The lock nut supplied is not a lock nut. It is only screwed onto the filter. It has no steps that engage the bottom of the filter housing. So the filter doesn't stay in place. Unfortunately I didn't keep the original nut.
Dyson V8 Absolute: The Ultimate Cordless Vacuum for Effortless Cleaning
142 Review
Xiaomi Mi Robot Vacuum-Mop 2 Lite RU robot vacuum cleaner, white
198 Review
iRobot Roomba 692: Smart Robot Vacuum with Wi-Fi, π€ Alexa Compatibility, and Pet-Friendly Features for Effortless Cleaning on Any Surface
138 Review
Vacuum cleaner Deerma DX700, white
240 Review