Cat fuel injector nozzles utilize specialized product metallurgy, proprietary manufacturing processes and design, to deliver injectors capable of meeting today's performance and injection pressures for emissions requirements. Mount Type: Sandwich - Threaded Stud Both Ends Overall Length (mm): 63.5 Overall Length (in): 2.5 Outside Diameter (mm): 50.8 Outside Diameter (in): 2 Rubber Length (mm): 19.1 Rubber Length (in): 0.75 Stud Length (mm): 22.2 Stud Length (in): 0.87 Stud Thread Size: 5/16" Stud Thread Pitch: 18