Spring nuts, also recognized as U - nuts or captive nuts, are a kind of fastener. Here is a detailed introduction:
Spring nuts are designed to create a threaded connection in applications where it is hard or impossible to access the backside. They consist of a nut body with a pair of spring - loaded legs on either side. The legs have serrated edges or grooves, which enhance their grip on the panel or sheet metal.
When installing a spring nut, pressure is applied to its wings or tabs, causing them to flex inward so that the nut can be easily slid onto the bolt or screw. Once in position, the spring - loaded wings expand outward, firmly gripping the surface and preventing the nut from loosening over time.
Single coil spring nuts: They have a single coil spring as the gripping mechanism, offering excellent grip strength. They are often used in the automotive industry.
Dual coil spring nuts: These nuts have two coil springs, providing enhanced gripping strength. They are suitable for applications with higher vibration or dynamic loads, such as in the construction and industrial sectors.
No spring reverse nuts: Also known as blind nuts, they are designed for applications where the screw is inserted from the front side but hidden from view. They are commonly used in furniture manufacturing.
Plastic spring nuts: Made from durable plastic materials, they are ideal for applications requiring electrical insulation, commonly seen in the electronics industry.
Locking spring nuts: They have an additional locking feature to prevent loosening or rotating, used in critical applications where fastener failure is not allowed.
Strong grip strength: The serrated legs of spring nuts grip the material tightly, preventing loosening or detachment, ensuring the stability of the overall assembly.
Time and cost savings: They eliminate the need to access the backside of a panel or sheet metal for installation, saving time and effort and reducing labor costs.
Increased versatility: They can be used with a variety of materials, including metals, plastics, and composites, making them suitable for different industries.
Vibration resistance: The serrated legs create a locking effect, enabling them to withstand vibrations and dynamic loads without loosening.
Ease of installation: Spring nuts are easy to install. They can be positioned on the material, and as the screw is tightened, the spring - loaded legs engage and secure the nut in place.
Automotive industry: They are widely used in automotive manufacturing, such as in the assembly of vehicle interiors, engine components, and body panels.
Aerospace industry: In the aerospace sector, they are used in the assembly of aircraft interiors, avionic systems, and structural components due to their ability to withstand vibrations.
Electronics and electrical industries: They are used in electrical enclosures, control panels, and switchgear assemblies to provide electrical insulation.
Construction and HVAC industry: In the construction industry, they are used for electrical conduit systems, cable tray installations, and HVAC ductwork.
1,Standard: DIN,ASME,Open to customized
2,Thread: UNC,UNF
3,Material: Stainless Steel / Carbon Steel ,low carbon steel(mild steel), middle carbon steel, alloy steel, stainless steel (SS201, SS304, SS316),and brass, aluminium alloy.
4,SAE Class: 2,5.8 ASTM A194 2H. Metric from 4 to 10
5,Metric Size: M5 M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M33
Inch size: 1/4”,3/8”,1/2”,5/8”,3/4”,7/8”,1”,1-1/4”,1-1/2”,2”,2-1/4”
6,Surface finish: Plain finish,Black ,Black Oxide, Black Zinc Coating,Hot Dip Galvanized(HDG), Zinc Plated, Yellow ZP,Brass coating, Nickle plated , Chrome plating, Dacromat, Geomet, etc.
7,Packing: 20-25kg Carton+Pallet (bulk packing OR small box packing)
