Where can I find this specific abrasive product? Company: 3M. Procuct
name: 405N free cut, open coat. Grade:500. My question concerns
on-line shops only!

Hello.

I have located two online retailers that sell this product:

M-source.com
3M UPC Product Number
51144102402
500A 3M405N TRI F/C PA OP TF
http://www.m-source.com/manderscheid/products/product.asp?Class=347&ClassName=Sheets+-+3M+405N
Contact information:
http://www.m-source.com/manderscheid/contactus.asp

Hillas.com
"3M Sheet 405N, 9 in x 11 in 500 A wt, 100 per inner, 1000 per case
Availability: 3M stocked item. Full case purchase may be required."
http://www.hillas.com/Products/3M_Sheets__Stock_Program/00051144102402.asp
Contact information:
http://www.hillas.com/StaticPage.asp?ID=1

search strategy:
3m 405n

I hope these shops meet your needs.  If anything is unclear, please
use the "request clarification" feature. Thanks.