Nylon washer used with 3/4" head diameter drive rivet for road or traffic sign installation. You can buy the rivets used with these parts here (P/N DRAU126AB).
Dimensions:
- 3/4" / 0.75" outer diameter (OD)
- 3/8" / 0.375" inner diameter (ID)
- 1/16" / 0.0625" thick (THCK)
Part Number: NW12-6.