Wuxi Zhongrui Precision Metal Working Co. Ltd is based in China and lists tapping screws, self-drilling screws and flat washers on Global Trade Plaza. The tapping screws are Phillips and slotted combination drive pan head self-tapping screws with a galvanized finish, offered in sizes such as 10 x 1/2", 10 x 5/8", 10 x 3/4", 10 x 1", 10 x 1 1/4" and 10 x 1-1/2", with additional sizes and custom packaging available. The self-drilling screws are galvanized steel and available in lengths of 3/4", 1", 1-1/4" and 1-1/2", priced per 1,000 pieces in bulk, and the supplier states it can produce any size. Flat washers are galvanized and offered in 1/8", 5/32", 3/16" and 1/4" sizes, also priced per 1,000 pieces in bulk. Buyers can send an enquiry through Global Trade Plaza.