Left hand thread bolt Stainless steel Hexagonal Counterclockwise Reverse Thread Hex head bolt M4 M5 M6 M8 M10
BIKE IT Mirror Adapter/Extender - M8 (Male Standard Thread to Female Reverse Thread) :: £6.99 :: Motorcycle Parts :: MIRRORS :: WHATEVERWHEELS LTD - ATV, Motorbike & Scooter Centre - Lancashire's Best
Left-handed and right-handed fastener threads: Everything you need to know | Essentra Components UK
Headless Screw with Right Hand/Left Hand Thread - Jakob