Cap Nuts, also known as acorn nuts, are specialized fasteners with a domed top that fully covers exposed bolt threads and heads. Our custom Cap Nuts comply with international standards such as DIN 1587 and ISO 1212, available in various materials and sizes to meet diverse industrial needs. The integrated domed design not only provides excellent corrosion protection by blocking dust, moisture and corrosive media, but also delivers a neat, polished appearance, making them ideal for visible fastening scenarios. We offer custom Cap Nuts with personalized specifications, surface treatments and materials, ensuring high precision, strong load-bearing capacity and long service life, widely used in construction, furniture, automotive and marine industries. Core keywords: Cap Nuts, acorn nuts, custom Cap Nuts.