31/64 Drill Bits

A #31 numbered drill bit measures approximately 0.1200 inches in diameter, which is close to the 1/8" (0.1250") fractional size but slightly smaller. It is commonly used for pilot holes and tapping applications where a precise, smaller diameter than 1/8" is required.

Our fractional drill bits are available in M35 Cobalt and Black & Gold oxide-coated high speed steel. Cobalt bits offer superior heat resistance and durability for hard metals like stainless steel, while Black & Gold coated bits provide a cost-effective option for general-purpose drilling in metal, wood, and plastic.

Step point bits feature a tiered design that allows a single bit to drill multiple hole sizes, improving efficiency for varied applications. Jobber length bits have a standard length-to-diameter ratio suited for general-purpose drilling. Both styles are available in fractional sizing, including near 31/64", for industrial and workshop use.

Yes, our M35 Cobalt jobber drill bits are specifically designed for drilling stainless steel and other hard metals. The cobalt material resists the heat generated during high-speed drilling, maintaining sharpness and performance far longer than standard high speed steel bits in demanding metalworking applications.

A 135-degree split point, as found on our Cobalt Jobber Drill Bits, is ideal for metal drilling. This angle reduces bit walking on hard, smooth surfaces and ensures a precise, centered start, resulting in cleaner holes and reduced tool wear compared to standard 118-degree points.

Yes, volume and custom pricing is available upon request, including through our GSA MAS Contract for qualifying government and industrial buyers. Contact our team directly to discuss quantity needs for your shop, and we'll provide competitive pricing tailored to your order size.