The Parker CPI / A-LOK Table Nut (BZ / NU) is a table nut for fractional tubes. It comes in 14 sizes from 1/16" to 2".
| Type | Table nut |
| Part Numbers | CPI 1 BZ, A-LOK 1NU1 ~ CPI 32 BZ, A-LOK 32NU32 |
| Material | 316 stainless steel (heat code traceable) is standard / Other materials: steel, brass, aluminum, nickel-copper, Hastelloy C, Alloy 600, titanium, 6Mo, Incoloy 625 and 825 |
| Material Codes | Material code added to the end of the part number after a hyphen: B brass / SS or 316 = 316 stainless steel / S steel / A aluminum / M Alloy 400 / HC Hastelloy C-276 / IN Alloy 600 / SS20 Carpenter 20 / 6MO 6Mo / 625 / 825 / T titanium |
| Lubrication | For silver plated nuts of sizes 20, 24 and 32, apply a system-compatible lubricant to the fitting body threads and the inside back of the nuts |
| Sizes (inches): size by CPI Part Number (A-LOK Part Number) | 1 BZ (1NU1): 1/16" / 2 BZ (2NU2): 1/8" / 3 BZ (3NU3): 3/16" / 4 BZ (4NU4): 1/4" / 5 BZ (5NU5): 5/16" / 6 BZ (6NU6): 3/8" / 8 BZ (8NU8): 1/2" / 10 BZ (10NU10): 5/8" / 12 BZ (12NU12): 3/4" / 14 BZ (14NU14): 7/8" / 16 BZ (16NU16): 1" / 20 BZ (20NU20): 1-1/4" / 24 BZ (24NU24): 1-1/2" / 32 BZ (32NU32): 2" |