303 Series - Dimcogray round fluted knob
| Part N° | Material | Unit system | Fastening gender | A | B | C | D | Thread length | Thread size |
| 1-303-001 | Phenolic | Imperial | Female | 2-3/8 | 1-1/8 | 1-3/4 | 7/16 | 1/2 | 3/8-16 |
| 1-303-012 | Phenolic | Imperial | Female | 2-3/8 | 1-1/8 | 1-3/4 | 7/16 | 5/8 | 1/2 |
| 1-303-014 | Phenolic | Imperial | Female | 2-3/8 | 1-1/8 | 1-3/4 | 7/16 | 1/2 | 3/8 |
| 1-303-015 | Phenolic | Imperial | Female | 2-3/8 | 1-1/8 | 1-3/4 | 7/16 | 3/8 | 3/16 |
| 1-303-016 | Phenolic | Imperial | Female | 2-3/8 | 1-1/8 | 1-3/4 | 7/16 | 1/2 | 3/8 |