Best Steel Flange Nuts in 2026

☛【304 Stainless Flange Nuts Assortment Kit】: The nuts are made of high-quality 304 stainless steel, corrosion and rust resistant, suitable for humid environment.

☛ 【Hardware Nuts Package】：The Package Contains 7 Sizes, Included: M3 M4 M5 M6 M8 M10 M12

☛【Widely Application】: There is a wide flange at one end of the flange nut, which increases the bearing surface of the nut and is not easy to loosen. It can be used to replace the hex nut and shock-proof washer. It is widely used in automobiles, motorcycles, generators, home appliances and other projects.

Exhaust manifold Stud Bolt Nut Gaskets Kit is designed compatible with Honda Acura B, C, D, F, H series engines. also works for the intake manifold; You can also remove the gasket (exhaust manifold stud designed compatible with Ford 4.6 & 5.4 Liter V8 Engine)

Standard 304 stainless steel studs and serrated flange nuts kit is great replacement for your orginial stud and bolt that are rusted and broken

Exhaust manifold stud nuts kit thread size, M8*1.25MM, also fit other vehicle, such as Chevrolet, GMC, Dodge and so on. Please Check and measure the lengths(50mm) and thread sizes(M8*1.25MM) needed for your specific vehicle application

Flange Nuts are fasteners that look like a standard hex nut but the bottom has a widened circular flange or skirt that acts as a built-in washer and distributes the holding power of the nut evenly across the surface for a more secure fastening solution. These types of nuts are designed to remove the deficiencies commonly associated with the use of washers.

The serrations on the nut are meant to dig into the surface of the work to create a more secure connection that resists loosening which also makes it a popular choice with electronics fasteners as they are less prone to damaging fragile, soft metal surfaces as compared to a traditional nut.

M8 - M12 Diameter JIS (Japanese Industrial Standard) Flange nuts have smaller hex sizes than ISO and ANSI type bolts and are commonly used for import cars, auto repair, truck, car, and motorcycle frames, vehicle engines, transmission and exhaust. They are also mostly used for automotive and fastening applications such as steering and suspension parts, cylinder, and flywheels, and also for high strength mechanical applications and forged parts.

Flange Nuts are fasteners that look like a standard hex nut but the bottom has a widened circular flange or skirt that acts as a built-in washer and distributes the holding power of the nut evenly across the surface for a more secure fastening solution. These types of nuts are designed to remove the deficiencies commonly associated with the use of washers.

The serrations on the nut are meant to dig into the surface of the work to create a more secure connection that resists loosening which also makes it a popular choice with electronics fasteners as they are less prone to damaging fragile, soft metal surfaces as compared to a traditional nut.

M8 - M12 Diameter JIS (Japanese Industrial Standard) Flange nuts have smaller hex sizes than ISO and ANSI type bolts and are commonly used for import cars, auto repair, truck, car, and motorcycle frames, vehicle engines, transmission and exhaust. They are also mostly used for automotive and fastening applications such as steering and suspension parts, cylinder, and flywheels, and also for high strength mechanical applications and forged parts.

Nut Type: Hex serrated flange nut(Fine thread); Thread diameter: M10 / 0.39"; Pitch: 1.25mm; Hex width: 15 mm / 0.59"; Measuring system: metric.

Self-locking serrated flange digs into the material being fastened to help prevent loosening.

Made of high quality stainless steel 304, provides good strength and corrosion resistance in bad environments.

Nut Type: Hex serrated flange nut(Fine Pitch); Thread diameter: M12 / 0.47"; Pitch: 1.25mm; Hex width: 15 mm / 0.59"; Measuring system: metric.

Self-locking serrated flange digs into the material being fastened to help prevent loosening.

Made of high quality stainless steel 304, provides good strength and corrosion resistance in bad environments.

[PREMIUM MATERIAL] Our TICONN rivet nut kit is made from premium quality zinc plated carbon steel. Guaranteed worry-free rust-free user experience.

[COMPATIBILITY] The rivet nuts are compatible with most rivet nut tools on the market. Knurled under the flange design made them easier to be applied and stay in place without moving

[SIZE INCLUDED] This rivnut tool kit includes SAE UNC 1/4"-20 rivet nuts 70pcs

[DIMENSIONS] Type: serrated flange nuts; Standard: ANSIB18.2.2; Material: 18-8 (A2, 304) Stainless Steel; Dimensions: #8-32; Quantity: 50 pcs.

[MATERIAL] 100% Made of high quality 304 stainless steel (also known as 18-8 or A2 stainless steel), they have good corrosion resistance, rust resistance and high hardness, which provides a longer service life, can be used indoor and outdoor, even in humid environment.

[FEATURE] Flange works like a washer to distribute the load. Serrations can help grip the material surface and prevent the nuts from loosening due to vibration.