Carmex Thread Turning External Insert - American Butress - Left Hand - 11EL20ABUTBMA S&E Left-hand spiral flute with right-hand

Left-hand spiral flute with right-hand cutting for efficient cutting: Optimizes chip evacuation and cutting stability

stable cut for a clean finish

ISO H5 tolerance for precise hole sizing: Finishes holes to a tight

With a precise ISO H5 tolerance and DIN 212-B standard

The tool’s build—from M2 high‑speed steel to a spiral flute and straight shank—fits standard reaming setups and supports professional machining workflows

Carmex Thread Turning External Insert - American Butress - Left Hand - 11EL20ABUTBMA S&E Left-hand spiral flute with right-handCarmex Thread Turning External Insert American Butress Left Hand 11EL20ABUTBMA is a precision carbide insert for external thread turning. Part of Carmex's industry leading range, this laydown triangular insert is designed to cover the majority of thread standards in use today, delivering clean, accurate thread forms across a wide range of applications. Ideal for engineers, machinists, and technicians who value dependable performance, this left hand