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Used primarily as an anti-extrusion device for u-seals, these back-up rings combine high performance with very low friction. “ST” suffix designates a split ring.

PTFE Material | 5 1/4 in Nominal Inner Diameter | Backup Ring

Features

• High strength and abrasion resistance
• Wide temperature range
• Chemical resistance
• Low friction
• Easy installation

These back-up rings, made from urethane or nylon, are commonly used as spacers for u-seals.

70 Shore D Durometer | Urethane Material | 5 1/4 in Nominal Inner Diameter | Modular Back-Ups

Features

• High strength and abrasion resistance
• Wide temperature range
• Chemical resistance
• Low friction
• Easy installation