NSN 5305-01-042-6318

Part Details | CLOSE TOLERANCE SCREW

5305-01-042-6318 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: HT80994D3, HT8099-4D3, HT193LB4H3, BM210094H3, BM21009-4H3, T1514D3, T151-4D3, BM210094H3, BM21009-4H3, T1514D3, T151-4D3, HT193LB4H3, GB511J4D3, 67077D43, 67077D4-3, 67077D43, 67077D4-3, 5305-01-042-6318, 01-042-6318, 5305010426318, 010426318

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53JUN 14, 197701-042-631829294 ( SCREW, CLOSE TOLERANCE )
REFERENCE DRAWINGS & PICTURES

DISHED HEXAGON

HIGH-TORQUE

DOUBLE HEXAGON FLATS

Cross Reference | NSN 5305-01-042-6318
Part Number Cage Code Manufacturer
HT8099-4D392215ARCONIC GLOBAL FASTENERS & RINGS,INC.
HT193LB4H373197HI-SHEAR CORPORATION
BM21009-4H317446HUCK INTERNATIONAL, INC.DBA ARCONIC FASTENING SYSTEMS AND
T151-4D317446HUCK INTERNATIONAL, INC.DBA ARCONIC FASTENING SYSTEMS AND
BM21009-4H397928HUCK INTL INC
T151-4D397928HUCK INTL INC
HT193LB4H3L4528LISI AEROSPACE CANADA CORPDIV HI SHEAR HOLDINGS INC
GB511J4D326512NORTHROP GRUMMAN SYSTEMS CORPORATIONDIV MISSION SYSTEMS
67077D4-356878SPS TECHNOLOGIES, LLCDBA AEROSPACE DIVISION
67077D4-380539SPS TECHNOLOGIES, LLCDBA AEROSPACE FASTENERS GROUP
Technical Data | NSN 5305-01-042-6318
Characteristic Specifications
THREAD SERIES DESIGNATOR UNJF
NOMINAL THREAD DIAMETER0.250 INCHES
THREAD QUANTITY PER INCH28
THREAD DIRECTION RIGHT-HAND
MINIMUM TENSILE STRENGTH160000 POUNDS PER SQUARE INCH
HEAD STYLE2 DISHED HEXAGON
HEAD DIAMETER0.473 INCHES MINIMUM AND 0.492 INCHES MAXIMUM
HEAD HEIGHT0.162 INCHES MINIMUM AND 0.175 INCHES MAXIMUM
INTERNAL DRIVE STYLE HIGH-TORQUE
HOLE CONFIGURATION STYLE2 DOUBLE HEXAGON FLATS
HOLE TYPE DRILLED
HOLE QUANTITY2
HOLE DIAMETER0.037 INCHES NOMINAL
GRIP LENGTH0.188 INCHES NOMINAL
GRIP DIAMETER0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
SPECIAL FEATURESDRY FILM LUBRICANT
SPECIFICATION/STANDARD DATA26512-GB511J PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT