The Parker CPI / A-LOK Bulkhead Locknut for SAE Adjustable Straight Thread (WLN) is a bulkhead locknut for SAE adjustable straight threads. It comes in 5 sizes from 1/4" to 1".
| Type | Bulkhead locknut: SAE adjustable straight thread |
| Part Numbers | 4 WLN ~ 16 WLN |
| 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): thread size, tube O.D. by Part Number | 4 WLN: thread size 7/16-20, tube 1/4" / 6 WLN: thread size 9/16-18, tube 3/8" / 8 WLN: thread size 3/4-16, tube 1/2" / 12 WLN: thread size 1-1/16-12, tube 3/4" / 16 WLN: thread size 1-5/16-12, tube 1" |