4 x m4 x 12 screws cap. 16. 17mm entire length 12mm thread. 4mm diameter thread for use with m4 nuts. 6. 88mm outer diameter head. 4 x m4 nuts. 6. 65mm across the hex. 4. 58mm wide. 4 x m3 x 12 screws cap. 15. 28mm entire length 12mm thread. 3mm diameter thread for use with m3 nuts. 5. 45mm outer diameter head. 4 x m3 nuts. 5. 36mm across the hex. 3. 84mm wide