Login
Our website has been updated as of Oct 14, 2025.
If you are unable to login with your password,
please try the Reset Password link.
If Reset Password does not respond with the a Password Reset message, please re-register your account.
Register
Allied Machine & Engineering AccuThread™ 856® HDTMNK0250-NPT Helical Flute Heavy Duty Thread Mill, 1/4-18, 3/8-18 NPT Thread, 3-1/2 in OAL, 4 Flutes, 3/8 in Dia Shank
Price$234.90
Item #AMEHDTMNK0250NPT
BrandAllied Machine & Engineering
ManufacturerAllied Machine & Engineering
Mfr. Model #HDTMNK0250-NPT
Country of OriginUS
UNSPSC Code27112806
UnitEA
DGI AvailabilityCall for Availability
Product Features
• AccuThread 856® standard cutting lengths allow for multiple applications without the need for special threadmills
• Helical flute which offers increased strength and rigidity when forces are applied
• Allied's proprietary AM210® coating provides a 25 to 50% increase in tool life over the competition
• Internal/external thread
• Thicker core for increased strength
• Sub-micrograin size carbide substrate for strength and toughness
• Heavy duty geometry for tough materials (40+ rc steels, aerospace alloys, etc)
• Solid carbide materia
Description
Allied Machine & Engineering AccuThread™ 856® Thread Mill, Helical Flute Heavy Duty, 1/4-18, 3/8-18 Thread, NPT Thread, 0.363 in Diameter Cutting, 0.68 in Length of Cut, 3-1/2 in Overall Length, 4 Flutes, Cylindrical Shank, 3/8 in Shank Diameter
The AccuThread 856 is AMEC's premium threadmilling product range, manufactured from micro grain carbide and coated in AMEC's AM210® premium coating. This product is designed for the demanding environment of high production threadmilling, providing extraordinary tool life and exceptionally high quality thread forms. The AccuThread range is available in a wide selection of thread standards and forms part of our specials program, allowing you to tailor design threadmills to your specific requirements.