This is a Arrma 4mm Silver Nyloc M4 Flanged Locknut Set, for use with Arrma Senton, Granite and Bigrock 4x4 kits. These Flanged Nyloc Nuts provide an ideal replacement part for your kit items.
Features:
Precision manufactured from high-quality materials for a long service life
Nyloc insert to prevent loosening
Serrated flange bites into wheel surface to provide a secure fit