how much FIDE rating required to be a NM(National Master)?

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TetsuoShima
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TheOldReb

The United States Chess Federation (USCF) awards the Title of National Master to anyone who achieves a USCF rating of 2200, and the title of Senior Master to anyone who achieves a USCF rating of 2400. The USCF also awards the Life Master title to anyone who holds a 2200 rating for a total of 300 or more games in his or her lifetime.

In the United States, the title of "National Master" is awarded for life, regardless of whether the rating of a National Master subsequently goes below 2200.[1] In August 2002, this position was codified (after being recognized as the existing status quo) by the USCF Policy Board with the passage of a motion stating "Any USCF member who has had a regular post tournament rating of 2200 or higher (published or not) has demonstrated a significant level of chess ability and is recognized by being automatically awarded the lifetime title of National Master."

TheOldReb

http://en.wikipedia.org/wiki/Chess_master