Anti tamper bolts, nuts and washers Material: stainless steel 316 1) M4 x 20mm bolts 500 pcs. 2) M4 nut 500 pcs. 3) M4 washer 500 pcs. 4) M6 x 30mm bolts 500 pcs. 5) M6 nut 500 pcs. 6) M6 washer 500 pcs. 7) M8 x 40mm bolts 750 pcs. 8) M8 nut 750 pcs. 9) M8 washer 750 pcs. 10) M10 x 60mm bolts 750 pcs. 11) M10 nut 750 pcs. 12) M10 washer 750 pcs.