import bpy
op = bpy.context.active_operator

op.bf_Model_Type = 'bf_Model_Bolt'
op.bf_Head_Type = 'bf_Head_Hex'
op.bf_Bit_Type = 'bf_Bit_None'
op.bf_Nut_Type = 'bf_Nut_Hex'
op.bf_Shank_Length = 0.0
op.bf_Shank_Dia = 6.0
op.bf_Phillips_Bit_Depth = 2.4496147632598877
op.bf_Allen_Bit_Depth = 3.0
op.bf_Allen_Bit_Flat_Distance = 5.0
op.bf_Hex_Head_Height = 4.0
op.bf_Hex_Head_Flat_Distance = 10.0
op.bf_CounterSink_Head_Dia = 12.600000381469727
op.bf_Cap_Head_Height = 6.0
op.bf_Cap_Head_Dia = 10.0
op.bf_Dome_Head_Dia = 12.0
op.bf_Pan_Head_Dia = 12.0
op.bf_Philips_Bit_Dia = 3.9000000953674316
op.bf_Thread_Length = 12.0
op.bf_Major_Dia = 6.0
op.bf_Pitch = 0.75
op.bf_Minor_Dia = 5.188100814819336
op.bf_Crest_Percent = 10
op.bf_Root_Percent = 10
op.bf_Hex_Nut_Height = 5.0
op.bf_Hex_Nut_Flat_Distance = 10.0