520 Series - Dimcogray round knurled knob
| Part N° | Material | Unit system | Fastening gender | A | B | C | D | Thread length | Thread size |
| 4-520-001 | Thermoplastic | Imperial | Male | 1-7/8 | 17/32 | 3/4 | 3/16 | 1/2 | 1/4-20 |
| 4-520-002 | Thermoplastic | Imperial | Male | 1-7/8 | 17/32 | 3/4 | 3/16 | 1 | 1/4-20 |
| 4-520-003 | Thermoplastic | Imperial | Male | 1-7/8 | 17/32 | 3/4 | 3/16 | 3/4 | 5/16-18 |
| 4-520-004 | Thermoplastic | Imperial | Male | 1-7/8 | 17/32 | 3/4 | 3/16 | 1-1/2 | 5/16-18 |