Product Description (English, Concise & Professional)

Carbon Steel Black Oxide Hex Nuts DIN934, Precision Hexagonal Fastener Nuts for Mechanical Assembly

High-precision carbon steel hex nuts with black oxide finish, manufactured according to DIN934 standard. Featuring accurate thread, tight tolerance and stable locking performance, ideal for general machinery and equipment fastening.

Our black oxide hex nuts are made of high-quality carbon steel with professional heat treatment, ensuring high hardness, strong wear resistance and perfect assembly stability.

With precisely machined threads, these hex nuts provide smooth installation, firm connection and excellent repeatable fitting performance. The black oxide surface delivers a stable friction coefficient, avoids dimension changes, and is widely used for indoor mechanical assembly, equipment frames, tooling and structural fastening.

ApplicationSuitable for mechanical equipment, automation machinery, molds, electrical appliances and industrial structural connections.

Custom sizes and bulk orders are available. Material Test Certificate (MTC) can be provided on request.