1) High-precision,professional manufacturing 2) ACME,DIN, JIS,BSW, GB 3) ISO9001:2008, OEM service 4) low price/high quality Standard ACME,JIS ... Professional manufacturing, high-precision, smooth and clean without burr MOQ 1000 pcs, we also can accept small quantity order Packing Single packed , 50 ... screw in different sizes according to your drawings and samples high-precision lead screw