... 12000 tons one year with 150sets of heading and rolling machine, 3 belt of heattreat ments furnace ... this new year of 2013! SELFTAPPING SCREW CROSS AND SLOT COMPSITE RECESS PAN HEAD DIN 7981HEAD TYPE ... TYPE: PHILIPS, SLOT, STAR, SQUARE MODEL TYPE: PHILIPS AND SLOTSURFACE : ZINC PLATING, NICKLE PLATING, BRONZ PLATING, BRASS ... MOST POPULAR SIZES: 3.5*9.53.5*113.5*133.5*163.5*193.5*223.5*253.5*32 3.9*133.9 ...