Black Oxide Allen Head Socket Cap Screws

Black Oxide Allen Head Socket Cap Screws belong to metric high-strength fasteners manufactured according to DIN912 standard. The raw material adopts medium carbon alloy steel, which obtains stable tensile strength after precise quenching and tempering heat treatment. The black oxide surface treatment can provide mild anti-rust performance under indoor dry working conditions, and the inner hexagonal drive structure enables the installation operation in narrow space. Ningbo Gangtong Zheli Fasteners Co., Ltd controls each production procedure from raw material incoming inspection to finished product dimension testing.

Product Performance Standard

Mechanical property of Black Oxide Allen Head Socket Cap Screws meets Class 8.8 and Class 10.9 industry standards. Hardness testing, torque testing and thread inspection will be carried out for every production batch. Threads are processed by precision rolling technology to ensure good fitting performance with matched nuts. The product is widely applied in engineering machinery, automation equipment, mold manufacturing and metal frame assembly fields.

Production & Quality Control

Complete independent production lines support customized dimension requirements for industrial purchasers. All dimension parameters strictly follow DIN912 specifications. Professional inspection tools including micrometer, hardness tester and thread gauge are equipped in the workshop for continuous quality monitoring. Ningbo Gangtong Zheli Fasteners Co., Ltd accepts sample testing before bulk orders for global hardware importers.

Application & Order Support

Industrial buyers can select standard sizes or put forward non-standard customized demands for Black Oxide Allen Head Socket Cap Screws. Multiple surface treatment options are available to satisfy anti-corrosion requirements under different working conditions. The product maintains stable mechanical performance under continuous static load, and becomes a common connecting component for heavy equipment assembly. We maintain stable raw material supply chain to support long-term cooperative importers worldwide.