Bi Directional 20mm Lead Screw Set With 300mm Length And Two Brass Nuts For 3D Printers Acme Thread 4mm Pitch 4mm Lead Right And Left Hand Boss Upgrade For 3D Printer Projects And CNC Machines

Bi-Directional 20mm Lead Screw Pair, 300mm Length
✔️ 20mm diameter, 4mm pitch, 300mm length, 2 brass nuts included

Bi-directional lead screw assembly with 20mm diameter and 4mm pitch, 300mm long, designed for 3D printers and CNC machines. Includes two brass nuts for precise linear motion and synchronized dual-screw operation.

✅ 20 mm diameter stainless steel lead screw with 4 mm pitch (0.157 in)
✅ Total length 300 mm (11.81 in); 140 mm per screw with a 20 mm middle joint
✅ Includes 2 x T20 brass nuts for easy mounting
✅ Right hand and left hand threads ensure synchronized motion and higher precision
✅ Durable, rust resistant stainless steel screw with chamfered ends for easy installation

💡 What is a handy question about lead screws used for in 3D printers and CNC machines?

A handy explanation helps buyers understand core benefits.
- bidirectional lead screw improves synchronization for precise motion
- 20 mm diameter with 4 mm pitch fits standard printers and compact CNCs
- brass nuts reduce wear and provide smooth operation