A cup square bolt is a type of bolt that has a square head with a recessed centre. This recessed centre, often referred to as a "cup," allows for a more flush or even appearance when the bolt is installed. Cup square bolts are commonly used in applications where a clean, finished look is desired, such as in furniture, machinery, and automotive components. NSS is excited to be providing our industry leading quality products in convenient retail packaging. Products are available in Small and Medium Pouches, as well as Jars, and Buckets.