Contoured Back-up Ring Kit

Contoured back up rings are anti-extrusion devices, generally recommended when systemic pressure exceeds 1500 psi. The use of  back up rings can also extend the life of O-rings in these high pressure operating environments.  RT/Dygert's contoured back-up rings are molded from a special high modulus, oil resistant 90 durometer nitrile (Buna-N) compound.

This 36 compartment kit contains a total of 293 back up rings in 36 different sizes.  Included is a contents identification card with dimensions of each ring on one side and silhouettes on the other.
 
Material: 90 durometer nitrile

Sizes and quantities include:

10 each of the following sizes: 005, 006, 007, 008, 009, 010, 011, 012,013, 014, 015,
10 each of the following sizes: 016, 017, 018, 110, 111, 112, 113, 114, 115, 116
 7 each of the following sizes: 210, 211, 212, 213
 6 each of the following sizes: 117, 118, 119, 120, 121, 214, 215, 216, 217, 218, 219