS I, LP
HT4020-4-9A17446HUCK INTERNATIONAL, INC.DBA ARCONIC FASTENING SYSTEMS AND
HT4020-4-9AL4528LISI AEROSPACE CANADA CORPDIV HI SHEAR HOLDINGS INC
11925C4-9A59563REID PRODUCTS INC.DBA REID PRODUCTS
HT4020-4-9A0PTK6SPS TECHNOLOGIES INC
HT4020-4-9AK5673SPS TECHNOLOGIES LTD TJ BROOKSDIVISION
HT4020-4-9A56878SPS TECHNOLOGIES, LLCDBA AEROSPACE DIVISION
HT4020-4-9A80539SPS TECHNOLOGIES, LLCDBA AEROSPACE FASTENERS GROUP
HT4020-4-0A80539SPS TECHNOLOGIES, LLCDBA AEROSPACE FASTENERS GROUP
HT4020-4-9A06725SPS TECHNOLOGIES, LLCDBA AIR INDUSTRIES
HT4020-4-9A27624SPS TECHNOLOGIES, LLCDBA PB FASTENERS
ST3M652C4-9A06710VALLEY-TODECO, INC.DBA ARCONIC FASTENING SYSTEMS AND
WC4020-4-9A60516WEST COAST AEROSPACE INC
Technical Data | NSN 5305-01-444-2398
Characteristic Specifications
THREAD SERIES DESIGNATOR UNJF
NOMINAL THREAD DIAMETER0.250 INCHES
THREAD QUANTITY PER INCH28
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.443 INCHES MINIMUM AND 0.510 INCHES MAXIMUM
FASTENER LENGTH1.015 INCHES MINIMUM AND 1.062 INCHES MAXIMUM
HEAD STYLE1 HEXAGON COUNTERSUNK
HEAD DIAMETER0.502 INCHES MINIMUM AND 0.507 INCHES MAXIMUM
HEAD HEIGHT0.071 INCHES MINIMUM AND 0.073 INCHES MAXIMUM
COUNTERSINK ANGLE100.0 DEGREES NOMINAL
INTERNAL DRIVE STYLE HIGH-TORQUE
GRIP LENGTH0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM
GRIP DIAMETER0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
SPECIAL FEATURESFURNISHED WITH O-RING