Length (L, L1):- 28 mm Diameter 1:- 17,2 mm Diameter 2:- 18,3 mm Width Across Flat:- 12 mm Depth of Head (a1, t):- 9,0 mm Drive Connector Square (Female):- 3/8 inch Packing Unit:- 5 Piece Weight:- 0.032 kg Drive Connector Square (Female) Nominal Size:- 10 mm