574 Back-Up Rings

574 Back-Up Rings

Molded of 90A Durometer Buna-N Rubber, these 'Parback®' Style Dished Cross Section back-up rings provide excellent extrusion resistance. Stretched for installation, they return quickly to their original size for easy installation. 
NOTE: Sizes (Dash No.) corresponds to standard O-ring numbers.

SEAL INFORMATION
MATERIAL 90A BUNA-N RUBBER
TEMPERATURE RANGE -40° TO +240°F
PRESSURE RANGE VARIES ACCORDING TO DIAMETRAL CLEARANCE
PART NUMBER (Prefix) - (Dash No.)
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