ALORIS AT-4R CARBIDE THREADING INSERTALORIS AT-4R CARBIDE THREADING INSERT A6 UNCOATED STEEL GRADE, 6-48 TPI, 5 PER BOX This is a 60-degree carbide insert that is made specifically for use in Aloris' AT-86 threading insert cartridge. That cartridge then fits on the Aloris AT-8 threading toolholder. This is a A-6 steel cutting grade and a A-2 cast iron grade is available, as is a 767 TiN Coated steel cutting grade.
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