Try checking in the properties of each model to see if there is any more information.
If there is nothing helpful there then maybe below will help a little bit.....
The #11 woodruff key is 3/16" x 7/8" on McMaster's website, Here are the part numbers for the different materials:
98481A140 - Steel
98525A140 - Alloy Steel
97940A140 - 316 Stainless steel.
The one thing about o-rings is the AS568 oring dash numbers sizes usually find their way into the part numbers of other company's part numbers. I would say that the 01 is the material code and the -244 is the size code. Depending on the application you would have to choose a material that works. Just search on McMaster for AS568 and you should see it pop up. I would say that 90% of the the time Buna-N would be a good material to use since it is oil and fuel resistant and can handle a good amount of heat.
Hope this helps!!!
If a search on the info in your bom falls short, you can also check with your purchasing department. Sometimes they can look back and find out where they got it and exactly what it was. With that info you can usually then find the tech data from the manufacture.
Also, I would try to get a physical part you can disassemble and measure as you go. The O-ring for instance stretches and changes shape as you use it. For building your model I would think you would want the 'in use' shape not the part size necessarily. Though this is a area we are wishy washy on. We use a lot of gaskets and go back and fourth if it makes sense to show the compressed gasket or leave it uncompressed and measurable but overlapping.
Also sometimes parts have their model # right on them and will save you some of the searching.
Plus its just fun to take things apart.
I am assuming your company still assembles this skimmer? Can you go to the assembly shop and ask them for samples of the parts they are using. They may have a box of purchased components complete with part number or something to measure. Or your purchasing people, where and what part numbers do they buy for the skimmers?
What document type are you working from? Paper, old AutoCad files?
Anna you type faster than me.... And get the point more efficiently...