------Question for OS-SCH-30X50X8 Please Put your question below------
is this seal Buna-n over a steel core?
Hello @tbartholomew and welcome to the TechForum!
The OS-SCH-30X50X8 is a Type SC seal single lip, Buna-N rubber wrapped OD, with a carbon steel spring.
You can find more details located HERE.
Best regards!