Flange Nuts

Custom Nuts Manufacturer


Flange Nuts


Heatfastener specializes in the production of flange nuts,high-precision metal parts, fastener series(rivets, screws, nuts), auto spare parts, automatic lathe parts, CNC machining parts, metal stamping parts, etc. With over 10000 square meters of production workshops and 300 more employees divided into nine departments, We have passed ISO9001; ISO/TS16949; ISO14001; ISO13485 system approval&RoHS compliant. All the production processes are according to the rule of RoHS with a production capacity of 600,000,000 pcs per month. Our complete quality control program protects our customers by assuring them of 100% test and inspection prior to shipment. It is our promise that the purchased products are reliable, durable, and maintainable. Rely on our strong engineering team, perfect technique, excellent quality, reasonable price, timely delivery, customers from worldwide are always welcome to contact us

Our products are mainly used in the automotive industry, high-speed railway industry, aviation industry, medical equipment industry, etc, we have designed and manufactured key components for world-famous enterprises, we are committed to providing our customers with high-quality products, high-level services, and continuous improvement

Heatfastener offers fully customized custom bolts and screws according to your needs. We can bring your fastener design to reality, and everything according to your requirements.


flange nuts

Flange Nuts Details

flange nut is a nut that has a wide flange at one end that acts as an integrated washer. This serves to distribute the pressure of the nut over the part being secured, reducing the chance of damage to the part and making it less likely to loosen as a result of an uneven fastening surface. These nuts are mostly hexagonal in shape and are made up of hardened steel and often coated with zinc.
Flange nuts (and bolts) are widely used in automobiles and electronic products.

Hex Flange Nuts are hex nuts with a wide flanged portion near one end that acts as an integrated non-spinning washer. Flange nuts are used to spread the load placed on the nut over a wider surface area to prevent damage to the installation material. They can come in serrated flange nuts or non-serrated styles.

Flange nuts come in a variety of diameters and lengths. We carry them in coarse and fine thread. Listed below are the diameters we carry:


  • Stainless steel – SS302, SS304, SS316, (good tenacity),Stainless steel A2 A4
  • Steel – C45(K1045), C46(K1046),C20
  • Brass – C36000 ( C26800), C37700 ( HPb59), C38500( HPb58),C27200CuZn37), C28000(CuZn40)
  • Bronze–C51000, C52100, C54400, etc
  • Aluminum – Al6061, Al6063 etc
  • Carbon steel – C1006,C1010,C1018,C1022,C1035K,C1045
  • Alloy steel – SCM435,C10B21,C10B339
  • Other material– Titanium, UNS C11000 Copper,silicon


  • Grade: Grade 4.8,Grade 6.8,Grade 8.8,Grade10.9,Grade12.9 etc
  • Standard:GB,DIN,ISO, ANSI/ASTM,BS,BSW,JIS, Metric, Inch
  • Finish:Plain, H.D.G, Black oxide, Chrome, Teflon,dacromet,Anodized,With nylok
  • Certificates: ISO9001:2015, ISO14001:2015,IATF16949, ROHS
  • Non standards:OEM is available,according to customer requirments

Head type&Drive Type

  • Head Type:Flat, Oval, Binding, Pan, Round, Truss, Button, PF,Cheese,Fillister, Pan Washer, Cylinder,Hexagon, Indented Hexagon,Washer
  • Drive Type:Phillips, Slotted, Phiilips/Slotted, 6 Lobe, Pin 6 Lobe, Pozidrive, Square, Triangle,Y type. Tri-wing, S-type, H type, Hexagon, 5 Point,8 point, Spline, Spanner, Clutch, Hex pn,torx pin
  • Thread Type:Machine screws,bolts, self tapping etc


Flange nuts are often used in fastening applications involving oversized holes. They have a protruding rim that covers more surface area. Even if the hole is too big for a traditional nut, it may support the use of a flanged nut.

Also, our custom fastener, bolts, screws are widely used in the below industries

  • Electronics
  • Petrochemicals
  • Consumer products
  • Transportation
  • Agriculture
  • Heavy machinery
  • Construction
  • Automotive
  • Medical
  • Military
  • Aerospace
  • Oil and gas

flange nuts application

Flange nuts can have many types. Heatfastener as a leading custom flange nuts supplier and manufacturer, any need please just contact us

  • Hex flange nuts
  • serrated flange nuts
  • flange lug nuts
  • Exhaust flange nut
  • Flange wheel nuts,
  • Nylon lock hex flange nuts
  • Titanium flange nuts
  •  flange lock nuts

Heatfastener carries all kinds of flange nuts and bolts, from Micro M1 to Large nuts. and specially custom flange nuts

flange nuts

Need Custom Flange Nuts for Your Industry?

As a 20-year industry experience manufacturer with a factory equipped with precision machines, we can provide, from consultation to production, a one-stop solution for you.

About Us

Shenzhen Heat Hardware Co., Ltd is a leading custom screw manufacturer in China founded in 2000 years. We are specializing in custom screws, security screws, Sems screws, Chicago Screws, Weld Screws, Long screws, Micro Screws, Thumb Screws, Set Screws, Custom bolts, carriage bolts, nuts, and other custom Fasteners. With more than 20years of industry experience. We have serviced over 20000customers including the aerospace industry, automotive industry, electronics, mechanical and electrical products, robots, the Medical industry, communications industry, Outdoor sports products, smart appliances, etc. we can provide one-stop fastener customized service for you no matter what kind of custom fastener you need.

Frequently Asked Questions

 The integrated washer of a flange nut works in the same way as a standard washer, providing a greater area to distribute the nut’s pressure over the part being secured. If the flange has serrations, these serrations bite into the material installed, making the nut less likely to loosen over time due to vibrations.

The flange on a flanged nut will turn with the nut whereas a washer often will not. The washer, due to its resistance to turning, thus helps to control wear at the mating surfaces. In effect, a washer will protect a surface more than a flanged nut. This can be huge if locking washers are also being used on the joint.

Because of the serrations, they cannot be used with a washer or on surfaces that must not be scratched. The serrations help in preventing the vibration of the nut from moving the fastener, thus maintaining the holding power of the nut.

Using a hex nut and washer instead of a flange nut introduces an additional inner interface and the associated additional preload loss due to embedding and relaxation in that interface.

The flange acts as a washer, which allows the nut to fasten evenly to the installation material’s surface. … The serrations bite into the material installed, making the nut less likely to loosen over time due to vibrations.

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