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Carbide tipped countersink bit is a 5/16 inch x 2-9/16 inch countersink from Amana Tool designed for countersinking holes to accommodate screw heads in wood, plastic, and non-ferrous materials, so holes match the screw head seating needs on these jobs. The carbide tipped construction delivers a significantly longer lifespan compared to steel countersinks, which reduces tool changes during repeated cabinet, fixture, or panel work. Its 2-flute integral design provides consistent, precise, and concentric results every time, helping screw heads sit evenly and improving finished surface appearance. The bit functions as a dedicated countersink in the bits, blades and cutters category, so it fits naturally into a workflow where pilot holes and countersinking are handled as separate steps for better control. The Amana Tool brand identity and CT countersink description identify it as a pro-grade choice for frequent use where dimensional repeatability matters.
This CT countersink, described as a NO6 screw countersink, is sized around #6 screw applications, which helps the recess match typical #6 screw head proportions in wood, plastic, and non-ferrous materials. The 5/16 inch diameter works with this sizing to create a countersink that clears the screw head without excessive overcut, supporting a neater look on visible faces. The 2-flute integral design keeps the cutting edges balanced around the center, which helps maintain concentricity between the drilled hole and the countersink profile so screws pull parts together evenly. Its 2-9/16 inch overall length also helps when working in thicker sections where both pilot drilling and countersinking must line up accurately through the full depth of the workpiece.
The web description states that this countersink is designed for holes to accommodate screw heads in wood, plastic, and non-ferrous materials, so it serves well in cabinet components, trim pieces, and light fixtures using these substrates. In wood applications, the carbide tipped edges and 2-flute integral layout help produce chip-free hole edges, which supports cleaner visible faces on cabinet sides, face frames, and doors. In plastic, the same chip-free performance helps reduce surface breakout around the countersink, improving the look of panels or guards. For non-ferrous materials, the durable carbide tips and concentric cutting action support smoother recesses where metal fasteners must sit flush with surrounding surfaces. The Bits, Blades and Cutters classification and Countersinks product class identify it as a dedicated countersink solution for these material groups rather than a general-purpose drill bit.
The product description highlights that the 2-flute integral design ensures consistent, precise, and concentric results every time, which directly affects how evenly a screw head sits in the countersink. Concentricity between the drilled hole and the countersink means the screw shank and head share the same centerline, helping parts draw together squarely when torque is applied. This same design also supports a smoother surface inside the countersink because two cutting edges share the load and balance the cut. The description specifies chip-free hole edges, so the cutting geometry and carbide tipped construction work together to reduce chipping at the entry of the countersink, which matters on painted, laminated, or exposed wood faces. Because the carbide tips offer a significantly longer lifespan compared to steel countersinks, users can maintain this level of surface quality and dimensional consistency over more holes before rotating tools out of service.
This carbide tipped countersink bit is designed for wood, plastic, and non-ferrous materials, so it supports typical cabinet, fixture, and light metal-trim work using one dedicated tool.
The carbide tipped construction offers a significantly longer lifespan compared to steel countersinks, reducing downtime from frequent bit changes during repetitive countersinking work.
The 2-flute integral design ensures consistent, precise, and concentric results every time, so screw heads seat evenly and surfaces stay cleaner around the countersink.
The CT countersink NO6 screw description indicates the geometry is intended for #6 screw heads, helping the recess fit common #6 fasteners used in woodworking assemblies.
The 5/16 inch diameter provides a compact countersink profile that clears the #6 screw head while limiting overcut, which supports a neat, controlled recess.
This Amana Tool countersink combines a carbide tipped cutting edge with a 2-flute integral design, supporting precise, chip-free, and long-running countersinking in wood, plastic, and non-ferrous materials.
The 5/16 inch x 2-9/16 inch Carbide Tipped Countersink Bit from Amana Tool is identified as a CT countersink for NO6 screw applications, so it aligns directly with #6 screw head seating in wood, plastic, and non-ferrous materials. Its 2-flute integral design and carbide tipped construction deliver consistent, precise, and concentric countersinks with chip-free hole edges, which supports cleaner visible surfaces and repeatable assemblies. For installers and serious DIY users preparing holes to accommodate screw heads with tight, predictable results, this dedicated countersink fits directly into a workflow focused on accuracy and surface quality.