Flange Lock Nuts

Flange nuts are a type of hex nut that features a wide base at one end (the flange) which acts as an integrated washer, eliminating the need for one. 

Frequently Asked Questions About Flange Nuts

What are flange nuts used for? 

Flange nuts are commonly used in automotive and industrial applications, as well as several different types of appliances and electronics. They are ideal for projects where assembly speed is a priority, as well as a wide load distribution and vibration resistance. 

What are the different types of flange nuts?

AFT offers the following different types of flange nuts: flange locknuts, standard flange nuts, nylon insert flange lock nuts, and top lock flange nuts.

What is the difference between serrated and non-serrated flange nuts?

A non-serrated flange nut provides a wide surface for load distribution, whereas a serrated flange nut provides this in addition to resistance against vibration. 

What sizes do flange nuts come in?

AFT offers flange nuts in both SAE and metric measurements. Diameter-thread sizes range from #6-32 to 3/4”-16 or M3-0.5 to M20-2.50. 

What materials and finishes do flange nuts come in? 

Flange nuts come in either steel or stainless steel, as well as in a wide variety of finishes: black, black phosphate and oil, phosphate and oil, plain, trivalent RoHS, zinc, zinc Cr+3, zinc yellow, and zinc yellow Cr+3. A flange nut made of stainless steel or with a zinc finish provides extra corrosion resistance.