A sample from the products for the Exhaust include: Washer, Plate(3mb), Washer, Plate(6e3), Washer Plate 214147660000, Ybs66-8 Washer, Plain.
In this schematic the "Screw, Bind" is used most often.
The most reasonably priced component used on the Gt1 1973 1974 Usa Exhaust is the Bolt (682).