O-Ring Identification and Selection Guide - Lighthouse Process
013 Silicone O-ring 70A Durometer Red, Sterling Seal and Supply (1000 Pack) - Walmart.com
O-Ring Sizes - AS568 Standard - Complete Gasket Solutions
O-Ring Groove Design Metric | Seal & Design, Inc
IS 6838: Dimensions for 'O' rings and grooves for vacuum flanges : Bureau of Indian Standards : Free Download, Borrow, and Streaming : Internet Archive
International O-Ring Size Standards
O-Ring SS Standard | MUSASHI OILSEAL | MISUMI South East Asia