The Parker CPI / A-LOK NPT Male Run Tee (RBZ / MRT) is a tee with two tube connections and one NPT male thread, the thread being on one end of the run. It comes in 16 size combinations with tube outer diameters from 1/8" to 1". CPI uses a single ferrule and A-LOK a double ferrule.
| Type | NPT male run tee: two tube connections and one NPT male thread |
| Part Numbers | CPI 2-2-2 RBZ, A-LOK 2MRT2N ~ CPI 16-16-16 RBZ, A-LOK 16MRT16N |
| 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 |
| Size Designation | Run ends (1 to 2) first, then the branch (3): a male run tee for 3/8" tube and 1/4" male pipe thread is 6-4-6 |
| Sizes (inches): Tube O.D. and NPT Thread Size by CPI Part Number (A-LOK Part Number) | 2-2-2 RBZ (2MRT2N): tube 1/8" x NPT 1/8" / 2-4-2 RBZ (2MRT4N): tube 1/8" x NPT 1/4" / 3-2-3 RBZ (3MRT2N): tube 3/16" x NPT 1/8" / 4-2-4 RBZ (4MRT2N): tube 1/4" x NPT 1/8" / 4-4-4 RBZ (4MRT4N): tube 1/4" x NPT 1/4" / 5-2-5 RBZ (5MRT2N): tube 5/16" x NPT 1/8" / 5-4-5 RBZ (5MRT4N): tube 5/16" x NPT 1/4" / 6-4-6 RBZ (6MRT4N): tube 3/8" x NPT 1/4" / 6-6-6 RBZ (6MRT6N): tube 3/8" x NPT 3/8" / 8-6-8 RBZ (8MRT6N): tube 1/2" x NPT 3/8" / 8-8-8 RBZ (8MRT8N): tube 1/2" x NPT 1/2" / 10-8-10 RBZ (10MRT8N): tube 5/8" x NPT 1/2" / 12-12-12 RBZ (12MRT12N): tube 3/4" x NPT 3/4" / 14-12-14 RBZ (14MRT12N): tube 7/8" x NPT 3/4" / 16-12-16 RBZ (16MRT12N): tube 1" x NPT 3/4" / 16-16-16 RBZ (16MRT16N): tube 1" x NPT 1" |