Materials
• 18-8 Stainless Steel
Standard, general purpose material.
For use as original equipment or thread repair.
Stocked in most sizes.
• Nimonic 90
High temperature applications up to 650°C HELICOIL® free running or 500°C HELICOIL® screwlock.
• Inconel X750
High temperature applications up to 550°C HELICOIL® free running or 500°C HELICOIL® screwlock.
• Zeron 100
Super duplex stainless steel has superior corrosion and stress cracking resistance.
Essential requirements in the petrochem, fertiliser & mining industries.
• Phosphor Bronze
Salt water applications.
Non-magnetic.
Excellent electrical conductivity.
• Other Material
Continuous improvement programmes are researching new materials in the development of HELICOIL® for special applications. In particular, HELICOIL® screwlock in high temperature locations and special material for the Food and Pharmaceutical industries where stainless steel screws are used.
Surface treatment
• Cadmium Plating
Provides high corrosion resistance and lubrication to prevent galling.
Suitable up to 250°C
Colour: Iridescent yellow
Specifications
DEF STAN 03-19
QQ-P-416
Previously DTD904
• Silver Plating
To reduce galling of threads at high temperatures.
Colour: Silver white
Specifications
DEF STAN 03-9
BS2816:1989
Previously DTD939
• Zinc Plating
Provides corrosion resistance as an alternative to Cadmium.
Colour: Iridescent yellow
Specifications
DEF STAN 03-20
Previously DTD903
• Cadmium Plate & Olive Drab
As specified on US military specs such as NASM21209.
Colour: Olive Drab
Specifications
QQ-P-416
• Dry Film Lubricated
Additional lubrication in high friction applications.
Recommended for use with HELICOIL® screwlock inserts.
Colour: Grey
Specifications
MIL-L-8937
• ArmaGuard
Prevents galvanic corrosion between insert and parent material.
Eliminates the need for zinc primers.
Improves installation productivity.
Colour: Glossy Black
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