10 Best Straight Flute Thread Mills 2025

When it comes to threading tools, one thing you don't want to compromise on is quality. That's why we've reviewed and scored many products in the straight flute thread mills category, ranging from a 7.6 score up to an impressive 9.8 score. And the brand that stood out from the crowd? None other than Micro 100 with their ITL-100600 threading tool. This left-handed tool is perfect for UN threading with a range of 24-56 TPI and thread sizes, making it a versatile addition to any toolkit. With a maximum bore depth of 600" and a 1/8" shank diameter, this uncoated tool is built to last. Don't settle for anything less than the best – trust Micro 100 to deliver the quality you deserve. Keep reading to discover more top-rated straight flute thread mills on our list!