LOCTITE 268/19G – High Strength Threadlock (Stick)

Loctite 268/19G – High Strength Threadlock

LOCTITE 268 is a high-strength threadlocker for maximum efficacy in the securing and sealing of bolts, nuts and studs to prevent loosening due to vibration. The product serves to permanently lock assemblies which must not come loose. It is available in a stick format and easy and effective in overhead applications. The product works on all metals, including passive substrates such as stainless steel, aluminium and plated surfaces. It tolerates slight contamination by industrial oils, corrosion prevention oils and cutting fluids.

Loctite 268 is a high strength version of an anaerobic threadlocking material. It is supplied as a wax-like semi-solid, conveniently packaged in a self-feeding stick applicator. As with liquid anaerobic products, this material develops its cured properties in the absence of air when confined between close fitting metal surfaces. It achieves consistent strength and can be used on a variety of metal substrates. It is particularly well suited for applications where a liquid product may be too fluid to stay on a part or be difficult to apply. It stores easily and allows for direct contact to a threaded part during application to ensure even coverage.

Product Description

Technology: Acrylic
Chemical Type: Dimethacrylate ester
Appearance (uncured): Red, wax consistency
Appearance (form): Stick
Fluorescence: Positive under UV light
Components: One component: Requires no mixing
Cure: Anaerobic
Application: Threadlocking
Strength: High

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 breakloose strength developed with time on M10 black oxide steel bolts and mild steel nuts compared to different materials and tested according to ISO 10964. All samples pre-torqued to 5 N·m. Product applied to bolts only.

Cure Speed vs. Temperature
The rate of cure will depend on the temperature. The graph shown in the data sheet shows the breakloose strength developed with time at different temperatures on 3/8 x 16 degreased steel nuts & bolts and tested according to ISO 10964. All samples pre-torqued to 5 N·m. Product applied to bolts only.

Cure Speed vs. Activator
Where cure speed is unacceptably long due to large gaps, applying activator to the surface may improve cure speed. However, this can reduce ultimate strength of the bond and therefore testing is recommended to confirm effect. The graph shown in the data sheet shows the breakloose strength developed with time using Activator 7471 and 7649 on 3/8 x 16 zinc dichromate nuts and bolts and tested according to ISO 10964. All samples pre-torqued to 5 N·m. Product applied to bolts, activator to nuts.

Typical Properties of Uncured Material
Specific Gravity @°C: 1.03
Unworked Penetration, ISO 2137, 1/10 mm: 90 to 150
Melting Point, °C: >65

Typical Performance of Cured Material
Adhesive Properties:

Cured for 1 hour @ 25°C
Breakloose Torque, ISO 10964, Pre-torqued to 5 N·m:
3/8 x 16 steel nuts (grade 2) and bolts (grade 5) (degreased): N·m ≥8 (lb.in.) (≥71)

Cured for 4 hours @ 25 °C
Breakloose Torque, ISO 10964, Pre-torqued to 5 N·m:
3/8 x 16 stainless steel nuts and bolts (degreased): N·m ≥8 (lb.in.) (71)

Cured for 24 hours @ 22 °C
Breakaway Torque, ISO 10964, Unseated:
3/8 x 16 steel nuts (grade 2) and bolt (grade 5) (degreased): N·m 10 (lb.in.) (90)
M10 black oxide bolts and mild steel nuts (degreased): N·m 10 (lb.in.) (90)
3/8 x 16 stainless steel nuts and bolts (degreased): N·m 16 (lb.in.) (140)

Breakloose Torque, ISO 10964, Pre-torqued to 5 N·m:
3/8 x 16 steel nuts (grade 2) and bolts (grade 5) (degreased): N·m ≥17 (lb.in.) (≥150)
M10 black oxide steel nuts and bolts (degreased): N·m 40 (lb.in.) (355)
3/8 x 16 stainless steel nuts and bolts (degreased): N·m 23 (lb.in.) (205)

Cured for 168 hours @ 22 °C
Breakaway Torque, ISO 10964, Unseated,
Oil Tolerance: M10 black oxide steel bolts and mild steel nuts degreased and then reoiled in noted oil type. Data presented as a % of unoiled control.

Emulsion Oil: Aquasafe 21: 66
Solvent-Based oil: SafeCoat DW 30X: 95
Hydrophobic Oil: ELF Evolution SXR 5W-30: 58

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

General information
This product is not recommended for use in pure oxygen and/or oxygen rich systems and should not be selected as a sealant for chlorine or other strong oxidizing materials.

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.