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About product and suppliers:
        Alibaba.com offers 7,076 butterfly screws products. About 21% of these are screws. 

A wide variety of butterfly screws options are available to you, such as free samples, paid samples. 

There are 7,076 butterfly screws suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of butterfly screws respectively. 

Butterfly screws products are most popular in North America, Mid East, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 2,192 with ISO9001, 989 with Other, and 591 with ISO14001 certification.