Product Description
Backup Rings
- Size#438 - 6-1/4 ID x 6-3/4 OD x 1/4 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.
- Price is $2.40 each
