ER Nut Set

This kit includes various specifications of ER series nuts (Type A, Type M, Type UM), crafted from high-quality alloy steel. Undergoing heat treatment and precision grinding, these nuts ensure high concentricity and long-lasting clamping performance.
They are suitable for CNC machine tools, milling machines, drilling machines, and engraving machines, and are widely used in mold manufacturing, metal processing, woodworking, and similar applications.
The nuts feature anti-rust surface treatment, high thread precision, smooth tightening, and long service life. This kit can be customized with a variety of model combinations to meet different clamping requirements.
Ordering Instructions
When placing an order, please be sure to specify the required models and quantities. For example: ER16A × 2 pieces, ER20M × 1 piece, to ensure accurate delivery.
Specification Table
Style Model Outer Diameter (mm) Height (mm) Thread Specification
Type A ER11 19 11.3 M14×0.75P
Type A ER16 28 18 M22×1.5P
Type A ER20 34 19.5 M25×1.5P
Type A ER8 12 10.8 M10×0.75P
Type M ER11 16 12 M13×0.75P
Type M ER16 22 18 M19×1.0P
Type M ER20 28 19 M24×1.0P
Type M ER25 35 20 M30×1.0P
Type UM ER25 42 20 M32×1.5P
Type UM ER32 50 23.5 M40×1.5P
Type UM ER40 63 25.5 M50×1.5P
Fine Thread ER16A 28 18 M19×1.0P
Fine Thread ER20A 34 19 M24×1.0P
What You Will Receive
ER nut kit (provided according to the ordered models and quantities)
Storage case × 1 (with protective inserts)
Packing list and commercial invoice
Quality inspection record (appearance and dimension inspection)
After-Sales Support
Missing or damaged items will be prioritized for replacement or resolution within 48 hours of receiving the goods.
Technical Support
Specification selection recommendations
Assembly guidance
Maintenance tips
Package Contents
ER nuts × N (selected according to the order)
Storage case × 1
Packing list × 1
Commercial invoice × 1
Shipping Information
Default international courier: DHL/FedEx/UPS
Shipping time: 2-5 working days after payment
Estimated delivery time: 7-15 working days (depending on the destination)
Tracking numbers are provided for all orders
Expedited shipping is available upon request (additional charges apply)