Locknut SKINTOP® GMP-HF-M 12X1.5 RAL7035 LGY, locknut, M 12, wrench size: 17mm, light grey, polyamide, halogen-free, , Application areas: subways, airports, public buildings, tunnels, Benefits: halogen-free, extremely flame-retardant according to UL 94 V0, self-extinguishing, no dripping