Concentric bushing, standard head, 303 stainless steel, delivered together with W guide wheels
| 4 | Size | |
| Standard | Head Profile | |
| Concentric (stationary) | Adjustability | |
| Inch | Unit version |
| HS | 22.35 mm | Head size |
| LO | 29.896 mm | Overall height |
| HH | 11.100 mm | Head thickness |
| THH | ±.001"(±0.025mm) | Tolerance head thickness |
| MV | 20.6248 mm | Mounting surface to wheel vee |
| OD | 14.9962 mm | Wheel mounting diameter |
| TOD | +0/-0.001"(+0/-0.025mm) | Tolerance wheel mounting diameter |
| LB | 18.796 mm | Wheel mounting length |
| ID | 9.525 mm | Mounting hole diameter |
| TID | +0.002/-0.001"(+0.051/-0.025mm) | Tolerance Mounting hole diameter |
| m | 42.4 g | Weight |
| 3/8 | Recommended mounting fasteners |
| BWC | PBC | SCHATZ | QBC |
| B4SS B4 | MVB4 | BS4 | BASCOM–BC4 |
