Spin galvanizing for small parts, fasteners, and precision components
Spin galvanizing provides durable, cost-effective protection for small to medium-sized steel parts requiring coating uniformity, thread integrity, and reliable fit and function. By combining hot-dip galvanizing with centrifugal spinning technology, the process removes excess molten zinc to help maintain dimensional consistency across threaded fasteners and precision components.
AZZ's automated spin galvanizing operations support high-volume production while delivering consistent coating quality for construction, electrical, industrial, and transportation applications.
How spin galvanizing works
During processing, steel components are immersed in molten zinc, creating tightly bonded zinc-iron alloy layers. Centrifugal spinning then removes excess zinc to help maintain coating uniformity, thread fit, and dimensional accuracy while delivering the long service life associated with galvanized steel.
The process is commonly used for:
- All-thread rods
- Nut blanks
- Guardrail bolts
- Anchor bolts
- Washers
- Turnbuckles
- Wheels
- Fasteners and structural hardware
Uniform coating for precision components
Spin galvanizing provides uniform zinc coverage while helping maintain the fit and functionality of threaded fasteners and intricate components. The process helps prevent excessive zinc buildup that can interfere with assembly while protecting surfaces, edges, threads, and complex geometries.
Depending on component size and diameter, spin galvanized parts typically receive coating thicknesses ranging from approximately 1.7 to 3.4 mils (43 to 86 microns), providing substantially greater durability than many zinc-plated alternatives.
Quality standards and production capability
Supported by automated conveyor systems and integrated production lines, AZZ delivers efficient high-volume processing with tightly controlled quality procedures designed to support coating consistency and reliable thread fit.
Common standards include:
- ASTM A153
- ASTM F2329
- ISO 9001
- ISO 14001
- Customer-specific requirements
Sustainable corrosion protection for precision components
Spin galvanizing helps extend the service life of steel components while reducing maintenance requirements and material replacement over time. Utilizing naturally occurring zinc and fully recyclable steel, spin galvanized components support long-term durability while benefiting from the performance and sustainability advantages of zinc-based corrosion protection.
Need galvanizing for structural steel or large fabricated components? Explore Hot-Dip Galvanizing
