2 Understanding the Numbers ID and OD • ID – Refers to the Internal Diameter of any expanded part • OD – References the Outside Diameter (not expanded) Suffix • EX – Refers to an Expanded part • SB – Refers to an unexpanded end or Straight Bottom • A – at the end of a part number means Aluminized material • C – at the end of a part number means Chromed • CL or CC – Ceramic Lined and Ceramic Coated • S3 – 304 Stainless Steel • S4 – 409 Stainless Steel • BS – Black Powder Coated Prefix • SB – School Bus (Prefix) • M – Muffler • L – Elbow • S – Straight Stick EXAMPLE OF ID VS. OD S5-12EXA EX OR ID DIA SB OR OD DIA Straight sticks are the back-bone of the company. Used both in individual sale and the production of all our systems. S5-120SBA Refers to Straight length Diameter of Part Overall Length of Part Expanded or Straight Bottom Material Finish Beginning: (Product Type) • S5-120SBA - S5, S4, S3.5, etc. Shows the different diameters Middles: (End Forming Type) • S5-120SBA – (SB = Straight Bottom) • S5-120EXA – (EX = One end Expanded and Slotted) • S5-120EXEXA – (EXEX = Both ends Expanded and Slotted) Grand Rock Numbering System Common Prefix, Suffix and Acronyms Straight Sticks
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