253 Series - Dimcogray round fluted knob
| Part N° | Material | Unit system | Fastening gender | A | B | C | Thread length | Thread size |
| 1-253-062 | Phenolic | Imperial | Female | 1-3/4 | 3/4 | 3/4 | 3/4 | 5/16-18 |
| 1-253-092 | Phenolic | Imperial | Female | 1-3/4 | 3/4 | 3/4 | 7/16 | 1/2-13 |
| 1-253-108 | Phenolic | Imperial | Female | 1-3/4 | 3/4 | 3/4 | 3/8 | 1/2-20 |
| 1-253-126 | Phenolic | Imperial | Female | 1-3/4 | 3/4 | 3/4 | 3/8 | 1/4-20 |
| 1-253-130 | Phenolic | Imperial | Male | 1-3/4 | 3/4 | 3/4 | 3 | 3/8-16 |
| 1-253-132 | Phenolic | Imperial | Male | 1-3/4 | 3/4 | 3/4 | 3-3/4 | 1/4-20 |
| 1-253-133 | Phenolic | Imperial | Male | 1-3/4 | 3/4 | 3/4 | 2-3/4 | 5/16-18 |
| 2-253-300 | Phenolic | Imperial | Female | 1-3/4 | 3/4 | 3/4 | 3/8 | 3/8-16 |
| 2-253-302 | Phenolic | Imperial | Female | 1-3/4 | 3/4 | 3/4 | 3/8 | 5/16-18 |
| 2-253-304 | Phenolic | Imperial | Male | 1-3/4 | 3/4 | 3/4 | 1-1/2 | 3/8-16 |