The Parker CPI / A-LOK Knurled Nut (BZP) is a knurled nut for soft plastic tubing. It comes in 8 sizes from 1/16" to 5/8".
| Type | Knurled nut |
| Part Numbers | 1 BZP ~ 10 BZP |
| Use | Replaces BZ/NU nuts on CPI / A-LOK fitting bodies; designed for soft plastic tubing on low pressure applications where a finger tight assembly procedure is satisfactory |
| Assembly | Insert the plastic tubing until it bottoms in the fitting body and tighten finger tight |
| Sizes (inches): tube O.D. by Part Number | 1 BZP: tube 1/16" / 2 BZP: tube 1/8" / 3 BZP: tube 3/16" / 4 BZP: tube 1/4" / 5 BZP: tube 5/16" / 6 BZP: tube 3/8" / 8 BZP: tube 1/2" / 10 BZP: tube 5/8" |