... JIS 3) Materials: stainless steel, GI, copperized,Low-carbon and mid-carbon steel We can supply fasteners according to DIN ... roofing bolts, flat washes, spring washes, machine screws, and self tapping screws. Owing to high quality, punctual delivery ... and better service, our products are selling well in Hong Kong, Macao, Singapore, Malaysia, Southeast Asia, Japan, Europe, and America. ...