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U-Nuts (8)

Hillman M8-1.25 Coarse Thread Regular Metric Extruded U-Nuts, 5-Pack

Hillman M8-1.25 Coarse Thread Regular Metric Extruded U-Nuts, 5-Pack

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Frequently Asked Questions About U-Nuts

Speed nuts also use a clip-on edge design similar to U-nuts, but instead of a separate threaded extrusion, they secure the screw with the spring tension of the clip itself. This makes speed nuts quicker to install and remove. However, extruded U-nuts provide greater thread engagement and can handle higher loads. The best choice depends on the holding strength your application needs.
They can if the clip is undamaged, but spring steel loses tension with repeated removal cycles. It’s best to replace the U-nut on critical joints or any panel that must stay tight under load.

U-Nuts

Connecting sheet metal panels without welding or drilling extra holes is easy with the right clip-on fasteners, and U-nuts are designed specifically for this task. At Tractor Supply, we carry U-nuts in a variety of styles and thread sizes within our wide selection of fasteners.

Clip-On Precision for Sheet Metal Work

U-nuts attach to the edge of a sheet metal panel and hold a threaded screw in place without welding, nut plates or special tooling. The design is standard in automotive assembly, appliance manufacturing and industrial enclosure work. Both legs of a U-nut are the same length, keeping the clip evenly fitted and maintaining alignment as you fasten.

The threads-per-inch (TPI) measurement tells you how coarse or fine a thread is. Most standard U-nuts fall in the 16 to 20 TPI range. Lower TPI threads are faster and better tolerate rough or dirty conditions. Higher TPI grips tighter and holds better in thin material where thread engagement is limited.

Types of U-Nuts and Their Uses

Regular extruded U-nuts use a spring clip with a threaded extrusion that holds firmly on the panel edge and secures position through assembly. Coarse-thread U-nuts match standard sizing and handle most automotive and industrial sheet-metal work. Long extruded U-nuts provide greater thread engagement for the higher-load applications Life Out Here sees, and double as a lock washer to help resist vibration once fastened.

Steel Bodies for Rugged Jobs

Steel’s spring properties give U-nuts their secure grip, letting the clip flex during installation and press tightly against both sides of the panel edge. Steel resists the stress of repeated assembly and constant vibration common in sheet metal joints. Its strength helps U-nuts maintain their shape as screws are tightened, ensuring a secure threaded hold every time. Unlike other nuts that require a wrench or separate nut plate, steel U-nuts stay in place on the panel so you can use both hands for driving screws.

Pick Up U-Nuts from Tractor Supply

To choose the right U-nut, compare edge distance, hole diameter and panel gauge on your project to the clip’s rated specifications. These factors ensure the fastener fits securely and performs well under load. Explore our full selection of U-nuts and other hardware online or visit your local Tractor Supply store.