What are different grades?
Tuesday, March 12, 2019
Every BHMA® product can be identified by a five digit identification number preceded by a prefix letter. (The illustration which follows is purely an example. Products are different by nature, therefore product categories each have numbering systems that may be slightly different. You must refer to the actual standard.)
For example, a product number for a cabinet hardware item might be listed as B 5 2 1 3 1
The prefix letter denotes the BHMA® Product Section that produces the hardware.
The first numeral designates the base material for the product. BHMA® standards use the default number '0' to allow the manufacturer to use an optional material that meets the performance requirements of the applicable standard.
The second number identifies the type of product.
The third and fourth numerals identify the function of the specific item.
The fifth number indicates the performance grade or other descriptions of the product. See applicable standard.
Every ANSI/BHMA standard contains an explanation of the BHMA® product numbering code applicable for that particular category of hardware. Using the example above, a specifier would refer to the ANSI/BHMA Standard A156.9 for cabinet hardware, and ascertain that for product B 5 2 1 3 1...
B = Product Section for cabinet hardware hinges
5 = Stainless steel
2 = Cabinet knob
13 = Back mounted
1 = Grade One
Thus the product is a Grade 1, back-mounted stainless steel cabinet knob.