Extruded U-nuts CChiai 10PCS Extruded Spring U-Nuts 1/4 Inch Carbon Steel Leaf Spring Nuts Reed Nuts Metal Car Body Panel Fasteners Package Quantity:10x Extruded U-Nuts, fully meet your needs for automotive installation projects in quantities sufficient to get the job done. M6 Carbon Steel M8 304 Stainless Steel Spring Nuts - Zinc Spring Nuts and Spring Nuts Supplier Customer Service: make your satisfaction is our biggest wish, if you have any questions or dissatisfaction with the product please contact us, we will answer or deal with your questions as soon as possible. Please choose your size and quantity from the drop down menu above. These are steel spring u-nut body clips. They are commonly used for mounting fenders and rubber panels, but can be found in many places throughout your vehicle. Thread sizes available are: #8-32, #10-24, 1/4-20, 5/16-18, 3/8-16 The first number is the diameter, the second number listed is the Tpi, or threads per inch. 5/16... Specification Material: carbon steel Colour: black Thread size: 1/4-20 inch Length of U-shaped panel: 23mm Width: 12mm Method of use Pre-drill holes in 2 sheet metal parts, insert the U-clamp into one of the sheet metal parts, screw through the holes and finally fix into the U-clamp to complete the assembly. jojofuny 20pcs Extruded U Type Nuts Bumper U Style Clip on Nut Extruded U Style Thank you for your support.