Product Details | CLOSE TOLERANCE SCREW

5305-01-255-0096 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: 51B3347X, 51B334-7X, 5305-01-255-0096, 01-255-0096, 5305012550096, 012550096

Hardware and Abrasives | Screws

Supply Group (FSG) NSN Assign. NIIN
53 14 MAY 1987 01-255-0096

Drawings & Photos | NSN 5305-01-255-0096


Cross Reference | NSN 5305-01-255-0096

Part Number Cage Code Manufacturer
51B334-7X 06725 SPS TECHNOLOGIES LLC DBA AIR INDUSTRIES
51B334-7X 06950 ALCOA GLOBAL FASTENERS, INC. DBA ALCOA FASTENING SYSTEMS
51B334-7X 0JRC1 NORTHROP GRUMMAN TECHNICAL SERVICES, INC.
51B334-7X 27624 SPS TECHNOLOGIES, LLC DBA PB FASTENERS
51B334-7X 73197 HI-SHEAR CORPORATION
51B334-7X 76823 NORTHROP GRUMMAN SYSTEMS CORPORATION DIV NORTHROP GRUMMAN AEROSPACE
51B334-7X 80539 SPS TECHNOLOGIES, LLC DBA AEROSPACE FASTENERS GROUP
51B334-7X 92215 ALCOA GLOBAL FASTENERS, INC. DBA ALCOA FASTENING SYSTEMS
51B334-7X L4528 LISI AEROSPACE CANADA CORP

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Technical Data | NSN 5305-01-255-0096

Characteristic Specifications
THREAD SERIES DESIGNATOR UNJC
NOMINAL THREAD DIAMETER 0.250 INCHES
THREAD QUANTITY PER INCH 28
THREAD CLASS 3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH 0.306 INCHES MINIMUM AND 0.326 INCHES MAXIMUM
FASTENER LENGTH 0.743 INCHES MINIMUM AND 0.763 INCHES MAXIMUM
MATERIAL STEEL COMP 4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE OVERALL
SURFACE TREATMENT CADMIUM OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HEAD STYLE C50 FLAT COUNTERSUNK
HEAD DIAMETER 0.499 INCHES MINIMUM AND 0.507 INCHES MAXIMUM
COUNTERSINK ANGLE 100.0 DEGREES NOMINAL
INTERNAL DRIVE STYLE D8 TORQUE SET
GRIP LENGTH 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM
GRIP DIAMETER 0.2640 INCHES MINIMUM AND 0.2650 INCHES MAXIMUM
SPECIAL FEATURES 0.0156 IN. OVERSIZE SHANK FOR REPAIR WORK ONLY

Restrictions/Controls & Freight Information | NSN 5305-01-255-0096

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