Each Newton item, assembly, or kit is identified in catalog information by a ten-character Ordering Number. Use of the full ten-character Ordering Number, along with the item's description, is preferred when ordering.

The ten characters of the Newton catalog numbering system are defined below (NNNNNNDDXX is used for descriptive purposes only).

Figure Number: a six-character abbreviation of the full ten-character Ordering Number: used for indexing in printed or electronic documentation; may include a Dash Number(s), which defines a variation within the Figure Number (refer to Dash Number description below).

Dash Number (ninth and tenth characters): defines that no finish is applicable, that the item has a Plated or Painted finish, or the item is thermoplastic. The Finish Code may be numeric, alphabetic, or alphanumeric. Refer to the Finish Code listing below for commonly used Finish Codes for metal items; Finish Codes used for thermoplastic Fiber Cable Management items are separately defined.

Ordering: When ordering by Newton's ten-character Ordering Number, provision for defining the Finish Code is automatically included. Where the Finish Code can be user-specified, characters nine and ten of the Ordering Number are shown in catalog information as XX, allowing the user to replace XX (characters nine and ten) with the desired Finish Code. The desired Finish Code may also be defined in writing by the customer order. Items that include a predefined Finish Code (other than XX) are available with only that predefined finish. If the Ordering Number contains XX as the ninth and tenth characters and the purchase order does not specify a finish within the Ordering Number or in writing, Newton's Standard Finish Code for that item will be provided.

All of the parts included in an item's stock list (or equivalent) are included with the item / assembly / kit Ordering Number. Where the Finish Code for an item is defined within the stock list, that item is provided with the defined finish.