- These in hole well nuts have a flanged bushing with a brass machine nut molded into one end
- Tightening a conventional machine screw in the brass nut causes the insert to expand, making a secure fastening
| Type | Nut |
| Style | Well Nut |
| Size | 1/4"-20 |
| Material | Neoprene/Brass |
| Head Size | 0.625 |
| Overall Length | 0.641 |
| Shank Length | 0.594 |
| Shank Size | 0.5 |
| Head Thickness | 0.051 |
| Hole Size | 1/2" |
| Grip Range | .015-.111 |
| Outer Material | Neoprene |
| Inner Nut Material | Brass |
| Replaces O.E.M. Number | 528846, 4003120 |
