Detailed Description
NB70BK58-OR-258 is a Black, 70 Shore A, NBR (Nitrile, Buna-N) O-Ring. It is a 70 durometer NBR (Nitrile, Buna-N). NB70BK58-OR-258 is AS568 size -258 O-Ring also referred to as 3.53mm (Cross Sectional Diameter (CS)) x 151.99mm (Inside Diameter (ID)).
Material: 70 Durometer NBR NB70BK58 O-Ring
Size: AS568 -258, 3.53mm CS X 151.99mm ID (0.139" CS X 5.984" ID)

| Technical Specification | Value |
|---|---|
| Compound Number | NB70BK58 |
| Material | NBR (Nitrile, Buna-N) |
| Color | Black |
| Durometer | 70 Shore A Hardness |
| Geometry Specifications | |
| Cross Sectional Geometry | O-Ring |
| Size Standard | AS568 |
| Size | -258 |
| Cross Section (CS) | 3.53 mm / 0.139 in |
| Inside Diameter (ID) | 151.99 mm / 5.984 in |




