Titan SC6 513 Spray Tip 661-513 or 661513 Titan SC6 513 Spray Tip 661-513 or 661513. The SC6 511 3 661-513 is equal in performance to the SC6 513 662-513. Solvent Proof Seal, Hand tight design. Highest quality tungsten carbide assures longest life and durability. Flow indicator, One seal for all coatings.