1/2 UNF NYLOC NUT ZP GR8

The Nyloc nut is an economic locking nut and ideal in applications where vibration or motion could loosen or undo the nut. It uses a nylon insert located towards the top of the nut, reducing its inner diameter, which then deforms over the mating thread.
Thread = 20 TPI

GST Incl
Excl
1/2 UNF NYLOC NUT ZP GR8
N8NYLF012Z
Each
$0.2803