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About product and suppliers:
            2,287 screw head sizes products are offered for sale by suppliers on Alibaba.com, of which screws accounts for 64%, drywall screws accounts for 1%, and self-drilling screws accounts for 1%. 

A wide variety of screw head sizes options are available to you, such as gb. 

There are 2,287 suppliers who sells screw head sizes on Alibaba.com, mainly located in Asia. The top countries of suppliers are India, China, and Taiwan, China, from which the percentage of screw head sizes supply is 1%, 97%, and 1% respectively.