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5/16" Diameter x 1/4" Shank x 60° Included Angle 1 Flute Single End Carbide Countersink-Monster Tool/GWS

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5/16" Diameter x 1/4" Shank x 60° Included Angle 1 Flute Single End Carbide Countersink-Monster Tool/GWS 5/16" Diameter x 1/4" Shank x 60° Included Angle 1 Flute Single End Carbide Countersink-Monster Tool/GWS 5/16" Diameter x 1/4" Shank x 60° Included Angle 1 Flute Single End Carbide Countersink-Monster Tool/GWS
GWS TOOL GROUP
331004050
331-004050
331-004050
UPC: 888226077330
Weight: 0.1 LBS
Brand: GWS TOOL GROUP
$46.80
(32% off)
$31.65
each
Add To My Favorites Coupon Available
Technical Details & Downloads
Speed and Feed Chart Catalog Page
Product Description

5/16" Diameter X 1/4" Shank X 60° Included Angle 1 Flute Single End Carbide Countersink 60 Degree Angle,1 Flute,1/4" Shank Made From C-2 Sub-Micron Grain Carbide With 10% Cobalt Content For Unparalleled Wear Resistance. Single Flute Design Offers The Most Control And The Best Centering. Up To ¼” Diameters Are Solid Carbide. Larger Diameters Are Solid Carbide Head Brazed To Hss Shank. 60° - Designed Especially For Creating Holes That Will Be Used Between Centers. 82° - Creates Holes That Match The Angle Of The Most Popular Screw Heads. 90° - Creates Holes That Match The Angle Of The Second Most Popular Screw Heads. Made In The Usa. Gws/Monster Tool Part #331-004050

  • Sub-micrograin carbide substrate for wear resistance.
  • General purpose countersinking operations.

This item is part of our complete offering of GWS Tool Group Cutting Tools, a USA manufacturer known for high-performance CNC machining solutions, custom-engineered tooling, and advanced coating technologies. Explore GWS End Mills and Milling Products for high-performance carbide milling, GWS Hole Making Tools for drilling and finishing applications, GWS Threading and Gaging Tools for taps, thread mills, dies, and gages, GWS Blanks, Rods and Strips Solid Carbide for carbide stock solutions, and GWS Armory Tools for specialty firearm component machining applications. GWS Tool Group brings together respected legacy brands including Monster Tool, Balax Taps, and Benchmark HP Carbide End Mills, combining their strengths into a powerful portfolio of milling, holemaking, threading, and specialty cutting tools manufactured in the USA. Visit our full GWS Tool Group Cutting Tools page to explore the complete product range, compare tool geometries, coatings, and performance options, and find the right solution for your application.

Made in U.S.A.
Shipping & Delivery Options
Vista, CA
  • UPS

Suncoast Shipping Deals

Min. order amount Shipping Option Special Rate Max Weight
$50.00 UPS Blue 2 Business Days $14.99 8 LBS
$50.00 UPS Red by 10:30am 1 Business Day $29.99 8 LBS
$98.00 MINIMUM ORDER
If ordered by 1:30pm Eastern Standard Time GWS will Ship Same Business Day
Factory Stock
18
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Additional Product Details

Technical Details

Manufacturer
GWS TOOL GROUP
Manufacturer Part Number
331-004050
Tool Diameter
0.3125" 5/16"
Overall Length
2-1/8"
Shank Diameter
1/4"
Number Of Flutes
1
Tool Coating
None
Tool Substrate Material
Carbide
Included Angle
60°
Country of Origin
U.S.A.
Single Or Double End
Single End
Free Shipping
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Offer Good Online, Minimum $499 in Purchases, max weight 10 Pounds, on the entire site! Offer good through Sunday

Promo good on Sunday, Saturday until 6/28/2026 FREESHIPWEEKENDS
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