About Counterbores
Counterboring—Enlarge the top of an existing hole to create a cylindrical-shaped opening with a flat bottom that acts as a seat for the head of a screw or wood plug.
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Mil. Spec. Counterbores for Hydraulic Ports
MS33649 and SAE AS5202
MS16142, SAE J1926/1, and SAE J514
Create contoured profiles for installing hydraulic ports in accordance with military and SAE specifications. The built-in pilot maintains alignment in the hole.
For technical drawings and 3-D models, click on a part number.
Shank | Lg. | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
For Thread Size | Series Number | Dia. | Lg. | Pilot | Overall | Number of Flutes | Flute Style | For Use On | Each | |
Uncoated Steel | ||||||||||
MS33649 and SAE AS5202 | ||||||||||
3/8"-24 | NB-3 | 0.4995" | 2" | 0.598" | 5 1/16" | 4 | Spiral | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 0000000 |
1/2"-20 | NB-5 | 0.4995" | 2" | 0.671" | 5 5/32" | 4 | Spiral | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
7/16"-20 | NB-4 | 0.4995" | 2" | 0.671" | 5 5/32" | 4 | Spiral | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
9/16"-18 | NB-6 | 0.4995" | 2" | 0.724" | 5 3/16" | 4 | Spiral | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
3/4"-16 | NB-8 | 0.4995" | 2" | 0.849" | 5 5/16" | 4 | Spiral | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
MS16142, SAE J1926/1, and SAE J514 | ||||||||||
3/8"-24 | SAE-3SS | 0.5000" | 2" | 0.473" | 3 3/4" | 4 | Spiral | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
1/2"-20 | SAE-5SS | 0.7500" | 2 1/32" | 0.552" | 4" | 4 | Spiral | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
7/16"-20 | SAE-4SS | 0.5000" | 2" | 0.552" | 3 3/4" | 4 | Spiral | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
9/16"-18 | SAE-6SS | 0.7500" | 2 1/32" | 0.614" | 4" | 4 | Spiral | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
3/4"-16 | SAE-8SS | 0.7500" | 2 1/32" | 0.696" | 4" | 4 | Spiral | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |