8-421NY
Split Nylon Back-Up Ring, 4 X 4-1/2 X .070, Dash# 421
Part #:
8-421NY
Min. Order Qty: 1
Brand: HPSI
HPSI
8-NY split back-up rings serve as anti-extrusion devices for O-rings. They are also suitable for U-cups in non-standard diameters. Made from nylon, they provide low friction and reliable performance in demanding applications where high-temperature resistance is not required. Sized to both AS568 standard and non-standard diameters, they ensure compatibility across various sealing needs.
| Construction | : | Split |
| Dash Number | : | -421 |
| Inside Diameter | : | 4 in |
| Material | : | Nylon |
| Outside Diameter | : | 4-1/2 in |
| Part Number | : | (Prefix)-(O-Ring Dash#)(Material) |
| Temperature Range | : | -40° to 250°F |
| Thickness | : | .070 in |
- Prevents O-ring and U-cup extrusion in high-pressure applications
- Reduces wear and improves sealing performance
- Sized to AS568 O-ring dash numbers and non-standard diameters