Product Details | CLOSE TOLERANCE SCREW

5305-01-256-5800 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: NAS47035, NAS4703-5, 5305-01-256-5800, 01-256-5800, 5305012565800, 012565800

Hardware and Abrasives | Screws

Supply Group (FSG) NSN Assign. NIIN
53 06 JUN 1987 01-256-5800

Drawings & Photos | NSN 5305-01-256-5800


Demand History | NSN 5305-01-256-5800

Part Number Request Date QTY Origin
NAS4703-5 2011-01-16 1200
5305-01-256-5800 2010-09-245 400 ZA

Cross Reference | NSN 5305-01-256-5800

Part Number Cage Code Manufacturer
NAS4703-5 80205 NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES

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Technical Data | NSN 5305-01-256-5800

Characteristic Specifications
THREAD SERIES DESIGNATOR UNJF
NOMINAL THREAD DIAMETER 0.190 INCHES
THREAD QUANTITY PER INCH 32
THREAD CLASS 3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH 0.323 INCHES NOMINAL
FASTENER LENGTH 0.620 INCHES MINIMUM AND 0.650 INCHES MAXIMUM
MATERIAL STEEL COMP 4340 OR STEEL COMP 8740 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION MIL-S-5000,UNS G43406 MIL SPEC 1ST MATERIAL RESPONSE OR AMS 6322 ASSN STD 2ND MATERIAL RESPONSE OR MIL-S-6049,UNS G87400 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
SURFACE TREATMENT CADMIUM AND CHROMATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION QQ-P-416,TYPE 2,CLASS 2 FED SPEC ALL TREATMENT RESPONSES OVERALL
HEAD STYLE C50 FLAT COUNTERSUNK
HEAD DIAMETER 0.266 INCHES MINIMUM AND 0.303 INCHES MAXIMUM
COUNTERSINK ANGLE 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
INTERNAL DRIVE STYLE B22 TRI-WING RECESS
GRIP LENGTH 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM
GRIP DIAMETER 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM
SPECIFICATION/STANDARD DATA 80205-NAS4703 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
III SUPPLEMENTARY FEATURES TRI-WING RECESS NO. NAS4000-4

Restrictions/Controls & Freight Information | NSN 5305-01-256-5800

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