The Parker CPI / A-LOK NPT Thread to SAE Straight Thread Adapter (FHOA) is an adapter that connects an NPT thread to an SAE straight thread (O-ring seal). It comes in 5 size combinations with NPT thread sizes from 1/4" to 1".
| Type | NPT thread to SAE straight thread adapter: NPT thread and SAE straight thread |
| Part Numbers | CPI 4-4 FHOA, A-LOK 4-4 FHOA ~ CPI 16-16 FHOA, A-LOK 16-16 FHOA |
| 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 |
| Port | For use with SAE J.1926/1 ports; can also be used with MS-16142 ports |
| O-Rings | NBR O-rings are supplied as standard; for fluorocarbon O-rings add the suffix -VO to the part number (other O-rings available upon request) |
| Sizes (inches): NPT thread size, thread size, O-ring size by CPI Part Number (A-LOK Part Number) | 4-4 FHOA (4-4 FHOA): NPT thread size 1/4-18, thread size 7/16-20, O-ring size 3-904 / 6-6 FHOA (6-6 FHOA): NPT thread size 3/8-18, thread size 9/16-18, O-ring size 3-906 / 8-8 FHOA (8-8 FHOA): NPT thread size 1/2-14, thread size 3/4-16, O-ring size 3-908 / 12-12 FHOA (12-12 FHOA): NPT thread size 3/4-14, thread size 1-1/16-12, O-ring size 3-912 / 16-16 FHOA (16-16 FHOA): NPT thread size 1-11-1/2, thread size 1-5/16-12, O-ring size 3-916 |