Black Oxide finish on our mild steel collars is formulated as part of the total performance of the collar. The black oxide affects the anti-stick-slip characteristics and helps keep the torque rating of the screw within its design parameters. Black oxide also has corrosion resistant properties for indoor environmental applications. However, black oxide is not intended as an outside weather protective finish. Other advantages to black oxide collars include dimensional uniformity with negligible thickness and no flaking or chipping.
Zinc plating is generally accepted as the industry standard for set-screw collars. Zinc plating provides corrosion resistance in indoor environmental applications and has a “shiny silver” appearance for product appeal. Special zinc-plating, often associated with different colorings, such as yellow-zinc dichromate or black zinc plating, can be applied to greatly increase corrosion resistance.
Climax offers other special finishes including anodizing for aluminum collars and special zinc-plating with greater corrosion resistance. Contact customer service at 800-542-6552 for complete information on Climax’s special finishes.