Skip to Main Content

For security, click here to clear your browsing session to remove customer data and shopping cart contents, and to start a new shopping session. 

Tractor Supply Co.

We Are Listening...

Say something like...

"Show me 4health dog food..."

You will be taken automatically
to your search results.

Please enable your microphone.

Your speech was not recognized

Click the microphone in the search bar to try again, or start typing your search term.

We are searching now

Your search results
will display momentarily...

Main Content
MESSAGE

Mibro 5/16 in. Diameter Cobalt Steel Drill Bit, 250381

SKU: 390740599
Mibro 5/16 in. Diameter Cobalt Steel Drill Bit, 250381
Enter Zip Code for price More Info
Product price

Save Up To
See price at checkout More Info
Product Rating is 5.0
5.0
 (3)

Quantity

TSC of  #

,
TSC of  #

,
TSC of  #

,
TSC of  #

,
Check Availability at Other Stores
Standard Delivery Not Available to 
Notice: This item will ship within 0 days.
This product may require up to 0 additional days for order processing prior to shipping.
Change Delivery Location

Item Information

Designed to make precise holes in hard metals such as stainless steel this precision ground drill is made with cobalt high speed steel to withstand the heat and pressure of drilling into hard materials

  • Use on wood, wood composites, plastics and all metals including hard metals such as stainless steel
  • Made with M35 High Speed Steel containing 5% cobalt for superior heat resistance
  • Fully ground manufacturing ensures straighter more precise holes
  • Drill body features a tapered core for increased strength
  • 135° split point tip eliminates the need for a center punch and keeps the drill bit from walking
  • 3 flats on the drill's shank insure that it is held tightly in the drill chuck

Specification Description
Part Number: 250381
Application/Use: Use on wood, wood composites, plastics and all metals including hard metals such as stainless steel
Product Height: 0.31
CountryofOrigin: Imported
Minimum Chuck Size: 3/8 in.
Shank Diameter: 5/16 in.
Brand: Mibro
Package Quantity: 1
Bit Diameter: 5/16 in.
Product Weight: 0.07
Hole Diameter: 3/8 in.
Housing Material: Steel
Product Width: 0.31
Product Length: 4.63
Product Length: 7-7/8 in.
Additional Item(s) Included: None
Product Width: 1-5/8 in.
Number of Items Included: 1
Manufacturer Part Number 250381
Mibro 5/16 in. Diameter Cobalt Steel Drill Bit, 250381 is rated 5.0 out of 5 by 3.
Rated 5 out of 5 by from Allsome I have used this bit for many holes, and it is still cutting on contact.
Date published: 2019-07-26
Rated 5 out of 5 by from Excellent product! I am currently building a project for the ranch and am using a great deal of metal. As a result, I am using The MIBRO TOUGH METALS COBALT drill bits. They are the best bit for the money I've found and I particuarly like the the "flats" in the shaft to keep the bit from spinning in the chuck as well as the cutting properties.
Date published: 2010-08-19
  • y_2020, m_3, d_30, h_12
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.5
  • cp_1, bvpage1
  • co_hasreviews, tv_1, tr_2
  • loc_en_US, sid_390740599, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_tractorsupply
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • LOCAL, getContent, 4ms
  • REVIEWS, PRODUCT

Are these M35 5% or M42 8% Cobalt?

Asked by: JKirk
Dear Customer, Thank you for your interest. MIBRO branded cobalt drill bits are made of M35 steel. Sincerely, MIBRO Customer Care
Answered by: MIBRO Customer Care Team
Date published: 2019-05-27
  • y_2020, m_3, d_30, h_12CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.5
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_1
  • loc_en_US, sid_390740599, prod, sort_[SortEntry(order=FEATURED, direction=DESCENDING)]
  • clientName_tractorsupply
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • LOCAL, getContent, 4ms
  • QUESTIONS, PRODUCT