E-Z Coil Kit Economy 1/4"-28 X 1D Unf Helicoil Thread Repair Insize Thread GO Ring Gauge 3/8"-16 UNC Series 4121-3C1 M4 x 16mm - 8

M4 x 16mm - 8 PCS

Range: 0–200 mm

MT3 Taper Straight shank

Range: 17/32"-1"

Sizing: Available in 100mm

E-Z Coil Kit Economy 1/4"-28 X 1D Unf Helicoil Thread Repair Insize Thread GO Ring Gauge 3/8"-16 UNC Series 4121-3C1 M4 x 16mm - 8Product Description: The E Z Coil Kit Economy 1 4" 28 X 1D UNF offers a practical and cost effective solution for repairing damaged threads in soft materials. These helical stainless steel wire inserts are designed to restore worn out threads while protecting newly tapped holes from stripping and wear. With heat resistance up to 800F, this kit is ideal for high temperature applications. It includes all the necessary tools and inserts for fast,