Special socket head screws as per drawing in attachment Material: steel 10.9 (or alternative), zinc plated or plain Depth in the body: 5mm 1) M8x12 - 1000 and 5000 pcs. 2) M8x16 - 1000 and 5000 pcs. 3) M8x20 - 1000 and 5000 pcs.