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square nut 1.standard:DIN(din557,din562), BS, ANSI/ASME, ISO, GB, nonstandard ,special nut 2.size:M3-M64, 1/8''-3'' 3.finish: zp(bluish, white, yellow), plain 4.class:4.8,6.0,8.8,12.9 grade:2,5,8 5.finish: zp(bluish, white, yellow), plain, black, HDG 6.material: mild carbon steel (SAE1008, LY, ML08, Q235,Q195) Middle carbon steel(10B21,35#, 45#) 7.processes: cold forging and hot forged 8.packing: gunny bag or carton/ pallet 9.way of payment: T/T, L/C 10.certificate: ISO9001:2000 Established in 1990, Handan strong Fasteners Manufacturing Co., Ltd. is located in the largest home of fasteners in China—Yongnian County. It is 400 kilometers south from Beijing and 2000 kilometers north from Guang Zhou. Our factory is a large enterprise specializing in the manufacture ,R&D and marketing bolts, nuts, washers, threaded rods and electric power fittings etc. We own proudction advantage in non-standard, special, and longer&thicker fasteners according to client’s drawings and samples. Tel:0086 310 6825021 Fax:0086 310 6826021 Mobile:0086 13931065293