These are 5mm Nylon Locknuts by Traxxas.
FEATURES:
- Chromed steel construction.
- Nylon inserts.
INCLUDES: Eight 5mm locknuts.
SPECIFICATIONS: Thickness: 4.95mm (.195")
Used with permission, copyright 2017 Traxxas/Tower Hobbies, Inc. Copyright 2017 Brey Corp. t/a Hobby Works.