Loctite LOCTITE-620 (50-ml)

Additional Product Information

Overview

LOCTITE 620 is a high-performance anaerobic retaining adhesive designed for bonding cylindrical metal components in aviation and MRO applications. It provides maximum strength in confined assemblies, resists shock and vibration, and performs reliably at elevated temperatures. Maintenance teams rely on it to ensure long-lasting retention of bearings, bushings, and pins, reducing downtime and enhancing operational safety.

Key Technical Specs for LOCTITE 620

• Type: Acrylic Methacrylate Ester
• Appearance (Uncured): Green liquid
• Viscosity / Consistency: High viscosity, 8,500 mPa s (cP) at 25 C, spindle 5, 20 rpm
• Cure / Working Time: Anaerobic cure; accelerated with Activators SF 7471 or SF 7649
• Tensile / Peel Strength: Compressive shear strength 17 N/mm (2,500 psi) @ 23 C; 24 N/mm (3,500 psi) after heat cure
• Shore Hardness: Not specified
• Service Temperature: Up to 177 C (350 F) for high-strength applications
• Typical Uses: Retaining bearings, bushings, sleeves, locating pins; prevents loosening under vibration
• Shelf Life: Store 8 21 C (46 70 F) in unopened container; avoid contamination and extreme temperatures

Approvals & Specifications

• OEM & military specifications available via Henkel representative
• Not recommended for use in pure oxygen or strong oxidizers
• Compliance with ISO 10123 for shear strength testing

Typical Aircraft MRO / AOG Applications

• Locking bearings in engine assemblies
• Securing bushings and sleeves in landing gear components
• Retaining pins and shafts in hydraulic systems
• Maintenance of high-temperature radiator assemblies
• Aircraft transmission and gearbox component retention

Compatibility & Safety Notes

• Compatible with steel, aluminum, and zinc dichromate surfaces
• Not generally recommended for plastics, especially thermoplastics prone to stress cracking
• Use PPE including gloves and eye protection
• Avoid exposure to moisture and contamination during assembly
• Consult Safety Data Sheet (SDS) for full handling instructions

Packaging & Procurement

• Available in standard industrial sizes; consult Henkel for specific market packs
• Store in unopened containers at 8 21 C (46 70 F)
• Easy application for slip-fitted, press-fitted, and shrink-fitted assemblies
• Requires cleaning of surfaces before application for optimal adhesion

Why LOCTITE 620 is Chosen for AOG / MRO

• Delivers fast, reliable curing even in confined spaces
• High temperature and vibration resistance ensures component longevity
• Versatile for a range of metal substrates and bond gaps
• Minimizes aircraft downtime and maintenance interventions

Practical Suggestions for Your Team (AOG Mindset)

• Stock key sizes for rapid response in AOG scenarios
• Train maintenance personnel on correct assembly techniques
• Use activators for larger bond gaps to accelerate curing
• Ensure thorough surface cleaning to maintain bond integrity
• Label and store containers under recommended temperature conditions

Manufacture / Aviation Spec Codes

• Manufacturer: Henkel Corporation
• Product ID: LOCTITE 620
• MIL/OEM/Export Codes: Contact Henkel representative for details

Alternative Names & Descriptions

• Henkel LOCTITE 620 Retaining Compound
• LOCTITE 620 Anaerobic Adhesive
• LOCTITE 620 Bearing Retainer
• LOCTITE 620 High-Temperature Retaining Adhesive
• LOCTITE 620 Medium to High Strength Retainer