ER Collet Nuts

Shop our selection of ER Collet Nuts designed for secure, reliable toolholding in CNC machining and milling applications. Our collection includes Standard Hex and Round UM Collet Nuts, providing dependable clamping performance for ER collet chuck systems.

Manufactured from high-quality chromium steel for strength, durability, and long service life, these collet nuts are designed to provide consistent clamping force and proper seating of the ER collet within the tool holder. Choose from standard hex-style nuts for conventional wrench tightening or round UM-style nuts for use with the appropriate ER spanner wrench.

Ideal for replacing worn or damaged collet nuts or keeping spares on hand, our ER Collet Nuts provide a dependable solution for everyday CNC machining, milling, drilling, and general-purpose toolholding applications.