1. Backup Rings - LEATHER

The 35803 dash numbers correspond with the last three digits of the O'ring part numbers.
6244 dash numbers correspond with 6230 series O'rings.
6246 dash numbers correspond with 6227 series O'rings.
28777 (6291) dash numbers correspond with 6290 series O'rings.

Back-Up Rings extend the service life of the o'rings and also extend the pressure range over which synthetic rubber o'rings perform their sealing function. They prevent o'ring extrusion and nibbling and should be used where large clearance gaps or high pressures are necessary.

Leather Back-Up Rings may be used in all packing applications. They are high in tensile strength and resistant to heat and wear. Leather has a range of -30 degrees F to +150 degrees F.

| Custom | Leather | Parker 8-Dashs | Rubber | Teflon |