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Introduction

Every day, all around the world, mechanical engineers, purchasing professionals, and a vast array of component part manufacturers, fabricators, and converters spend their days designing, testing, and manufacturing basic components, or mechanical parts, used in nearly everything that’s made.   These parts and products go by many names (i.e. gaskets, fasteners, insulators, shields, filters, etc.) and have unlimited uses, but, nonetheless, have a number of common elements that apply to nearly every application:  They are all fabricated using materials and processes common to many other products, and these – not the end use – are what define the characteristics, range of options, and costs. 

Even so, most such parts and components are designed and manufactured as though relative only to the application requirements, a process that causes a lot of “reinventing the wheel” with regard to mechanical parts.   Component designers are naturally focused on the application requirements, often relegating manufacturability to buyers and  

Regardless of common features, components tend to be designed and made as a component of their end use without much regard for other products made of similar materials, for similar applications, and/or using similar manufacturing processes. 

For instance, for years we and many others like us have made standard-shape stampings or die cut parts for equipment manufacturers ranging from aerospace avionics to medical equipment to HEPA filters and so on.  For the most part, each of these identifies their custom-designed parts by part number and end application, and, following suit, so do we.  What this does, if one steps back and looks at the overall picture, is it renders every rubber or plastic washer, for instance, into a special or custom product from design to production: Dimensions, tolerances, prices, processes, etc. all are redone with each new part, usually with little regard to the fact that it is only one of many very similar parts being made for other end uses. 

Although many efforts have been made to standardize components and materials, most are industry, material, or product specific.  Many such specifications find application in arenas beyond their initial focus, like aerospace standard o-ring sizes, but for the most part, component part consumers and manufacturers do a lot of “reinventing the wheel” when it comes to designing and making mechanical parts.

Purpose

The purpose of this standard is to establish  for defining single-material component parts and products and the materials from which they are manufactured. 

the array of materials and products used in the production and sale of goods, particularly two-dimensional mechanical parts manufactured from sheeted materials (die cutting, waterjet, etc.) or extruded in continuous lengths, and three-dimensional molded shapes.

Definitions

OD – Outside Diameter; longest measure across the outer breadth of a round shape like a ring, sphere, or cone.

ID – Inside Diameter; longest measure across the inner breadth of a centered round interior hole or center as in a ring, washer, cylinder, tube, etc.

Overall --

Elements

Material Designation

Materials and products are categorized by a five element alphanumeric code (2 alpha characters + 1 numeric value + 1 alpha character + 1 numeric value; i.e. RA15B3, MF3F25, etc.), with the elements defined as follows:

1. Group (Rubber, Plastic, etc.)
2. Class (Neoprene, Polyester, etc.)
3. Grade (High Grade, Electrical Grade, etc.)
4. Form (Flat Sheet, Two-Dimensional Extrusion, etc.)
5. Shape (Round OD/ID, Misc. Polygon, Rectangle OD/ID, etc.)

Dimensions

Dimensions are defined first by three hyphenated numeric values indicating the overall dimensions, meaning the size of the smallest hypothetical rectangle box the part would fit within.  The particular order of these dimensions is defined by the Form, as follows:

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Metro Industries, Inc. dba Standard-Gasket.com 4018 E. 137th Terrace Grandview, Missouri  64030 (USA) Voice: 816-763-7277 / 800-545-8578 Fax: 816-763-0476

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