15/32" Thunderbolt® Black Oxide Drill Bit

The Milwaukee 48-89-2736 is a 15/32" Thunderbolt® black oxide jobber drill bit, designed for general-purpose drilling in metal, wood, and plastic. It’s one of the larger standard sizes in the Thunderbolt series, commonly used for heavy-duty fastening and structural hole drilling.

Key Features

• Black oxide coating – reduces friction and helps resist corrosion
• 135° split point tip – starts on contact and prevents walking for accurate drilling
• Thunderbolt reinforced web – thicker core improves strength and resists breakage under side load
• Parabolic flute design – clears chips quickly for cooler, faster drilling
• 3-flat Secure-Grip shank – reduces slipping in the drill chuck

Specs

• Size: 15/32 in
• Material: High-speed steel (HSS)
• Finish: Black oxide
• Length: ~5-3/4 in jobber length
• Use: Metal, wood, PVC, plastics

Best Uses

• Large bolt and anchor holes
• Structural steel and fabrication work
• Construction framing and heavy assembly
• General shop/jobsite drilling
• Drilling for larger fasteners and hardware