8-439H55
55D Hytrel Back-Up Ring, 6.524 X 6.996 X 0.236, Dash# 439
Part #:
8-439H55
Min. Order Qty: 1
Brand: HPSI
HPSI
55D Hytrel Back-Up Rings are molded from 55D durometer Hytrel® and provide excellent extrusion resistance for high-pressure sealing applications. The material is compatible with phosphate esters, hydraulic oils, and water, while the flat cross-section provides reliable support for the O-ring and helps extend seal life. These back-up rings 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 | : | -439 |
| Inside Diameter | : | 6.524 in |
| Material | : | 55D Hytrel |
| Outside Diameter | : | 6.996 in |
| Part Number | : | (Prefix)-(O-Ring Dash#)(Material) |
| Temperature Range | : | -65° to 275°F |
| Width | : | 0.236 in |
- 55D Hytrel® construction provides excellent extrusion resistance
- Designed to help prevent O-ring extrusion in high-pressure applications
- Flat cross-section provides reliable O-ring support
- Compatible with phosphate esters, hydraulic oils, and water
- Helps extend O-ring service life
- Stretchable design supports easy installation
- Quickly returns to original size after installation
- Standard AS568 O-ring dash-number sizing
