Rego-fix 3420.00000 ER20 Hex Collet Nut

Product Description

The REGO-FIX 3420.00000 is a hex collet nut designed for ER20 collet chuck systems used in CNC machining and precision toolholding applications. Manufactured from steel, this nut provides the clamping force required to seat ER20 collets securely within compatible toolholders. The hex profile allows installation and removal with a standard HI-Q spanner, making it a practical service replacement for machine shops and tooling technicians maintaining ER-style chuck assemblies. It weighs 0.133 pounds and ships as a single unit.

This collet nut is intended for use in ER20 collet chuck toolholders found on CNC machining centers, milling machines, lathes with live tooling, and similar precision machining equipment. It is a direct replacement component suited for maintenance situations where the existing nut shows wear, thread damage, or bearing surface deterioration that compromises clamping performance. Installation requires a HI-Q spanner wrench sized for ER20 hex nuts.

Key Features

• ER20 collet series compatibility for broad toolholder fitment
• Steel construction for durability under repeated torque cycles
• Hex profile designed for use with HI-Q spanner wrench
• Single-piece replacement unit - no coolant-through capability
• Lightweight at 0.133 pounds for minimal spindle load contribution

Compatibility

Designed as an OEM-style replacement hex collet nut for ER20 collet series toolholders. For use with HI-Q spanner wrenches. No coolant-through capability.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician with the spindle powered down and the machine in a safe, locked-out state per applicable LOTO procedures. Thread the collet nut onto the toolholder body by hand before applying a HI-Q spanner to achieve proper seating torque. Inspect the nut bearing surface and threads for wear before reinstalling; damaged threads can cause collet runout and workpiece inaccuracy. Follow the toolholder manufacturer's recommended torque specification for the ER20 nut size.