Length (L, L1):- 30 mm Diameter 1:- 26,0 mm Diameter 2:- 23,7 mm Width Across Flat:- 19 mm Depth of Head (a1, t):- 12,5 mm Drive Connector Square (Female):- 3/8 inch Packing Unit:- 10 Piece Weight:- 0.064 kg Drive Connector Square (Female) Nominal Size:- 10 mm