250 Series - Dimcogray recessed top push/pull knob
| Part N° | Material | Unit system | Fastening gender | A | B | C | D | Thread length | Thread size |
| 1-250-002 | Phenolic | Imperial | Female | 1-13/16 | 1 | 5/8 | 7/8 | 7/16 | 1/4-20 |
| 1-250-003 | Phenolic | Imperial | Female | 1-13/16 | 1 | 5/8 | 7/8 | 7/16 | 5/16-18 |
| 1-250-007 | Phenolic | Imperial | Female | 1-13/16 | 1 | 5/8 | 7/8 | 1/2 | 3/8-24 |
| 1-250-008 | Phenolic | Imperial | Female | 1-13/16 | 1 | 5/8 | 7/8 | 1/2 | 3/8-16 |
| 1-250-015 | Phenolic | Imperial | Female | 1-13/16 | 1 | 5/8 | 7/8 | 5/16 | 10-32 |
| 1-250-017 | Phenolic | Imperial | Male | 1-13/16 | 1 | 5/8 | 7/8 | 1/2 | 3/8-16 |