0.625 Inch Carbon Steel 1/4-20 concealed head stud with a 0.375 Inch hex size and 0.344 Inch mounting hole.
                    | Label | Value | 
|---|---|
| A | 0.343 in | 
| Brand | Accurate Screw | 
| Display Name | 66590S20 | 
| Finish | None | 
| Hex Size | 0.375 in | 
| Length L | 0.625 in | 
| Material | Carbon Steel | 
| Model Number | 66590 | 
| Mounting Hole Size | 0.344 in | 
| Thread Size | 1/4-20 | 
| Label | Value | 
|---|---|
| A | 8.71 mm | 
| Brand | Accurate Screw | 
| Display Name | 66590S20 | 
| Finish | None | 
| Hex Size | 9.53 mm | 
| Length L | 15.88 mm | 
| Material | Carbon Steel | 
| Model Number | 66590 | 
| Mounting Hole Size | 8.74 mm | 
| Thread Size | 1/4-20 |