The Parker CPI / A-LOK NPT Female Connector (GBZ / FSC) connects a fractional tube to an NPT female thread. It comes in 33 size combinations with tube outer diameters from 1/16" to 2". CPI uses a single ferrule and A-LOK a double ferrule.
| Type | NPT female connector: connects a fractional tube to an NPT female thread |
| Part Numbers | CPI 1-1 GBZ, A-LOK 1FSC1N ~ CPI 32-32 GBZ, A-LOK 32FSC32N |
| 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 |
| Note | Sizes 20, 24 and 32 require additional lubrication prior to assembly |
| Sizes (inches): Tube O.D. and NPT Thread Size by CPI Part Number (A-LOK Part Number) | 1-1 GBZ (1FSC1N): tube 1/16" x NPT 1/16" / 1-2 GBZ (1FSC2N): tube 1/16" x NPT 1/8" / 2-2 GBZ (2FSC2N): tube 1/8" x NPT 1/8" / 2-4 GBZ (2FSC4N): tube 1/8" x NPT 1/4" / 3-2 GBZ (3FSC2N): tube 3/16" x NPT 1/8" / 3-4 GBZ (3FSC4N): tube 3/16" x NPT 1/4" / 4-2 GBZ (4FSC2N): tube 1/4" x NPT 1/8" / 4-4 GBZ (4FSC4N): tube 1/4" x NPT 1/4" / 4-6 GBZ (4FSC6N): tube 1/4" x NPT 3/8" / 4-8 GBZ (4FSC8N): tube 1/4" x NPT 1/2" / 5-2 GBZ (5FSC2N): tube 5/16" x NPT 1/8" / 5-4 GBZ (5FSC4N): tube 5/16" x NPT 1/4" / 5-6 GBZ (5FSC6N): tube 5/16" x NPT 3/8" / 6-2 GBZ (6FSC2N): tube 3/8" x NPT 1/8" / 6-4 GBZ (6FSC4N): tube 3/8" x NPT 1/4" / 6-6 GBZ (6FSC6N): tube 3/8" x NPT 3/8" / 6-8 GBZ (6FSC8N): tube 3/8" x NPT 1/2" / 6-12 GBZ (6FSC12N): tube 3/8" x NPT 3/4" / 8-4 GBZ (8FSC4N): tube 1/2" x NPT 1/4" / 8-6 GBZ (8FSC6N): tube 1/2" x NPT 3/8" / 8-8 GBZ (8FSC8N): tube 1/2" x NPT 1/2" / 8-12 GBZ (8FSC12N): tube 1/2" x NPT 3/4" / 10-6 GBZ (10FSC6N): tube 5/8" x NPT 3/8" / 10-8 GBZ (10FSC8N): tube 5/8" x NPT 1/2" / 10-12 GBZ (10FSC12N): tube 5/8" x NPT 3/4" / 12-8 GBZ (12FSC8N): tube 3/4" x NPT 1/2" / 12-12 GBZ (12FSC12N): tube 3/4" x NPT 3/4" / 14-12 GBZ (14FSC12N): tube 7/8" x NPT 3/4" / 16-12 GBZ (16FSC12N): tube 1" x NPT 3/4" / 16-16 GBZ (16FSC16N): tube 1" x NPT 1" / 20-20 GBZ (20FSC20N): tube 1-1/4" x NPT 1-1/4" / 24-24 GBZ (24FSC24N): tube 1-1/2" x NPT 1-1/2" / 32-32 GBZ (32FSC32N): tube 2" x NPT 2" |