Product Details | CLOSE TOLERANCE SCREW

5305-01-263-5618 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.

Part Alternates: 3M96343, 3M963-4-3, 3M9634L3, 3M963-4L3, 5305-01-263-5618, 01-263-5618, 5305012635618, 012635618

Hardware and Abrasives | Screws

Supply Group (FSG) NSN Assign. NIIN
53 16 SEP 1987 01-263-5618

Drawings & Photos | NSN 5305-01-263-5618


Cross Reference | NSN 5305-01-263-5618

Part Number Cage Code Manufacturer
3M963-4-3 76301 BOEING COMPANY, THE DBA BOEING
3M963-4L3 06725 SPS TECHNOLOGIES LLC DBA AIR INDUSTRIES
3M963-4L3 06950 ALCOA GLOBAL FASTENERS, INC. DBA ALCOA FASTENING SYSTEMS
3M963-4L3 17446 HUCK INTERNATIONAL, INC. DBA ALCOA FASTENING SYSTEMS
3M963-4L3 58845 ABOUNDING SECURITY INC DIV OF MAA CORP
3M963-4L3 76301 BOEING COMPANY, THE DBA BOEING
3M963-4L3 80539 SPS TECHNOLOGIES, LLC DBA AEROSPACE FASTENERS GROUP
3M963-4L3 97928 HUCK INTL INC

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Technical Data | NSN 5305-01-263-5618

Characteristic Specifications
THREAD SERIES DESIGNATOR UNJF
NOMINAL THREAD DIAMETER 0.250 INCHES
THREAD QUANTITY PER INCH 28
THREAD CLASS 3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM
FASTENER LENGTH 0.642 INCHES MINIMUM AND 0.672 INCHES MAXIMUM
MATERIAL STEEL COMP 8740 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION MIL-S-6049 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT ALUMINUM OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION MIL-C-83488,TYPE 2 CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
MINIMUM TENSILE STRENGTH 180000 POUNDS PER SQUARE INCH
HEAD STYLE C54 OVAL COUNTERSUNK
HEAD DIAMETER 0.3898 INCHES MINIMUM AND 0.3948 INCHES MAXIMUM
COUNTERSINK ANGLE 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
INTERNAL DRIVE STYLE D8 TORQUE SET
GRIP LENGTH 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM
GRIP DIAMETER 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
SURFACE FINISH 32.0 MICROINCHES GRIP 32.0 MICROINCHES THREADS
SPECIFICATION/STANDARD DATA 76301-3M963 MANUFACTURERS STANDARD

Restrictions/Controls & Freight Information | NSN 5305-01-263-5618

Category Code Description
Hazardous Material Indicator CodeNThere is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:ANon-Munitions List Item/ Non-Strategic List Item - Demilitarization not required.
Precious Metals Indicator Code:UPrecious metal type is unknown
Criticality Code:X The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Category Code Description
No Freight Information