Keystone Bolt 4-40KEP-100 Kep Nuts w/Lock Washers, 4-40 - (pkg 100) These are machine screw hex nuts with pre-assembled external tooth lock washers. The tooth lock washer, which turns freely, bites into the surface it contacts to resist loosening.
Keystone Bolt 4-40KEP-100 Kep Nuts w/Lock Washers, 4-40 - (pkg 100) These are machine screw hex nuts with pre-assembled external tooth lock washers. The tooth lock washer, which turns freely, bites into the surface it contacts to resist loosening.