Acorn nut caps for bolts and nuts from M5 to M30 in Black, Grey, White, and Anthracite, available in sets of 5, 10, 25, 50, or 100 pieces. Made from high-quality, UV-resistant PE polyethylene, these caps are durable, weatherproof, and protect against corrosion. Designed with precision, they feature a hexagonal tab for a secure fit and a polished finish. Ideal for protecting bolts in construction, machinery, furniture, playgrounds, and garden architecture. Easy clip-on installation ensures a snug and reliable fit without tools.