Carbon Steel Cap Nuts

Product  introduction

Carbon steel cap nuts are made of high-quality medium carbon steel and undergo heat treatment processes such as quenching and tempering, providing high strength and good toughness. They can withstand significant pressure and tension, ensuring stable and reliable connections in high-intensity work scenarios like mechanical assembly and construction.​

The unique cap – type structure with a closed top effectively blocks dust and debris, protecting the bolt threads from wear and corrosion. The smooth surface prevents scratches and enhances the appearance of the connection area. The nuts precisely match the bolts with standard thread profiles, offering excellent anti-loosening performance after tightening, ensuring they remain secure over time.​

Available in various strength grades, ranging from 4.8 to 10.9, these nuts meet different engineering requirements. With thread sizes ranging from M3 to M36, they satisfy diverse installation needs. The surface is treated with anti-rust processes such as galvanizing, blackening, and Dacromet, significantly improving corrosion resistance, making them suitable for general industrial environments and outdoor applications. Widely used in industries like automotive manufacturing, mechanical equipment, and steel structure engineering, our products are manufactured and tested in strict accordance with GB national standards and ISO international standards. Our professional technical team provides one-stop services including selection consultation and installation guidance, offering customers cost-effective fastening solutions.

Product information

Productname: Carbon Steel Cap Nuts

Grade:  4.8 8.8 10.9 12.9 

Surface treatment：Black oxide、Galvanized、Dacromet etc.

Material: Carbon Steel

Specification: M3 -M36

Standard:  GB/T923 DIN1587