Loctite Grade C Threadlocker 50ml

Loctite Grade C Threadlocker is a commercial-grade, medium-strength anaerobic adhesive engineered specifically for precision industrial assembly. Formulated to lock and seal fine-threaded nuts, bolts, and studs, this commercial threadlocker prevents component loosening caused by vibration, shock, and thermal expansion while remaining removable with standard hand tools.

Key Performance Features

• Medium Strength & Viscosity: Provides reliable threadlocking and sealing for fine-threaded fasteners without risking permanent assembly locking.
• Mil-Spec Compliant: Tested to the lot requirements of Military Specification Mil-S-22473E (regional approval).
• Anaerobic Curing Mechanism: Cures efficiently in the absence of air when confined between tight-fitting metal surfaces.
• Vibration & Shock Resistance: Protects critical assemblies, machinery, and equipment against tension relaxation under operational stress.

Technical Specifications

• Product Name / Part Number: Loctite Grade C 
• Strength Class: Medium
• Viscosity: Medium / Low-Viscosity
• Color: Blue
• Curing Type: Anaerobic
• Primary Application: Threadlocking and thread sealing (fine threads)
• Thermal Disassembly Limit: Localized heating to approx. 250 °C (for long engagement lengths)
• Optimal Storage Temperature: 8 °C to 21 °C (Storage below 8 °C or above 28 °C may compromise adhesive integrity)
• Quality Standard: LMS dated August 23, 1999

Application & Assembly Guidelines

• Surface Preparation: Ensure surfaces are clean, dry, and oil-free using a degreasing agent.
• Inactive Metals / Accelerators: For inactive metals or cold ambient temperatures, pre-treat threads with surface activators.
• Dispensing Instructions:
  • Thru Holes: Apply several drops directly onto the bolt at the nut engagement zone.
  • Blind Holes: Apply drops inside the internal threads down to the bottom of the hole.
  • Sealing Applications: Dispense a 360° bead onto the male fitting's leading threads, leaving the first thread uncovered.
• Disassembly & Cleanup: Remove using standard hand tools. If excessive thread length increases breakaway torque, apply localized heat (~250 °C) and disassemble while hot. Remove cured residue with solvent soaking and wire brushing.

Substrate & Chemical Compatibility

• Not recommended for pure oxygen, oxygen-rich systems, chlorine, or strong oxidizing materials.
• Not recommended for use on thermoplastics due to the risk of stress cracking.
• Verify aqueous washing solution compatibility prior to bonding to avoid cure inhibition.

Frequently Asked Questions (FAQ)

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