203 Series - Dimcogray recessed top fluted knob
| Part N° | Material | Unit system | Fastening gender | A | B | C | D | Thread length | Thread size |
| 1-203-007 | Phenolic | Imperial | Female | 1-3/4 | 15/16 | 1-1/16 | 1/2 | 1/2 | 3/8-16 |
| 1-203-008 | Phenolic | Imperial | Male | 1-3/4 | 15/16 | 1-1/16 | 1/2 | 1-3/8 | 7/16-20 |
| 1-203-009 | Phenolic | Imperial | Male | 1-3/4 | 15/16 | 1-1/16 | 1/2 | 1-3/8 | 5/16-18 |
| 1-203-013 | Phenolic | Imperial | Female | 1-3/4 | 15/16 | 1-1/16 | 1/2 | 15/32 | 1/4 |