Backup Rings Buna Size 278 Price for 1 pc

Backup Rings

Size#278 = 12 ID x 12-1/4 OD x 1/8 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.

Color Black

90 Durometer hardness

Price is for each