278 Series - Dimcogray knob tapered handle knob
| Part N° | Material | Unit system | Fastening gender | A | B | C | Thread length | Thread size |
| 1-278-001 | Phenolic | Imperial | Female | 1 | 1-3/8 | 1/2 | 5/16 | 10-32 |
| 1-278-014 | Phenolic | Imperial | Female | 1 | 1-3/8 | 1/2 | 5/16 | 8-32 |
| 1-278-015 | Phenolic | Imperial | Female | 1 | 1-3/8 | 1/2 | 7/16 | 1/4-20 |
| 1-278-016 | Phenolic | Imperial | Female | 1 | 1-3/8 | 1/2 | 7/16 | 5/16-18 |
| 1-278-022 | Phenolic | Imperial | Female | 1 | 1-3/8 | 1/2 | 5/16 | 10-24 |
| 1-278-026 | Phenolic | Imperial | Female | 1 | 1-3/8 | 1/2 | 1/2 | 3/8-16 |