No, there are no hot-dip galvanized self-drilling screws. Hot-dip galvanizing involves heating the screw at high temperatures to adhere a zinc layer to its surface. This high temperature affects the hardness of the screw, so hot-dip galvanized self-drilling screws are not available.
Why do some customers look for hot-dip galvanized self-drilling screws?
This is because customers mistakenly believe that Dacromet coating is the same as hot-dip galvanizing. While Dacromet and hot-dip galvanizing look very similar, their manufacturing processes are completely different. The specific processes are complex and will not be detailed here. In terms of corrosion resistance, Dacromet is far superior to hot-dip galvanizing. Wotu self-drilling screws’ Dacromet coating has passed salt spray testing and enjoys a good reputation in the industry!
Self-drilling screw manufacturer – Hebei Wotu Fastener Manufacturing Co., Ltd.!
DIN 931-style half-thread and DIN 933-style full-thread hex bolts should not be selected from diameter and overall length alone. The practical choice depends on the joint stack, required grip, location of the thread transition, available nut engagement, mating hardware, material or property requirement, coating system and governing product specification. A half-thread bolt is not automatically […]
A bolt manufacturer should be evaluated against a defined joint, drawing and acceptance plan—not a product list or unit price alone. Buyers need to verify whether the supplier can manufacture the required geometry, control material and heat-treatment requirements where applicable, manage threads and coatings as one dimensional system, inspect critical characteristics, preserve batch traceability and […]
