This AC Delco Chevy small bow tie Air Cleaner Wing Nut is the perfect addition to your car's air filter housing. Made to fit 1/4-20 or 5/16-18 stud, this wing nut is easy to install and provides a secure grip to ensure that your air cleaner stays in place. The brand, Chevrolet , is known for its quality and reliability, making this wing nut a great choice for any car enthusiast.