Brand: Allstar Performance Manufacturer's Part Number: ALL16030-10 Part Type: Nuts Product Line: Allstar Performance Mechanical Locking Hex Nuts Automotive Fittings Part Number: AAF-ALL16030-10 UPC: 848238005127 Thread Size: 1/4 in.-20 Nut Style: Hex Nylon Insert: No Self-Locking: Yes Nut Material: Steel Nut Finish: Zinc Washers Included: No Quantity: Sold as a set of 10. Notes: Coarse thread. Description: Keep bolts tight with these Allstar Performance mechanical locking hex nuts. They are specially designed locking nuts that will make sure that your bolts stay tightened. Whether you're working around the shop or on the race car, Allstar Performance mechanical locking hex nuts will help you get the job done.