Combination nut and washer that compensates whenever a stud and clamping surface are not exactly perpendicular. Heavy-hex nut, similar to a Flange Nut, except with a convex spherical radius underneath. The washer has a matching concave spherical radius. Made in USA.

| Stainless Steel | |||||
| Material | Heat Treat | Finish | DFARS | RoHS | |
| 300-Series Stainless Steel | - | Passivated | โ | โ | |

| Thread Size | Hex (Inch) | A Diameter (Inch) | B (Inch) | C Diameter (Inch) | R (Inch) |
| 1/2-13 | 7/8" | 1-1/8" | 7/8" | 9/16" | 1-1/2" |