12 14 x 3 4 July 8, 2019 16 32 64 128 Pb 12 14 x 3 4 Parafuso 12 14 x 3 4 Parafuso pb12 - 14 x 3/4 p3 Tornillo autoperforante 12 14 x 3 4 Parafuso auto brocante 12 x 14 x 3 4 14 1 2 x 12 3 4 12 3 3x 4 ) x 14 14 12 − 4x )= 3 − x Parafuso pb12 - 14 x 3/4 14 3x 12 2 x x 4 3 8 2x