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Manufacturer > Loctite

LOCTITE 242/250ML – Medium Strength Threadlock

Part Number: LOCTITE 242/250ML
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Loctite 242/250ml – Medium Strength Threadlock

Loctite 242 Medium strength, medium viscosity, general purpose threadlocker, Breakaway torque 11.5Nm

Loctite 242 is designed for the locking and sealing of threaded fasteners which require normal disassembly with standard hand tools. The product cures when confined in the absence of air between close fitting metal surfaces and prevents loosening and leakage from shock and vibration. Suitable for applications on less active substrates such as plated surfaces, where disassembly with hand tools is required for servicing. The thixotropic nature of Loctite 242 reduces the migration of liquid product after application to the substrate.

Product Description

Technology: Acrylic
Chemical Type: Dimethacrylate ester
Appearance (uncured): Blue liquid
Fluorescence: Positive under UV light
Components: One component: Requires no mixing
Viscosity: Medium, Thixotropic
Cure: Anaerobic
Secondary Cure: Activator
Application: Threadlocking
Strength: Medium

Typical Curing Performance

Cure Speed vs. Substrate
The rate of cure will depend on the substrate used. The graph shown in the data sheet shows the breakaway strength developed with time on M10 steel nuts and bolts compared to different materials and tested according to ISO 10964.

Cure Speed vs. Temperature
The rate of cure will depend on the temperature. The graph shown in the data sheet shows the breakaway strength developed with time at different temperatures on M10 steel nuts and bolts and tested according to ISO 10964.

Cure Speed vs. Activator
Where cure speed is unacceptably long, or large gaps are present, applying activator to the surface will improve cure speed. The graph shown in the data sheet shows the breakaway strength developed with time on M10 zinc dichromate steel nuts and bolts using Activator 7471 and 7649 and tested according to ISO 10964.

Typical Properties of Uncured Material
Specific Gravity @ 25°C: 1.0
Viscosity, Brookfield: RVF, 25°C, mPa·s (cP):
–Spindle 3, speed 20 rpm: ≥5,000
–Spindle 3, speed 20 rpm: 800 to 1600
Viscosity, Brookfield: RVT, 25 °C, mPa·s (cP):
–Spindle 3, speed 20 rpm: 900 to 1,400

Typical Performance of Cured Material
Adhesive Properties:

After 1 hour @ 22°C

Breakaway Torque, ISO 10964:
3/8 x 16 steel nuts (grade 2) and bolts (grade 5): N·m 5.6 to 17, (lb.in.) (50 to 150)

Prevail Torque, ISO 10964:
3/8 x 16 steel nuts (grade 2) and bolts (grade 5): N·m 1.7 to 6.8, (lb.in.) (15 to 60)

After 24 hours @ 22°C

Breakaway Torque, ISO 10964:
3/8 x 16 steel nuts (grade 2) and bolts (grade 5): N·m 7.9 to 17, (lb.in.) (70 to 150)
3/8 x 16 cadmium nuts and bolts: N·m 1.1 to 6.8, (lb.in.) (10 to 60)
3/8 x 16 zinc nuts and bolts: N·m 2.3 to 6.8, (lb.in.) (20 to 60)
M10 black oxide steel nuts and bolts: N·m *8 to 19, (lb.in.) (71 to 168)

Prevail Torque, ISO 10964:
3/8 x 16 steel nuts (grade 2) and bolts (grade 5): N·m 2.8 to 6.8, (lb.in.) (25 to 60)
3/8 x 16 cadmium nuts and bolts: N·m 0.5 to 4.5, (lb.in.) (4 to 40)
3/8 x 16 zinc nuts and bolts: N·m 1.1 to 4.5, (lb.in.) (10 to 40)

Storage
Please store this product in the unopened container in a dry location.
Further storage information may be indicated on the product container labeling.

Safety information
Use only in well-ventilated areas.
Gloves and safety glasses should be worn.
Prolonged or repeated skin contact should be avoided to minimise any risk of sensitisation.
Store in original containers at 8-21°C (46.4-69.8°F) and do not return residual materials to containers as contamination may
reduce the shelf life of the bulk product.

Not sure if this product is right for you?
If you are not sure if this product is right for your requirements, please contact our friendly sales team and they will be able to help you.

  • Pack sizes: 10ml
  • 50ml
  • 250ml
  • Service temperature range: -55°C - +150°C
  • Strength: Medium
  • Maximum thread size: Up to M36
  • Fixture time steel: 5 min.
  • Fixture time brass: 15 min.
  • Fixture time stainless steel: 20 min.
  • Breakaway torque M10 bolts: 11.5Nm

£137.28Each (exc VAT)

In Stock