Product Description
Backup Rings
- Size#309 = 7/16 ID x 13/16 OD x 3/16 CS
- Back-up rings are used in conjunction with O-ring for both static and dynamic sealing applications. They prevent extrusion of the O-ring when it is subjected to high pressures, or when the extrusion gaps are excessive. Wherever possible two Back-up rings should be used, one on each side of the O-ring. Black
- 90 Durometer hardness
Price is $0.08 each minimum purchase 20 pcs
