Concentric bushing, standard head, 303 stainless steel, delivered together with W guide wheels
| 3 | Size | |
| Standard | Head Profile | |
| Concentric (stationary) | Adjustability | |
| Inch | Unit version |
| HS | 19.05 mm | Head size |
| LO | 25.146 mm | Overall height |
| HH | 9.525 mm | Head thickness |
| THH | ±.001"(±0.025mm) | Tolerance head thickness |
| MV | 17.4752 mm | Mounting surface to wheel vee |
| OD | 11.9939 mm | Wheel mounting diameter |
| TOD | +0/-0.001"(+0/-0.025mm) | Tolerance wheel mounting diameter |
| LB | 15.621 mm | Wheel mounting length |
| ID | 7.9375 mm | Mounting hole diameter |
| TID | +0.002/-0.001"(+0.051/-0.025mm) | Tolerance Mounting hole diameter |
| m | 25 g | Weight |
| 5/16 | Recommended mounting fasteners |
| BWC | PBC | SCHATZ | QBC |
| B3SS B3 | MVB3 | BS3 | BASCOM–BC3 |
