8-257H55
55D Hytrel Back-Up Ring, 5.893 X 6.129 X 0.118, Dash# 257
Part #:
8-257H55
Min. Order Qty: 1
Brand: HPSI
HPSI
The 8-H55 back-up rings are molded from 55D durometer Hytrel, offering excellent extrusion resistance and compatibility with phosphate esters, hydraulic oils, and water. Designed with a flat cross-section, these back-up rings help extend O-ring life in high-pressure applications. They stretch for easy installation and quickly return to their original size. Sized to standard AS568 O-ring dash numbers for reliable compatibility.
| Construction | : | Solid |
| Dash Number | : | -257 |
| Inside Diameter | : | 5.893 in |
| Material | : | 55D Hytrel |
| Outside Diameter | : | 6.129 in |
| Part Number | : | (Prefix)-(O-Ring Dash#)(Material) |
| Temperature Range | : | -65° to 275°F |
| Width | : | 0.118 in |
- Enhances O-ring performance in high-pressure applications
- Resistant to phosphate esters, hydraulic oils, and water
- Stretches for easy insallation
- Compatible with standard AS568 O-ring dash numbers
