IFI145 Hex Serrated Flange Nuts

IFI 145 Hex Serrated Flange Nuts are designed for applications where reliable locking performance is required without the use of additional locking devices. The integrated flange increases the bearing surface under the nut, helping distribute the clamping force over a larger area, while the serrated teeth on the flange create a strong grip against the mating surface to reduce loosening caused by vibration. This design makes IFI 145 serrated flange nuts an efficient solution for assemblies that require secure and stable fastening.

The combination of a hexagonal body, wide flange base and serrated locking surface allows these nuts to provide both easy installation and dependable holding performance. Available in stainless steel, carbon steel and alloy steel options, IFI 145 Hex Serrated Flange Nuts are commonly used in automotive parts, machinery, electrical equipment and industrial assemblies where vibration resistance, assembly efficiency and long-term fastening reliability are important.

Specification of IFI 145 Hex Serrated Flange Nut:

IFI 145 Hex Serrated Flange Nuts are specified according to Industrial Fasteners Institute (IFI) requirements for serrated flange locking nuts. The specification focuses not only on basic dimensions, but also on the flange design, serration pattern, thread accuracy, material requirements and mechanical performance. The integrated flange provides a larger bearing surface, while the serrated underside is designed to improve resistance against loosening under vibration and dynamic loading conditions.

Depending on application requirements, IFI 145 Hex Serrated Flange Nuts can be supplied in different materials, including stainless steel, carbon steel and alloy steel, with various surface finishes and strength grades. The following table provides the main specifications of IFI 145 serrated flange nuts, including standard, material, thread type, size range and available finishes.

Dimension Chart of IFI145 Hexagon Flange Nut:

The dimensions of IFI 145 Hex Serrated Flange Nuts are designed to provide proper compatibility with matching bolts and assembly components. Key dimensions include thread diameter, thread pitch, width across flats, flange diameter and nut height. The flange size and serration design are important factors that influence load distribution and locking performance during installation.

The following dimension chart shows the standard sizes of IFI 145 Hex Serrated Flange Nuts for customer reference. By selecting the correct nut dimensions, engineers can ensure proper fit, sufficient clamping force and reliable performance in the final assembly.

Note:

1. Tops of Nuts. Tops of nuts shall be flat and chamfered, the length of chamfer at hex corners shall be from 5 to 15 percent of the basic thread size. The surface may be slightly convex or rounded.

2. Bearing Surface. Bearing surface shall be at right angle to axis of the threaded hole within a tolerance of 2 degrees; therefore, the maximum total angularity of bearing surface would equal the tangent of specified angle times the diameter of the flange.

3. Concentricity of Tapped Hole. Axis of tapped hole shall be concentric with axis of nut body within a tolerance equal to 3 percent (6 percent FIM) of the maximum width across flats.

4. Countersink. Tapped hole shall be countersunk on the bearing face and may be countersunk on the top. The maximum countersunk diameter shall be the thread basic (nominal) major diameter plus 0.030 in. for 3/8 in. nominal size nuts and smaller, and 1.08 times the basic major diameter for nuts larger than 3/8 in. No part the thread portion shall project beyond the bearing-surface.