what grade is ND series?

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The B500 deadbolts meet the following certification: ANSI A156.5, 2001, Grade 2. Available UL Listed for 3-hour fire door.
The AL lock is a Grade 2 lock ANSI/BHMA Certified A156.2-2003, Series 4000, Grade 2, UL Listed for 3-hour fire door.
Schlage offers 629 and 630 stainless finishes on levers for the L-Series only.  These levers are made of 303 or 304 grade stainless steel.
The American National Standards Institute (ANSI) and Builders Hardware Manufacturers Association (BHMA) have developed durability, strength and performance standards for every type of door hardware...
The B600, B700, and B800 are all grade 1 heavy duty commercial deadbolts.
The Schlage ND Series listing is: ANSI/ BHMA A156.2-2003 Grade 1
The B250 is Grade 2 but has no UL listing due to the holdback rose.
Falcon 25 series is a ANSI/BHMA A156.3 Standard for Grade 1 device.
Falcon F-25 series is the UL Rated Fire Exit Hardware device is a ANSI/BHMA A156.3 Standard for Grade 1 device.
A copy of the BHMA Directory Listing can be viewed in the online Certified Directory on the BHMA web site. BHMA
The S200 as of January 1st 2011 is no longer a BHMA grade 2 lock.  We are continually improving our products to meet our customers expectations as such the CS200 product line will be replacing...