231 Series - Dimcogray round fluted knob
| Part N° | Material | Unit system | Fastening gender | A | B | C | D | Thread length | Thread size |
| 1-231-001 | Phenolic | Imperial | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 7/16 | 1/4-20 |
| 1-231-002 | Phenolic | Imperial | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 7/16 | 5/16-18 |
| 1-231-003 | Phenolic | Imperial | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 1/2 | 3/8-16 |
| 1-231-004 | Phenolic | Imperial | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 1/2 | 3/8-24 |
| 1-231-005 | Phenolic | Imperial | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 5/8 | 1/2-13 |
| 1-231-006 | Phenolic | Imperial | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 5/8 | 1/2-20 |
| 1-231-007 | Phenolic | Imperial | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 3/4 | 5/8-18 |
| 1-231-064 | Phenolic | Imperial | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 1/2 | 3/8 |
| 1-231-091 | Phenolic | Imperial | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 3 | 1/2-13 |
| 1-231-123 | Phenolic | Imperial | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 5/8 | 1/2 |
| 1-231-136 | Phenolic | Imperial | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 2 | 1/2-13 |
| 1-231-139 | Phenolic | Imperial | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 1-1/4 | 3/8-16 |
| 1-231-143 | Phenolic | Imperial | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 1 | 3/8-16 |
| 1-231-160 | Phenolic | Imperial | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 2 | 3/8-16 |
| 1-231-166 | Phenolic | Imperial | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 1 | 1/2-13 |
| 1-231-182 | Phenolic | Imperial | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 1 | 5/16-18 |
| 1-231-183 | Phenolic | Imperial | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 5/8 | 5/16-18 |
| 1-231-188 | Phenolic | Imperial | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 3 | 3/8-16 |
| 1-231-192 | Phenolic | Imperial | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 3/4 | 3/8-16 |
| 1-231-198 | Phenolic | Imperial | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 1-3/4 | 5/16-18 |
| 1-231-199 | Phenolic | Imperial | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 5/8 | 5/8-11 |
| 1-231-228 | Phenolic | Imperial | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 1-1/2 | 3/8-16 |
| 1-231-229 | Phenolic | Imperial | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 3/4 | 3/8-16 |
| 1-231-279 | Phenolic | Imperial | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 3/4 | 5/16 |
| 1-231-288 | Phenolic | Imperial | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 7/8 | 5/16-18 |
| 1-231-299 | Phenolic | Imperial | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 2-1/2 | 5/16-18 |
| 1-231-309 | Phenolic | Imperial | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 1/2 | 5/16-18 |
| 1-231-314 | Phenolic | Imperial | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 2-3/4 | 1/2-13 |
| 1-231-323 | Phenolic | Imperial | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 7/8 | 5/8 |
| 1-231-328 | Phenolic | Imperial | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 5/8 | 1/4 |
| 1-231-332 | Phenolic | Imperial | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 2 | 3/8-24 |
| 1-231-337 | Phenolic | Imperial | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 5-1/4 | 3/8-16 |
| 1-231-346 | Phenolic | Metric | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 12.7 | M10-1.5 |
| 1-231-371 | Phenolic | Imperial | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 2-7/16 | 5/16-18 |
| 1-231-372 | Phenolic | Metric | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 44.4 | M10-1.5 |
| 1-231-385 | Phenolic | Imperial | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 5/8 | 1/2 |
| 1-231-398 | Phenolic | Imperial | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 1-3/4 | 3/8-16 |
| 1-231-423 | Phenolic | Imperial | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 3/4 | 5/16-18 |
| 1-231-426 | Phenolic | Imperial | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 7/16 | 1/2-20 |
| 1-231-607 | Phenolic | Metric | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 11.1 | M8-1.25 |
| 1-231-608 | Phenolic | Metric | Female | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 15 | M12-1.75 |
| 1-231-612 | Phenolic | Metric | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 30 | M10-1.5 |
| 1-231-613 | Phenolic | Metric | Male | 2-3/8 | 1-5/16 | 1-1/4 | 5/8 | 25.4 | M12-1.75 |