The Parker CPI / A-LOK NPT Female Branch Tee (OBZ / FBT) is a tee with tube connections on both ends of the run and an NPT female thread on the branch. It comes in 14 size combinations with tube outer diameters from 1/8" to 1". CPI uses a single ferrule and A-LOK a double ferrule.
| Type | NPT female branch tee: tube connections on the run, NPT female thread on the branch |
| Part Numbers | CPI 2-2-2 OBZ, A-LOK 2FBT2N ~ CPI 16-16-16 OBZ, A-LOK 16FBT16N |
| Thread | NPT |
| Size Numbers | Size numbers in the part number are in sixteenths of an inch (for example 1/2" tube = 8, 1/4" thread = 4) |
| Connection Method | CPI: single ferrule / A-LOK: double ferrule |
| 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 |
| Sizes (inches): Tube O.D. and NPT Thread Size by CPI Part Number (A-LOK Part Number) | 2-2-2 OBZ (2FBT2N): tube 1/8" x NPT 1/8" / 3-3-2 OBZ (3FBT2N): tube 3/16" x NPT 1/8" / 4-4-2 OBZ (4FBT2N): tube 1/4" x NPT 1/8" / 4-4-4 OBZ (4FBT4N): tube 1/4" x NPT 1/4" / 5-5-2 OBZ (5FBT2N): tube 5/16" x NPT 1/8" / 6-6-4 OBZ (6FBT4N): tube 3/8" x NPT 1/4" / 8-8-4 OBZ (8FBT4N): tube 1/2" x NPT 1/4" / 8-8-6 OBZ (8FBT6N): tube 1/2" x NPT 3/8" / 8-8-8 OBZ (8FBT8N): tube 1/2" x NPT 1/2" / 10-10-8 OBZ (10FBT8N): tube 5/8" x NPT 1/2" / 12-12-12 OBZ (12FBT12N): tube 3/4" x NPT 3/4" / 14-14-12 OBZ (14FBT12N): tube 7/8" x NPT 3/4" / 16-16-12 OBZ (16FBT12N): tube 1" x NPT 3/4" / 16-16-16 OBZ (16FBT16N): tube 1" x NPT 1" |