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M18 x 1.50 Multi-Form Carbide Thread Mill, Coolant-Through, 4 Flutes, 15° Right Hand Spiral, Right Hand Cut, TiAIN Coated - 1.250" Thread Length x 1/2" Shank x 3.5" OAL

L421D670
L421D670
L421D670
Weight: 0.2752 LBS
Brand: YG-1 TOOL CO.
$387.61
(34% off)
$255.82
each
7/31/2026
Product Description

Yg-1 Carbide Thread Mills Are Designed With A 15° Helix, Right Hand Spiral, Right Hand Cut For Milling Internal Threads And Can Produce Threads Of The Same Pitch In A Wide Range Of Holes Sizes. Yg-1 Thread Mills Are Universally Applicable In Virtually Any Iso Material Group. The Same Thread Mill Can Produce Right Hand Threads And Left Hand Threads With A Simple Program Change. The Same Thread Mill Can Produce Any Class Of Fit. Yg-1 Thread Mills Are Capable Of Producing Full Threads Right To The Bottom Of A Blind Hole.

  • YG-1 Solid Carbide Thread Mills For Internal Metric Threads, Series L421D:
  • For milling 60° internal Metric threads per DIN13
  • With axial coolant hole through the tool for superior chip evacuation in blind holes
  • 15° helix, right hand spiral, right hand cut
  • Multi-form thread profile enables thread milling in a single pass
  • Produces right hand threads and left hand threads
  • For thread milling through holes or blind holes
  • Capable of producing full threads to the bottom of the hole
  • The same thread mill can produce any Class of Fit
  • Hold tight tolerance pitch diameters with program offset changes
  • Low cutting forces make thread mills a perfect solution for underpowered machines
  • No issues with chip control as the short chips eliminate bird nesting typically associated with spiral flute taps
  • Very low chance of scrap with the ease of removing broken tools from the workpiece
  • Excellent thread finish with greater control over cutting condition than with tapping
  • Made from premium micro grain carbide substrate with PVD TiAlN coating

This item is part of our complete offering of YG-1 Cutting Tools, trusted for high-performance CNC machining, consistent quality, and broad application coverage across milling, drilling, threading, tool holding, and indexable operations. Browse YG-1 End Mills for carbide and cobalt milling solutions, YG-1 Hole Making Tools for drills and reamers, YG-1 Threading Tools for taps and thread mills, YG-1 Tool Holders for dependable tool holding solutions, and YG-1 Indexable Tooling for productive insert-based machining. You can also visit our main YG-1 Cutting Tools page to shop the full line and compare sizes, coatings, and performance styles for your application.

Made in Korea, Republic of
Shipping & Delivery Options
VERNON HILLS, ILLINOIS, USA
  • UPS

Suncoast Shipping Deals

Min. order amount Shipping Option Special Rate Max Weight
$399.00 UPS Ground 1 – 4 Business days (Lower 48 States) $0.00 10 LBS
$75.00 Economy (5 - 7 days)**
(This deal only applies to our Local Florida in stock items)
$0.00 5 LBS
$25.00 UPS Ground 1 – 4 Business days (Lower 48 States) $8.99 15 LBS
$499.00 UPS Blue 2 Business Days $9.99 7 LBS
$399.00 UPS Blue 2 Business Days $13.99 5 LBS
$50.00 UPS Blue 2 Business Days $15.99 6 LBS
$50.00 UPS Red by 10:30am 1 Business Day $31.99 2 LBS
Note: Special vendor shipping deals are destination-based and may not be available in all ZIP codes. If this rate is not available for your shipping address, standard shipping options will be shown at checkout.
$25.00 MINIMUM ORDER
If Ordered By 3pm Eastern Standard Time YG Will Ship Same Business Day
Factory Stock
6

Additional Product Details

Technical Details

Manufacturer
YG-1 TOOL CO.
Manufacturer Part Number
L421D670
Cutter Diameter
0.490"
Thread Size
M18 x 1.50
Overall Length
3.500"
Shank Diameter
0.5000" 1/2"
Number Of Flutes
4
Helix Angle
15°
Thread Direction
Right or Left
Thread Length
1.250"
Thread Type
Metric
Tool Coating
TiAIN
Tool Substrate Material
Carbide
Hand Cutting Direction
Right Hand Cut
Country of Origin
Korea, Republic of
Hand Helix Direction
Right Hand Spiral
Series
L421D
Type
Multi-Form
Shank Type
Plain Shank
Threads Per Inch
N/A
Thread Pitch
1.50
Coolant Through
With Coolant Hole