Product Details | CLOSE TOLERANCE SCREW

5305-01-256-5795 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: NAS4605U18, 5305-01-256-5795, 01-256-5795, 5305012565795, 012565795

Hardware and Abrasives | Screws

Supply Group (FSG) NSN Assign. NIIN
53 06 JUN 1987 01-256-5795

Drawings & Photos | NSN 5305-01-256-5795


Cross Reference | NSN 5305-01-256-5795

Part Number Cage Code Manufacturer
NAS4605U18 80205 NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES

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Technical Data | NSN 5305-01-256-5795

Characteristic Specifications
THREAD SERIES DESIGNATOR UNJF
NOMINAL THREAD DIAMETER 0.312 INCHES
THREAD QUANTITY PER INCH 24
THREAD CLASS 3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH 0.438 INCHES NOMINAL
FASTENER LENGTH 1.548 INCHES MINIMUM AND 1.578 INCHES MAXIMUM
MATERIAL TITANIUM ALLOY UNS R56400 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE AND AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
HEAD STYLE C50 FLAT COUNTERSUNK
HEAD DIAMETER 0.575 INCHES MINIMUM AND 0.635 INCHES MAXIMUM
COUNTERSINK ANGLE 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
INTERNAL DRIVE STYLE B22 TRI-WING RECESS
GRIP LENGTH 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM
GRIP DIAMETER 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM
SPECIFICATION/STANDARD DATA 80205-NAS4605 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
III SUPPLEMENTARY FEATURES TRI-WING RECESS NO. NAS4000-7

Restrictions/Controls & Freight Information | NSN 5305-01-256-5795

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