Heli-coil A3585-8CN1000 Screw-locking Insert 1/2-13 Unc

Product Description

The HELI-COIL A3585-8CN1000 is a tangless screw-locking wire thread insert designed to create durable, vibration-resistant threads in tapped parent material. Manufactured from Grade 304 stainless steel with a bright finish, it accepts a 1/2-13 UNC thread and measures 1.0 inch in overall length, giving it a 2D length-to-diameter ratio. The coiled design exerts a locking force on mating fasteners, resisting loosening under vibration and shock loads. Licensed machinists, maintenance technicians, and assembly professionals install these inserts to repair damaged threads or to reinforce threads in softer base materials. Maximum locking torque is 150 inch-pounds, with a minimum breakaway torque of 24 inch-pounds.

This insert is suited for applications in industrial machinery, heavy equipment, aerospace assemblies, and structural hardware where a 1/2-13 UNC thread form is required and long-term thread integrity is critical. The tangless design eliminates the need for tang removal after installation, reducing the risk of loose debris inside assemblies. With 11 free coils and an outside diameter range of 0.5970 to 0.6220 inches, it seats reliably in standard 1/2-13 UNC tapped holes prepared with the appropriate HELI-COIL installation tap.

Key Features

• Grade 304 stainless steel construction resists corrosion in wet or chemically exposed environments
• Tangless design eliminates post-installation tang removal and reduces debris risk
• Locking thread form holds maximum torque up to 150 inch-pounds
• Minimum breakaway torque of 24 inch-pounds maintains fastener retention under vibration
• 1/2-13 UNC thread standard fits common imperial fastener hardware
• Bright finish provides consistent surface condition for dimensional inspection

Compatibility

Designed for use in standard 1/2-13 UNC tapped holes prepared with the corresponding HELI-COIL installation tap for 2D tangless inserts. Suitable for steel, aluminum, cast iron, and other base materials where thread reinforcement or repair is required.

Installation Notes

Installation requires a properly sized HELI-COIL prewinder or installation tool matched to the 1/2-13 UNC tangless insert specification. The parent material bore must be tapped with the correct HELI-COIL tap to achieve the required outside diameter engagement. De-energize or lock out any equipment before performing thread repair on live assemblies. Follow applicable facility maintenance procedures and torque specifications for the mating fastener as defined by the equipment manufacturer.