scope:

This standard includes the basic screw thread dimensional and acceptability requirements for common screw thread forms and applications. Design and use information are also provided when necessary. Specific requirements for particular screw threads, gages, etc., are covered by detailed standard sections.

The issues of the following documents in effect on the date of invitation for bids or request for proposal form a part of this standard to the extent specified herein.

FEDERAL STANDARDS FED-STD-H28/1 - Nomenclature, Definitions, and Letter Symbols for Screw Threads FED-STD-H28/2 - Unified Inch Screw Threads - UN and UNR Thread Forms FED-STD-H28/3 - CANCELED AND SUPERSEDED by FED-STD-H28/2 FED-STD-H28/4 - Controlled Radius Root Screw Threads, UNJ Symbol FED-STD-H28/5 - Unified Miniature Screw Threads FED-STD-H28/6 - Gages and Gaging for Unified Screw Threads - UN and UNR Thread Forms FED-STD-H28/7 - Pipe Threads, General Purpose FED-STD-H28/8 - Dryseal Pipe Threads FED-STD-H28/9 - Gas Cylinder Valve Outlet and Inlet Threads FED-STD-H28/10 - American National Hose Coupling and Fire-Hose Coupling Threads FED-STD-H28/11 - Hose Connections for Welding and Cutting Equipment FED-STD-H28/12 - Acme Threads FED-STD-H28/13 - Stub Acme Threads FED-STD-H28/14 - Buttress Screw Threads - 7°/45° Flank Angles FED-STD-H28/15 - Rolled Threads for Screw-Shells for Electric Lampholders and Lamp Bases FED-STD-H28/16 - Microscope Objective and Nosepiece Threads, 0.8000 - 36AMO FED-STD-H28/17 - Surveying Instrument Mounting Threads FED-STD-H28/18 - Photographic Equipment Threads FED-STD-H28/19 - Miscellaneous Threads FED-STD-H28/20 - Inspection Methods for Acceptability of UN, UNR, UNJ, M and MJ Screw-Threads FED-STD-H28/21 - Metric Screw-Threads FED-STD-H28/22 - Gages and Gaging for Metric Screw Threads - M and MJ Thread Forms FED-STD-H28/23 - Class 5 Interference-Fit Screw Threads MILITARY STANDARDS MIL-S-8879 - Screw Threads, Controlled Radius Root With Increased Minor Diameter, General Specification for MILITARY HANDBOOKS MIL-HDBK-60 - Threaded Fasteners - Tightening to Proper Tension

(Copies of the above documents are available from the Standardization Document Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.)

The following documents form a part of this standard to the extent specified herein. Unless a specific issue is identified, the issue in effect on date of invitation for bids or request for proposal shall apply.

AMERICAN NATIONAL STANDARDS AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME) PUBLICATIONS ASME B1.1 - Unified Inch Screw Threads (UN and UNR Thread Form) ANSI/ASME B1.2 - Gages and Gaging for Unified Inch Screw Threads ASME B1.3M - Screw Thread Gaging Systems for Dimensional Acceptability - Inch and Metric Screw Threads (UN, UNR, UNJ, M, and MJ) ASME/ANSI B1.5 - Acme Screw Threads ANSI/ASME B1.7M - Nomenclature, Definitions, and Letter Symbols for Screw Threads ASME/ANSI B1.8 - Stub Acme Screw Threads ANSI B1.9 - Buttress Inch Screw Threads ASA B1.10 - Unified Miniature Screw Threads ASA B1.11 - Microscope Objective Thread ASME/ANSI B1.12 - Class 5 Interference-Fit Thread ANSI/ASME B1.13M - Metric Screw Threads - M Profile ANSI/ASME B1.16M - Gages and Gaging for Metric M Screw Threads ANSI/ASME B1.20.1 - Pipe Threads, General Purpose (Inch) ANSI B1.20.3 - Dryseal Pipe Threads (Inch) ASME B1.20.5 - Gaging for Dryseal Pipe Threads (Inch) ASME B1.20.7 - Hose Coupling Screw Threads (Inch) ANSI B1.21M - Metric Screw Threads - MJ Profile ANSI/ASME B1.22M - Gages and Gaging for MJ Series Metric Screw Threads ANSI B18.2.1 - Square and Hex Bolts and Screws, Inch Series ASME/ANSI B18.2.2 - Square and Hex Nuts (Inch Series) ANSI B18.6.2 - Slotted Head Cap Screws, Square Head Set Screws, and Slotted Headless Set Screws ANSI B18.6.3 - Machine Screws and Machine Screw Nuts ANSI B18.6.4 - Thread Forming and Thread Cutting Tapping Screws and Metallic Drive Screws (Inch Series) AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) PUBLICATIONS ANSI C81.61 - Electrical Lamp Bases ANSI C81.62 - Lampholders for Electric Lamps ANSI C81.63 - Gauges for Electric Lamp Bases and Lampholders ANSI PH3.101 - Photography (Cameras) - Tripod Connections for American Cameras (1/4-Inch-20 Thread) ANSI PH3.102 - Photography (Cameras) - Tripod Connections for Heavy-Duty or Imported Cameras 3/8-Inch-16 Thread With Adapter for 1/4-Inch-20 Tripod Screws) ANSI PH3.103 - Photography (Cameras) - Lens Barrel Attachment Threads for Lens Accessories ANSI PH3.107 - Photography (Cameras) - Shutter Cable Release and Socket - Dimensions SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS (SMPTE) PUBLICATION ANSI/SMPTE 76 - Motion-Picture Cameras - 16- and 8- mm Threaded Lens Mounts NATIONAL FIRE PROTECTION ASSOCIATION PUBLICATION NFPA 1963 - Screw Threads and Gaskets for Fire Hose Connections COMPRESSED GAS ASSOCIATION (CGA) PUBLICATION ANSI/CSA/CGA V-1 - Compressed Gas Cylinder Valve Outlet and Inlet Connections

(Copies of the above documents are available from the American National Standards Institute, 11 West 42nd Street, New York, NY 10036-8002 or from the applicable publisher:

American Society of Mechanical Engineers, 345 East 47th Street, New York, NY 10017-2392

or

Society of Motion Picture and Television Engineers, 595 West Hartsdale Avenue, White Plains, NY 10607-1824

or

National Fire Protection Association, One Batterymarch Park, Quincy, MA 02169-7473

or

Compressed Gas Association, 1725 Jefferson Davis Highway, Arlington, VA 22202-4102)

COMPRESSED GAS ASSOCIATION PUBLICATION CGA E-1 - Standard Connections for Regulator Outlets, Torches and Fitted Hose for Welding and Cutting Equipment

Copies of the above document are available from the Compressed Gas Association, 1725 Jefferson Davis Highway, Arlington, VA 22202-4102)