Product Description
UNF A2 Stainless Steel Serrated Flange Nuts
These UNF serrated flange nuts are manufactured from A2 stainless steel and feature an integral flange beneath the hexagon body. The flange spreads the clamping load over a wider area, while serrations on its underside grip the mating surface to help resist loosening.
Available in five imperial fine thread sizes, these nuts suit matching UNF bolts, screws and studs. A2 stainless steel provides corrosion resistance for many general engineering and maintenance applications.
Technical Specifications
| Nut Type | Hexagon serrated flange nut |
|---|---|
| Material | A2 stainless steel |
| Thread Form | Unified National Fine |
| Flange Style | Integral flange with serrated bearing face |
| Dimensional Reference | ASME B18.16.4 |
Available Sizes and Dimensions
Head and flange dimensions below are imperial reference dimensions. Flange diameter and overall height are maximum values.
| Thread Size | Threads Per Inch | Spanner Size | Maximum Flange Diameter | Maximum Overall Height |
|---|---|---|---|---|
| 10-32 UNF | 32 TPI | 3/8" | 0.500" | 0.219" |
| 1/4"-28 UNF | 28 TPI | 7/16" | 0.594" | 0.236" |
| 5/16"-24 UNF | 24 TPI | 1/2" | 0.680" | 0.283" |
| 3/8"-24 UNF | 24 TPI | 9/16" | 0.750" | 0.347" |
| 1/2"-20 UNF | 20 TPI | 3/4" | 1.031" | 0.458" |
Selecting Your Flange Nuts
Select the required thread size and pack quantity from the available options. Match both the diameter and threads per inch to your bolt or stud. UNF nuts are not interchangeable with UNC nuts of the same nominal diameter.
Allow sufficient clearance for the flange and tightening tool. The smallest size is No. 10-32 UNF; it should not be identified as a 3/16" thread.
Fitting Guidance
Start the nut by hand to ensure correct thread engagement, then tighten with a correctly fitting spanner or socket to suit the joint specification.
The serrations work by contacting the mating surface and may mark paint, coatings or softer materials. Consider the surface finish when selecting this nut style.
