1/4 UNF Stainless Nyloc Nuts x20  Ref: NB3242
Nut Size --- Spanner Size

#6 1/4AF
#8 1/4AF
#10 5/16AF
#12 5/16AF
1/4 7/16 or 3/8 AF
5/16 1/2AF
3/8 9/16AF
7/16 5/8AF
1/2 3/4AF
9/16 13/16AF
5/8 15/16AF
3/4 1" 1/8AF
7/8 1" 5/16AF
1 1" 1/2AF