Trelleborg OR-NBR-50x4 NBR O-Ring 50mm ID x 4mm cross section. Pack of 25 pieces. Large format O-Ring for cylinder heads, large valve covers, and flange sealing. Wear-part interchangeable across the OEM installed base; specify by original equipment manufacturer reference to avoid dimensional mismatch.
| Material | NBR 70 Shore A |
| Standard | ISO 3601 |
| Standard size | 50x4 |
| Temperature range | -30C to +120C |
| Approval | FDA 21 CFR 177.2600, NORSOK M-710, NACE TM0297, WRAS |
| Standards | NACE TM0297, ISO 3601, ISO 3601-1, AS568 |
| Approvals | WRAS |
| HS code | 4016.93 |
| Material | NBR 70 Shore A |
| Temperature range | -30C to +120C |
| Primary standard | ISO 3601 |
| Standard size | 50x4 |
| MOQ | 1 |
Metric NBR 70 Shore A O-ring. Trelleborg Sealing Solutions offers this dimension in NBR; consult the O-Rings & Back-up Rings catalog (profile G, metric).