dura-flex

Prevailing Torque Six-Lock, Flex Locknut

The DURA-FLEX all-metal prevailing-torque locknut features a slotted collar, which creates six flex-locking elements along its top. When installed, these elements provide a solid locking mechanism.

DURA-FLEX locknuts are available in sizes up to 3ā€ in diameter, with special-light or heavy-torque-installed versions. These flex locknuts can be ordered in American Standard and Metric: hex finished, jam, heavy thin, heavy full, finished, jam, hi, and specials.

Materials

Steel grade 2-5-8, 2H/DH, Monel, brass, bronze, stainless steel, and a selection of exotic metals

Threads

UNC, UNF or 8UN Series, Class 2B, 3B, left-hand thread, and Metric

Finishes

Plain, zinc, and cadmium, as well as other platings and coatings

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Diagram of a DURA-FLEX locknut, showing the slotted collar with six flex-locking elements along the top.