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| Item | Counterbore Set | |
| Type | Built-in Pilot | |
| Style | Nominal/Close Fit | |
| Number of Pieces | 7 | |
| Number of Flutes | 3 | |
| Screw Size | #6 to 1/2" | |
| Screw Type | Socket Head Cap Screws | |
| Bore Dia. (In.) | 0.228 to 0.757 | |
| Pilot Dia. (In.) | 0.138 to 0.500 | |
| Pilot Length (In.) | 7/32 to 1/2 | |
| Shank Dia. (In.) | 7/32 to 1/2 | |
| Overall Length (In.) | 3 to 6 | |
| Material | Cobalt Steel | |
| Sizes Included | #6, #8, #10, 1/4, 5/16, 3/8, 1/2" |
The "Usually Ships" reflects when an item is generally expected to ship from Grainger based on its stocking location. Real-time availability information will be shown during the checkout process and on the e-mail order confirmation (for U.S. and Puerto Rico - US customers only). Please allow additional delivery time for international orders.






