ThePipingMart Blog Fasteners What is Flange Serrated Nuts? Properties, Dimensions and Uses

What is Flange Serrated Nuts? Properties, Dimensions and Uses

Flange Serrated Nut

Flange serrated nuts, also known as flange locknuts, are among the most commonly used fasteners in the industry. They are widely popular due to their ability to securely and quickly attach two components. Read on to learn more about flange serrated nuts and why they’re so useful.

What is Flange Serrated Nuts?

Flange serrated nuts are a type of nut that features a built-in flange or collar for added stability and strength when attaching two components. The collar is designed to provide extra surface area for bolts, screws, or other fasteners—allowing them to be tightened down more securely. This makes them ideal for applications where vibration or movement may occur, making them especially popular in industrial settings.

How Do Flange Serrated Nuts Work?

The unique design of flange serrated nuts helps increase the contact surface area between the nut and bolt—providing a stronger grip than standard nuts. Additionally, the locknut’s shape helps keep it from backing off due to vibrations or movement and provides additional support against turning forces exerted by other components attached to the same bolt.

Benefits of Using Flange Serrated Nuts

Flange serrated nuts provide numerous benefits compared to traditional hex and square nuts. For one thing, they require minimal torque when installed because the collar helps keep them locked into place without using too much force. This reduces wear on the nut and fastener threads and makes installation easier overall. Additionally, flanged locknuts are far more secure than washers or locking compounds alone—ensuring that components remain tightly connected even with frequent vibration or movement.

Flange Serrated Nuts Properties

  • Flange serrated nuts connect two pieces of metal.
  • The serrated portion of the nut helps to grip the metal and prevent it from slipping.
  • Flange serrated nuts are available in various sizes and finishes.
  • They are made from various materials, including steel, brass, and aluminium.
  • Flange serrated nuts are easy to install and remove.

Flange Serrated Nuts Uses

Flange serrated nuts are essential fasteners used in various industries and applications. Their key design feature is the external flange which acts as a built-in washer, providing even pressure on the surface to which it’s attached. Many engineers prefer them for their superior strength, ensuring that connections remain secure under high vibration, extreme weather, and other challenging conditions. Flange nuts are often used in larger equipment to provide structural integrity, such as those utilized in automotive, aerospace, and medical device manufacturing. Additionally, these nuts can be useful for making low-cost temporary repairs or in other scenarios where corrosion resistance isn’t a major concern. Flange serrated nuts play an important role in many industrial settings.

Flange Serrated Nuts Dimensions

Flange Serrated Nuts Dimensions

THREAD SIZE D M5 M6 M8 M10 M12 M14 M16 M20
M8x1 M10x1,25 M12x1,5 M14x1,5 M16x1,5 M20x1,5
(M10x1) (M12x1,5)
P 0,8 1 1,25 1,5 1,75 2 2 2,5
c min. 1 1,1 1,2 1,5 1,8 2,1 2,4 3
a min. 5 6 8 10 12 14 16 20
max. 5,75 6,75 8,75 10,8 13 15,1 17,3 21,6
dc max. 11,8 14,2 17,9 21,8 26 29,9 34,5 42,8
dw min. 9,8 12,2 15,8 19,6 23,8 27,6 31,9 39,9
e min. 8,79 11,05 14,38 16,64 20,03 23,36 26,75 32,95
m max. 5 6 8 10 12 14 16 20
min. 4,7 5,7 7,6 9,6 11,6 13,3 15,3 18,9
min. 2,2 3,1 4,5 5,5 6,7 7,8 9 11,1
s nominal=max. 8 10 13 15 18 21 24 30
min. 7,78 9,78 12,73 14,73 17,73 20,67 23,67 29,67
r max. 0,3 0,36 0,48 0,6 0,72 0,88 0,96 1,2


In summary, flanged, serrated nuts offer superior security and stability compared to traditional hex and square nuts when attaching two components—especially in situations where frequent vibration or movement could cause standard fasteners to loosen over time. Their unique design allows them to be easily secured with minimal torque applied during installation while still providing reliable connection strength when securing various components together. If you’re looking for a fastening solution that can stand up against vibrations and movement while still providing robust connection strength, consider opting for flanged, serrated nuts instead of a standard hex or square models!

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