Skip to content
FREE SHIPPING ON ORDERS OVER $200
FREE SHIPPING ON ORDERS OVER $200

High-Performance Square 3-Flute End Mills

Explore Star Tool Inc's square 3-flute end mills, perfect for efficient material removal and precision cutting. Available in various sizes and coatings for top performance. Free shipping on orders over $200.

Star Tool Inc End Mill 5/16" x 3 Fl Performer Carbide End Mill, 3" OAL x 1-1/4" LOC w/ Square Corner EM-516331250SQ
$18.95 - $18.95
$18.95
$18.95 - $18.95
$18.95

5/16" x 3 Fl x 3" OAL x 1-1/4" LOC w/ Square Corner | Carbide End Mill

Star Tool Inc
34 in stock

Diameter - 5/16" Flutes - 3 Overall Length - 3" Length of Cut - 1.250" Radius - Square Corner Coating - Uncoated

$18.95 - $18.95
$18.95
$18.95 - $18.95
$18.95
Star Tool Inc End Mill 5/16" x 3 Fl Performer Carbide End Mill, 3" OAL x 1-1/4" LOC w/ B/N EM-516331250BN
$21.50 - $21.50
$21.50
$21.50 - $21.50
$21.50

5/16" x 3 Fl x 3" OAL x 1-1/4" LOC w/ B/N | Carbide End Mill

Star Tool Inc
5 in stock

Diameter - 5/16" Flutes - 3 Overall Length - 3" Length of Cut - 1.250" Radius - Ball Nose Coating - Uncoated

$21.50 - $21.50
$21.50
$21.50 - $21.50
$21.50
Star Tool Inc End Mill 5/16" x 3 Fl Performer Carbide End Mill, 3" OAL x 1-1/4" LOC w/ .010 R EM-516331250010
$19.95 - $19.95
$19.95
$19.95 - $19.95
$19.95

5/16" x 3 Fl x 3" OAL x 1-1/4" LOC w/ .010 R | Carbide End Mill

Star Tool Inc
18 in stock

Diameter - 5/16" Flutes - 3 Overall Length - 3" Length of Cut - 1.250" Radius - .010 Coating - Uncoated

$19.95 - $19.95
$19.95
$19.95 - $19.95
$19.95
Star Tool Inc End Mill 5/16" x 3 Fl Performer Carbide End Mill, 3" OAL x 1-1/4" LOC w/ .030 R EM-516331250030
$19.95 - $19.95
$19.95
$19.95 - $19.95
$19.95

5/16" x 3 Fl x 3" OAL x 1-1/4" LOC w/ .030 R | Carbide End Mill

Star Tool Inc
13 in stock

Diameter - 5/16" Flutes - 3 Overall Length - 3" Length of Cut - 1.250" Radius - .030 Coating - Uncoated

$19.95 - $19.95
$19.95
$19.95 - $19.95
$19.95
Star Tool Inc End Mill 5/16" x 3 Fl Performer Carbide End Mill, 3" OAL x 1-1/4" LOC w/ .060 R EM-516331250060
$19.95 - $19.95
$19.95
$19.95 - $19.95
$19.95

5/16" x 3 Fl x 3" OAL x 1-1/4" LOC w/ .060 R | Carbide End Mill

Star Tool Inc
19 in stock

Diameter - 5/16" Flutes - 3 Overall Length - 3" Length of Cut - 1.250" Radius - .060 Coating - Uncoated

$19.95 - $19.95
$19.95
$19.95 - $19.95
$19.95
Star Tool Inc End Mill 5/16" x 3 Fl Performer Carbide End Mill, 3" OAL x 1-1/4" LOC w/ .090 R EM-516331250090
$19.95 - $19.95
$19.95
$19.95 - $19.95
$19.95

5/16" x 3 Fl x 3" OAL x 1-1/4" LOC w/ .090 R | Carbide End Mill

Star Tool Inc
10 in stock

Diameter - 5/16" Flutes - 3 Overall Length - 3" Length of Cut - 1.250" Radius - .090 Coating - Uncoated

$19.95 - $19.95
$19.95
$19.95 - $19.95
$19.95
Star Tool Inc End Mill 5/16" x 3 Fl Performer Carbide End Mill, 3" OAL x 1-1/4" LOC w/ .120 R EM-516331250120
$19.95 - $19.95
$19.95
$19.95 - $19.95
$19.95

5/16" x 3 Fl x 3" OAL x 1-1/4" LOC w/ .120 R | Carbide End Mill

Star Tool Inc
10 in stock

Diameter - 5/16" Flutes - 3 Overall Length - 3" Length of Cut - 1.250" Radius - .120 Coating - Uncoated 

$19.95 - $19.95
$19.95
$19.95 - $19.95
$19.95

Want to Checkout using a Purchase Order? Sign up for a business account and get approved for net terms today!

YOUR CUTTING EDGE SINCE 1966

YOUR CUTTING EDGE SINCE 1966

Proudly Manufactured in Wichita, KS