From Glossary of Metalworking Terms

Chapter N: N NWSA


(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).
(1) Symbol for Avogadro's number, (6.023 x 10 23); (2) symbol for the element nitrogen; (3) symbol for newton.
Symbol for the element sodium.
Abbreviation for North American Die Casting Association.
[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:
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: 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: 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:
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...

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 Alarm Control Panels

Fire alarm control panels (FACPs) transmit signals between fire detection devices and alarms, suppression systems, and monitoring centers. This device reduces the potential for fatalities and property loss from structure fires.

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.
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.

Topics of Interest

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