301 Series - Dimcogray Recessed top fluted knob
| Part N° | Material | Unit system | Fastening gender | A | B | C | D | Thread length | Thread size |
| 1-301-005 | Phenolic | Imperial | Female | 2-3/8 | 15/16 | 1-3/4 | 7/16 | 1/2 | 3/8-16 |
| 1-301-009 | Phenolic | Imperial | Female | 2-3/8 | 15/16 | 1-3/4 | 7/16 | 7/16 | 1/2-13 |
| 1-301-010 | Phenolic | Imperial | Female | 2-3/8 | 15/16 | 1-3/4 | 7/16 | 3/4 | 1/2 |
| 1-301-014 | Phenolic | Imperial | Male | 2-3/8 | 15/16 | 1-3/4 | 7/16 | 7/8 | 3/8-16 |
| 1-301-015 | Phenolic | Imperial | Female | 2-3/8 | 15/16 | 1-3/4 | 7/16 | 1/2 | 5/16 |