MOTM

thanks for the link to Aaron's Machine Screws, great website!

which of these describe the correct MOTM KEPS nuts:

1. #6-32 x Machine Screw Nuts, Hex, , 18-8 Stainless Steel, Plain, External 
Tooth "K" Lock Nut
  2. #6-32 x 1/4 Machine Screw Nuts, Hex, , Steel, Zinc, External Tooth "K" 
Lock Nut
  3. #6-32 x Machine Screw Nuts, Hex, , Steel, Zinc, External Tooth "K" 
Lock Nut

and

what is the correct length of the black phillips panel screws? someone 
posted 1/4" but mine seem closer to 3/8"

#8-32 x 3/8 Machine Screws, Phillips, Pan, Steel, Black, Full Thread  ??

sunny regards
mark