These M4 locknuts have a nylon insert that the threads of a mating screw must form threads in upon insertion. The displaced nylon will continue to hold tension on the screw threads which act as a locking mechanism to prevent the screw from loosening under vibration. While M4 is not a go-to in Actobotics®, they are sometimes necessary to have when utilizing parts from our metric build-system, goBILDA®.
Dual-Bearing Timing Belt Idler Pulley (4mm Bore, 18.5mm Diameter, 9.5mm Inside Width) - ServoCity®
2801 Series Zinc-Plated Steel Washer (4mm ID x 11mm OD) - 25 Pack
2901 Series Shock Mount (1-1) - 2 Pack - ServoCity
Plastic Hinge - 2 Pack
2913 Series Steel Ball Linkage (Male M4 x 0.7mm, 29.4mm Length) - 2 Pack - ServoCity
Thru-Hole Tetrix to Threaded goBILDA® Pattern Adaptor (16-11)
Threaded Tetrix to Thru-Hole goBILDA Pattern Adaptor (16-8)
3417 Series 5mm HTD Pitch Set-Screw Pinion Timing Belt Pulley (8mm REX™ Bore, 24 Tooth)
3408 Series V-Groove Pulley - 2 Pack - ServoCity®