HIGH QUALITY MATERIAL: 100% Stainless steel 304(18-8) which is superior to regular steel and any zinc plated fasteners Pouilzx Acorn Hex Cap Nuts - 100 Pcs M3 Dome Nuts Nylon Hexagon Decorative Cap Nut For Screws Bolts White Coarse Thread UNC Nuts Uxcell #8-32 Acorn Cap Nuts,100pcs - 304 Stainless Steel Hardware Nuts Mcmaster Carr M3 Cap Nut Package Included: Acorn Cap Hex Nuts M3-0.5mm x 100 PCS About Acorn Cap Nuts Acorn nut are hex nuts with a domed top to cover the end of the bolt tip so to protect the thread and provides a finished appearance The exposed threads should not be longer than the inside height of the cap nut. Like flange nuts, acorn nuts must be tightened with a tool. Eastlo Fastener's acorn cap nut is known for... Nut TypeAcorn Hex Cap Nuts Metric M3 (100 pieces) The stainless nuts are 100% stainless steel 18-8 (304) which offers a high level of chemical and corrosion resistance. Stainless six sided nuts are great for general applications and wet environments International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.