... ,428H,520,530,630,25,25H3)short pitch conveyor roller chain attachments:A-1,A-2.K-1, ... K-2,SA-1,SA-2,SK-A,SK-24)double pitch ... transmissions v& conveyor chains :2040,2042,2050,2052,2060,2062,2060H,2062H,2080,2082,2080H5)agricutual chain: ... with attachment series, 6)simplex,double,triplex chainsThe chain technic is as bellow1)shot peening2)bluing3)phosphating4)nickel- ...