As seen on
Sign Up to Get
10% Off Your Next Order!
+ 500 FREQUENT BUYER POINTS
Be among the first to receive Weekly Specials & OPGI News.
10% off restoration parts only. 500 Frequent Buyer Points added after promotional order ships. See welcome email for full details.
Sign up for texts from OPGI, and get all our best offers and more!
By subscribing to OPGI text messaging at 80205, you agree to receive recurring autodialed marketing text msgs (e.g. cart reminders) to the mobile number used at opt-in. Consent is not a condition of purchase. Msg frequency may vary. Msg & data rates may apply. Reply HELP for help and STOP to cancel. See Terms and Conditions & Privacy Policy.
Washers and nuts help secure many components throughout your 1981 K35/K3500 by providing reliable threaded connections and proper load distribution. When used together with bolts or studs, these fasteners help keep parts firmly mounted while protecting surfaces from damage during tightening. OPGI offers sixteen Washers & Nuts designed to fit your vehicle correctly. From flat washers and lock washers to hex nuts and related fastening hardware, you’ll find quality parts from trusted brands including Eddie Motorsports, RESTOPARTS and CPP to help support repairs, maintenance, and restoration projects. Every purchase is backed by our Price Match Guarantee. Plus, with OPGI’s 60-day return policy, you can shop confidently when selecting parts for your 1981 K35/K3500. Orders ship quickly, or you can visit our Southern California showroom to see select components in person.
Find parts that fit your vehicle