DUB-2175 Nylon Insert Locknut 5mm (4) PDF Print $1.62 SKU: DUB-2175 DUB-2175 Nylon Insert Locknut 5mm (4) Notify Me Add to Wishlist Add to Compare Back to: Du-Bro Products Description These are 5mm Nylon Insert Lock Nuts from Dubro's Car Line (Metric). FEATURES: Zinc plated, metal construction.