3/16" Thunderbolt® Black Oxide Drill Bit (12 PK)

The Milwaukee 48-89-2828 is a 3/16" Thunderbolt® black oxide drill bit set (12-pack) designed for general-purpose drilling in metal, wood, and plastic.

It’s part of Milwaukee’s standard Thunderbolt jobber-length series, built for durability, strength, and consistent everyday drilling performance.

Key Features

• 135° split point tip – starts on contact and prevents walking for accurate holes
• Thunderbolt reinforced web – thicker core increases strength and reduces breakage
• Black oxide coating – reduces friction and improves corrosion resistance
• Parabolic flute design – clears chips quickly to keep the bit cool
• 3-flat Secure-Grip shank – helps prevent slipping in the chuck

Specs

• Size: 3/16 in (0.1875")
• Quantity: 12 bits per pack
• Material: High-speed steel (HSS)
• Finish: Black oxide
• Overall length: ~3-1/2 in
• Flute length: ~2-5/16 in
• Use: Metal, wood, PVC, plastics

Best Uses

• General construction drilling
• Pilot holes for medium fasteners
• Light metal fabrication
• Woodworking and framing
• Maintenance and shop work

Bottom Line

The 48-89-2828 sits right in the middle of the Thunderbolt size range—bigger than pilot-hole bits, but still a daily-use, general-purpose drill bit. It’s built for strength, accuracy, and repeat use, not specialty applications like long-reach or oversized drilling.