Locknut SKINTOP® GMP-HF-M 63X1.5 RAL7035 LGY, locknut, M 63, wrench size: 75mm, 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 drop formation