From Glossary of Metalworking Terms

Chapter N: N NWSA

N

n
(1) The symbol for spindle speed; (2) symbol for nano-. SI system prefix for 10 -9; (3) symbol for unspecified number; (4) symbol for rotational frequency ( n-italic).
N
(1) Symbol for Avogadro's number, (6.023 x 10 23); (2) symbol for the element nitrogen; (3) symbol for newton.
Na
Symbol for the element sodium.
NADCA
Abbreviation for North American Die Casting Association.
naphthalene
[C 10H 8] A white crystalline solid used in metal cutting fluids.
National Association of Metal Finishers (NAMF)
112 J, Elden Street, Herndon VA 20170. Telephone: 703/709-8299. Web: http://www.namf.org
National Certified Pipe Welding Bureau (NCPWB)
1385 Picard Drive, Rockville, MD 20850-4329. Telephone: 301/869-5800; 800/556-3653. FAX 301/990-9690. WEB: http://www.mcaa.org A division of the Mechanical Contractors Association of America, Inc (MCAA). Its purpose is to develop and test procedures and, through its local chapters, to establish pools of people qualified to weld under these procedures.
National Electrical Manufacturers Association (NEMA)
1300 N. 17 th Street, Suite 1847, Rosslyn VA 22209. Telephone: 703/841-3200. FAX: 703/841-5900. WEB: http://www.nema.org An industry association of manufacturers of electrical machinery. Publishes standards and industry statistics including welding.
National Fire Protection Association (NFPA)
1 Batterymarch Park, Quincy MA 02269-910. Telephone: 1-800-344-3555. Web: http://www.nfpacatalog.org
An international membership organization established to promote the science and improve the methods of fire protection and prevention, and establish safeguards against loss of life and property by fire. Best known in industry for the National Fire Codes and the National...
Copyright Industrial Press Inc. 2003 under license agreement with Books24x7

Products & Services
Fire Protection Services
Fire protection services install, maintain and monitor safety equipment such as flame and smoke detectors, sprinkler systems, fire alarms and annunciators.
Fire Sprinkler Heads
Fire sprinkler heads deliver a high-pressure flow of water or dry chemicals to a fire. They are usually are heat-activated and part of a larger fire prevention and safety system.
Photovoltaic Cells and Panels
Photovoltaic cells or solar cells generate a voltage when radiant energy falls on the boundary between dissimilar substances.  A solar panel, also called a photovoltaic panel, is a group of photovoltaic cells that are enclosed to keep the cells safe and so that the voltage obtained from each cell can be combined.
Flammability and Fire Testing Services
Flammability and fire testing services evaluate finished products or components through specialized environmental exposure tests.
Safety Labels and Signs
Safety signs and warning signs consist of non-traffic-related notifying text, symbols and background. They are designed to inform the reader of a potential hazards or dangers and are usually printed on a rigid or semi-rigid material.

Topics of Interest

Chapter O: O Oxygen Free Copper O Symbol for the element oxygen. ?, ? See also omega (?, ?). oblique triangle A common name for both acute triangles and obtuse triangles. obtuse angle If the...

Acoustical Society of America (ASA) Huntington Quandrangle, Suite 1N01 Melville, NY 11707 (516) 576-2360 Adhesive and Sealant Council (ASC) 1500 Wilson Blvd., Suite 515 Arlington, VA 22209...

This chapter lists common USA and British standards pertaining to valves, as published in the standard indexes of the various standard organizations for 2003. Because new standards are continually...

SOCIETIES & CONFERENCE SPONSORS American Electronics Association 5201 Great American Parkway, Suite 520 Santa Clara, CA 95054 Tel: (408) 987-4200 http://www.aeanet.org American Institute of...

Air Transport Association (ATA) 1301 Pennsylvania Ave., NW, Suite 1100 Washington, D.C. 20004-1707 202-626-4172 http://www.airlines.org American Association of Museums (AAM) 1575 I St., NW,...

Product Announcements
Deep South Crane & Rigging
Deep South Crane & Rigging