Loctite 275 Threadlocker 50ml



Loctite 275 Threadlocker 50ml

  • Strength : High
  • Viscosity : Medium
  • Color : Green
  • Curing Type : Anaerobic
  • Application : Threadlocking

LOCTITE 275 is a green, high strength, high viscosity, thixotropic methacrylate-based threadlocking adhesive. It is ideal for applications where migration of the adhesive must be prevented. Can tolerate slight contamination of industrial oils. Suitable for large threads. Fluoresces to allow monitoring.

  • High viscosity
  • Breakaway torque on M10 bolts of 25Nm
  • Prevents unwanted movement, loosening, leaks and corrosion
  • Resists vibration
  • High strength
  • Suited to large threads

  • Brand: Loctite
  • Product Type: Threadlocker
  • Technology: Acrylic
  • Chemical Type: Dimethacrylate Ester
  • Appearance: Green liquid
  • Fluorescence: Positive Under UV Light
  • Viscosity: Medium
  • Cure: Anaerobic
  • Secondary Cure: Activator
  • Application: Threadlocking
  • Strength: High
  • Weight: 50 ml
275 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. Typical applications include the locking and sealing
of large bolts and studs (M25 and larger).

Cure Speed vs. Substrate

The rate of cure will depend on the substrate used. The graph
below shows the breakaway strength developed with time on
M10 black oxide nuts and bolts compared to different materials
and tested according to MIL-S-46163.
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 following graph shows shear strength developed with time
on steel pins and collars at different controlled gaps and tested
according to MIL-R-46082.
Cure Speed vs. Temperature

The rate of cure will depend on the temperature. The graph
below shows the breakaway strength developed with time at
different temperatures on M10 black oxide nuts and bolts and
tested according to MIL-S-46163.
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 below shows the breakaway strength
developed with time on M10 zinc dichromate steel nuts and
bolts using Activator 7471™ and 7649™ and tested according
to MIL-S-46163.
Torque Augmentation

Breakloose torque of an uncoated fastener will normally be 15
to 30% less than the on-torque. The effect of LOCTITE®
on the breakloose torque is shown in the graph below.

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
For safe handling information on this product, consult the
Material Safety Data Sheet (MSDS).
Where aqueous washing systems are used to clean the
surfaces before bonding, it is important to check for
compatibility of the washing solution with the adhesive. In
some cases these aqueous washes can affect the cure and
performance of the adhesive.
This product is not normally recommended for use on plastics
(particularly thermoplastic materials where stress cracking of
the plastic could result). Users are recommended to confirm
compatibility of the product with such substrates.
Directions for use:

For Assembly

  1. For best results, clean all surfaces (external and internal)
    with a LOCTITE®
    cleaning solvent and allow to dry.
  2. If the material is an inactive metal or the cure speed is too
    slow, spray all threads with and allow to dry.
  3. To prevent the product from clogging in the nozzle, do not
    allow the tip to touch metal surfaces during application.
  4. For Thru Holes, apply several drops of the product onto
    the bolt at the nut engagement area.
  5. For Blind Holes, apply several drops of the product down
    the internal threads to the bottom of the hole.
  6. For Sealing Applications, apply a 360° bead of product
    to the leading threads of the male fitting, leaving the first
    thread free. Force the material into the threads to
    thouroughly fill the voids. For bigger threads and voids,
    adjust product amount accordingly and apply a 360° bead
    of product on the female threads also.
  7. Assemble and tighten as required.

For Disassembly

  1. . Apply localized heat to nut or bolt to approximately 250
    °C. Disassemble while hot.

For Cleanup

  1. Cured product can be removed with a combination of
    soaking in a Loctite solvent and mechanical abrasion
    such as a wire brush.

Loctite Material Specification

LMS dated April-20, 1999. Test reports for each batch are
available for the indicated properties. LMS test reports include
selected QC test parameters considered appropriate to
specifications for customer use. Additionally, comprehensive
controls are in place to assure product quality and
consistency. Special customer specification requirements may
be coordinated through Henkel Quality.

Store product in the unopened container in a dry location.
Storage information may be indicated on the product container
Optimal Storage: 8 °C to 21 °C. Storage below 8 °C or
greater than 28 °C can adversely affect product properties.
Material removed from containers may be contaminated during
use. Do not return product to the original container. Henkel
Corporation cannot assume responsibility for product which
has been contaminated or stored under conditions other than
those previously indicated. If additional information is required,
please contact your local Technical Service Center or
Customer Service Representative.
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