239 Series - Dimcogray round fluted knob
| Part N° | Material | Unit system | Fastening gender | A | B | C | D | Thread length | Thread size |
| 1-239-002 | Phenolic | Imperial | Female | 3-15/64 | 1-1/2 | 2 | 7/8 | 5/8 | 1/2-13 |
| 1-239-004 | Phenolic | Imperial | Female | 3-15/64 | 1-1/2 | 2 | 7/8 | 1 | 1/2 |
| 1-239-006 | Phenolic | Imperial | Female | 3-15/64 | 1-1/2 | 2 | 7/8 | 1 | 3/8 |
| 1-239-013 | Phenolic | Imperial | Female | 3-15/64 | 1-1/2 | 2 | 7/8 | 1 | 5/8 |
| 1-239-017 | Phenolic | Imperial | Female | 3-15/64 | 1-1/2 | 2 | 7/8 | 1 | 7/8 |