LOCTITE 270/50ML – High Strength Threadlock

Loctite 270/50ml – High Strength Threadlock

Loctite 270 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 works on all metals, including passive substrates such as stainless steel, aluminium and plated surfaces. It is proven to be tolerant of minor contamination due to industrial oils, e.g. engine oils, corrosion prevention oils and cutting fluids. Can be disassembled by heating to 300

Loctite 270 is designed for the permanent locking and sealing of threaded fasteners. The product cures when confined in the absence of air between close fitting metal surfaces and prevents loosening and leakage from shock and vibration. Loctite 270 is particularly suited for heavy duty applications such as studs into motor housings, nuts onto studs in pump housings and other fasteners where high strength is required. Loctite 270 provides robust curing performance. It not only works on active metals (e.g. brass, copper) but also on passive substrates such as stainless steel and plated surfaces. The product offers high temperature performance and oil tolerance. It tolerates minor surface contaminations from various oils, such as cutting, lubrication, anti-corrosion and protection fluids.

Product Description

Technology: Acrylic
Chemical Type: Dimethacrylate ester
Appearance (uncured): Green liquid
Fluorescence: Positive under UV light
Components: One component: Requires no mixing
Viscosity: Low
Cure: Anaerobic
Secondary Cure: Activator
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 breakaway strength developed with time on M10 steel nuts and bolts. Compared to different materials and tested according to ISO 10964.

Cure Speed vs. Bond Gap
The rate of cure will depend on the bondline gap. Gaps in threaded fasteners depends on thread type, quality and size. The graph shown in the data sheet shows shear strength developed with time on steel pins and collars at different controlled gaps and tested according to ISO 10123.

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, 7649, 7088 and 7091 and tested according to ISO 10964.

Typical Properties of Uncured Material
Specific Gravity @ 25°C: 1.1
Viscosity, Brookfield – RVT, 25 °C, mPa·s (cP):
–Spindle 2, speed 20 rpm: 400 to 600
Viscosity, Cone & Plate, 25 °C, mPa·s (cP):
–Cone C60/1°Ti @ shear rate 129: 450

Typical Performance of Cured Material
Adhesive Properties:

Cured for 24 hours @ 22 °C
Breakaway Torque, ISO 10964, Unseated:
M10 steel nuts and bolts: N·m 33 (lb.in.) (290)
M6 steel nuts and bolts: N·m 5 (lb.in.) (45)
M16 steel nuts and bolts: N·m 90 (lb.in.) (800)

3/8 x 16 steel nuts (grade 2) and bolts (grade 5): N·m 31 (lb.in.) (275)

Prevail Torque @ 180°, ISO 10964, Unseated:
M10 steel nuts and bolts: N·m 33 (lb.in.) (290)
M6 steel nuts and bolts: N·m 3 (lb.in.) (26)
M16 steel nuts and bolts: N·m 125 (lb.in.) (1,100)

3/8 x 16 steel nuts (grade 2) and bolts (grade 5): N·m 33 (lb.in.) (290)

Breakloose Torque, ISO 10964, Pre-torqued to 5 N·m:
M10 steel nuts and bolts: N·m 39 (lb.in.) (345)

3/8 x 16 steel nuts (grade 2) and bolts (grade 5): N·m 35 (lb.in.) (310)

Prevail Torque @ 180°, ISO 10964, Pre-torqued to 5 N·m:
M10 steel nuts and bolts: N·m 25 (lb.in.) (220)
3/8 x 16 steel nuts (grade 2) and bolts (grade 5): N·m 31 (lb.in.) (275)

Compressive Shear Strength, ISO 10123:
Steel pins and collars: N/mm² ≥9.0 (psi) (≥1,305)

Cured for 1 week @ 22ºC,
Breakloose Torque, ISO 10964, Pre-torqued to 5 N·m:
M10 zinc phosphate nuts and bolts: N·m 46 (lb.in.) (400)
M10 stainless steel nuts and bolts: N·m 30 (lb.in.) (265)

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.