Fastener Production

Excellent Results Begin with Disciplined Processes

Each fastener produced in our factory is shaped by technical expertise, production experience, and disciplined processes. We manufacture a wide variety of standard and custom fasteners — including screws, bolts, and rivets — for applications across automotive, construction, and machinery industries.

All stages of design, forming, threading, heat treatment, and final inspection are carried out in-house, using state-of-the-art equipment. This ensures our fasteners deliver the mechanical strength, dimensional accuracy, and surface quality expected in high-performance applications.

Explore Our Production Process

Explore Our Plant

Material Input Quality Control

Our production begins with sourcing the best wire rods from both domestic and international suppliers. Before entering the production process, these rods undergo a series of quality checks. Once all inspections are completed and approved, the wire rods are relabeled and moved to the production line.

Raw Material Preparation

The surface of the wire rod is first cleaned and coated with chemical agents. Then, it is cold drawn to the required diameter for use in bolt and screw production. The drawn wire is then annealed in atmosphere-controlled furnaces to achieve spheroidization and make it suitable for cold forming.

Preparation for Cold Formi̇ng

After the annealing process is completed, the wire surfaces undergo a phosphate coating treatment. This process extends die life and prevents surface defects that may occur during cold forming. Once phosphating is finished, the semi-finished products are inspected through quality control and transferred to the pre-production stock area.

Cold Formi̇ng & Secondary Operations

Cold forming lies at the core of Dega’s production process. Using dies designed according to technical drawings and specifications, fasteners are formed in high-speed multi-station presses. If necessary, secondary operations such as heading, grooving, drilling, or knurling are performed after cold forming.

Heat Treatment & Zinc Coating

Fasteners that complete production are annealed in fully automated, atmosphere-controlled furnaces to enhance their mechanical properties. Then, for surface protection, a zinc coating is applied. Our coating facility operates in compliance with ASTM, ISO, and EN standards; coating thickness and hydrogen embrittlement are monitored according to these norms.

Final Quality Control & Packaging

Products that pass quality tests are packaged using automatic machines in quantities and weights tailored to customer requirements. Labeling and barcoding are carried out during the packaging process. After final inspection and approval, the products are prepared for shipment.