Permabond HH120 High-Strength Threadlocker

Description

Permabond® HH120 is a high-strength anaerobic threadlocker designed for permanent assembly of bolts, nuts, and screws. Its thick, non-drip viscosity makes it ideal for coarse-threaded fasteners, while its superior vibration resistance prevents loosening in high-stress applications. This heavy-duty adhesive cures reliably on steel, zinc, cadmium, and other plated fasteners, making it an excellent choice for machinery, construction, and heavy equipment.

For customers seeking alternatives to Loctite® 277, 3M™ Scotch-Weld™ TL77, and Permatex® Large Diameter Threadlocker Red, Permabond HH120 provides a comparable, high-performance solution that meets strict MIL-SPEC requirements for reliability in extreme environments.

Key Features & Benefits

✅ Permanent, High-Strength Locking – Designed for large-diameter fasteners where disassembly is not required
✅ MIL-SPEC Compliant – Meets MIL-S-22473E Grade AVV (Group 01, Class 2, Grade 4) and MIL-S-46163A Type I Grade L (Group 02, Class 1, Grade 1)
✅ Superior Vibration Resistance – Prevents loosening under extreme mechanical stress
✅ Corrosion & Environmental Protection – Shields fasteners from rust, moisture, and harsh chemicals
✅ Thick, Non-Drip Formula – Ideal for coarse-threaded fasteners and vertical applications
✅ Fast Curing – Handling strength in 10 minutes, full cure in 24 hours
✅ 100% Solids, Solvent-Free – Environmentally friendly, safe for industrial applications

Technical Specifications

• Viscosity: 7,000 mPa.s (thick, non-drip)
• Gap Fill: 0.25 mm (0.01 in)
• Maximum Thread Size: M30 (1½”)
• Handling Strength: ~10 minutes at 23°C (73°F)
• Working Strength: 30 minutes
• Full Cure Time: 24 hours
• Torque Strength (M10 Steel, ISO 10964):
  • Break: 31 N·m (275 in.lb)
  • Prevail: 34 N·m (300 in.lb)
• Shear Strength (Steel Collar & Pin, ISO 10123): 17 MPa (2500 psi)
• Temperature Range: -55°C to 150°C (-65°F to 300°F)
• Color: Red

Applications

• Heavy Equipment & Construction Machinery
• Large-Diameter Bolts & Coarse-Threaded Fasteners
• Industrial Pumps, Compressors, and Motors
• Automotive and Heavy-Duty Vehicle Assembly
• Oil & Gas, Mining, and Aerospace Applications

Directions for Use

1. Ensure threads are clean, dry, and free of grease.
2. For through holes – Apply a bead across the contact length of the threads.
3. For blind holes – Apply several drops down the threads to the bottom of the hole.
4. Assemble and torque to the required specification.
5. Allow 10 minutes for handling strength and 24 hours for full cure.
6. For faster curing, use Permabond A905 or ASC10 Activator.

🔹 Note: This product is intended for permanent assembly—removal may require localized heating and mechanical force. Not recommended for plastic components or oxygen-rich systems.