| Key ^ | Value |
|---|---|
| Bore Dia. | 1/2 in |
| Counterbore Type | Oversized |
| Finish - Machining | Bright (Uncoated) |
| For Screw Size | 5/16 in |
| Item | Counterbore |
| Material - Machining | Cobalt |
| Measurement System | Fractional Inch |
| Number of Flutes | 3 |
| Overall Length | 4 1/2 in |
| Oversized Increment | 1/32 in |
| Pilot Dia. | 21/64 in |
| Pilot Length, Shank Dia. | 3/8 in |
| Primary Material Application | All Materials |
| Primary Material Application ISO Code | S3 |
| Shank Type - Machining | Straight |
| Size - Decimal | 5/16 in - 0.3125 |
| Spiral Direction | Right Hand |
| Standards | ISO 9001:2008 |