Fractional, Letter and Number Drill Bit Sizes
Fractional, Letter and Number Drill Bit Sizes
Fractional, letter and number drill sizes cover different holemaking requirements and are common in repair, fabrication and machining.
Drill Bits for professional work
Cutting Tools Outlet organizes this selection by tool type, size, material and application so machinists, fabricators, maintenance teams, contractors and purchasing departments can reach the right configuration faster.
- Use fractional sizes for inch-based work, letters for intermediate diameters and numbers for fine increments.
- Compare the actual decimal diameter rather than relying only on the label.
- Keep a complete set nearby when hole size must be adjusted precisely.
Related tool types: Drill Bits.
Material coverage: Steel Cutting Tools, Carbide Cutting Tools.
Common applications: Drilling Tools.
Shop related collections
- Drill Bits for Metal, Steel & Stainless Steel
- Twist Drill Bits for Metal
- Champion Cutting Tools
- Steel Cutting Tools Tools for Metal Drilling Tools & Drill Bits
- Carbide Cutting Tools Tools for Concrete & Masonry Tools
- Metal Drilling Tools & Drill Bits
Recommended products
- 1/4" HSS Hex Shank Drills
- Champion 105-1/16 1/16" Solid Carbide Drill – 118° Point
- Champion 105-1/2 1/2" Solid Carbide Drill – 118° Point
- Champion 105-1/32 1/32" Solid Carbide Drill – 118° Point
- Champion 105-1/4 1/4" Solid Carbide Drill – 118° Point
- Champion 105-1/64 1/64" Solid Carbide Drill – 118° Point
- Champion 105-1/8 1/8" Solid Carbide Drill – 118° Point
Related buying resources
Need help choosing a size, thread, shank or replacement part? Request a quote from Cutting Tools Outlet.