without 2PCS Metric Round Die M3.5 * 0.6MM OD 20MM Dies Threading Tools Lathe Model Engineer Thread Maker 3.5 Mm X 0.6mm (Color : 0.6, Size : M3.5) : Amazon.co.uk: Business, Industry & Science
Silverline 3.5mm Re-threader Tool
Hand Threaders to make or repair M4 or M3.5 Thread