4-40 CAPTIVE SELF-CLINCHING NUTS STAINLESS STEEL - 25 pcsGreat Price on Hard-To-Find Small Pattern Nuts! You are purchasing a lot of 25 Captive Self-Clinching Nuts. They are manufactured by UNICORP and the part number is EF-440-1. They are designed to be used in panels ranging from .060 - .090" thick. These fasteners are new excess distributor inventory. Thread size: 4-40 Thickness: .060" Hex Size: 3/16" Material: Stainless Steel Finish: None will be by buyers choice of First Class or Priority Mail. For the safest and fastest service we only accept secure payments by 's PayPal system. Also, please note that most of the time I am not available on weekends and will answer your emails during weekdays. Thanks for looking. Be sure to add us to your favorites list!Please check out our other items!