Loctite 262 Medium to High Strength Threadlocker 50ml
Available
Loctite 262 is a one-component, red, medium to high strength anaerobic threadlocker (dimethacrylate ester). Henkel designs it for the permanent locking and sealing of threaded fasteners.
Henkel lists large bolts and studs up to M25 as the typical use. It is a thixotropic liquid that cures without air between close-fitting metal surfaces, and it fluoresces under UV light so the applied product can be inspected.
Where this product is used
- Permanent locking and sealing of large bolts and studs up to M25
- Threaded fasteners that are not meant for routine removal
- Threads that must be sealed against leakage as well as locked
- Fasteners in contact with motor oil or 50/50 water/glycol, using the retained-strength data in the Henkel data sheet
- Assemblies where the applied product is checked under UV light
Features
- Medium to high strength, for permanent locking and sealing of threaded fasteners
- One component, no mixing
- Red liquid with positive fluorescence under UV light
- Medium viscosity, thixotropic, so it stays where it is applied
- Anaerobic cure, with an activator available as a secondary cure
- 22 N·m breakaway torque on M10 steel nuts and bolts (24 h at 22 °C)
- Removable with localised heat to about 250 °C
Key specifications
| Specification | Detail |
|---|---|
| Chemical type | Dimethacrylate ester (acrylic, anaerobic) |
| Colour | Red liquid, fluoresces under UV light |
| Strength class | Medium to high (Henkel TDS wording) |
| Viscosity (Brookfield RVT, 25 °C, spindle 3, 20 rpm) | 1,200 to 1,400 mPa·s |
| Specific gravity (25 °C) | 1.1 |
| Breakaway torque (M10 steel nuts and bolts, 24 h at 22 °C, ISO 10964) | 22 N·m |
| Prevail torque (M10 steel nuts and bolts, 24 h at 22 °C, ISO 10964) | 32 N·m |
| Compressive shear strength (steel pins and collars, 1 hour at 22 °C, ISO 10123) | At least 3 N/mm² |
| Compressive shear strength (steel pins and collars, 24 hours at 22 °C, ISO 10123) | At least 10 N/mm² |
| Thread size | Large bolts and studs up to M25 |
| Approvals | MIL-S-46163A (lots tested to requirements; Henkel states this is a regional approval); ASTM D5363 (North American lots tested to the stated requirements) |
| Storage | 8 °C to 21 °C, unopened container, dry location |
| Technical data sheet | Henkel TDS February-2022 |
Selecting the right option
For a medium strength grade see Loctite 243 Medium Strength Threadlocker. For a high strength grade see Loctite 263 High Strength Threadlocker or Loctite 271 High Strength Threadlocker 50ml.
For bolts and studs M25 and larger, Henkel's data sheets name that size range for Loctite 277 High Strength Threadlocker 50ml and Loctite 272 High Strength - High Temperature Threadlocker 50ml.
Using it
If the material is an inactive metal, or the cure is too slow, spray the threads with Loctite Activator SF 7471. The data sheet also names SF 7649.
To disassemble, apply localised heat to the nut or bolt to approximately 250 °C and remove while hot. This is a removal temperature, not an operating limit.
Cure speed depends on the materials, the gap and the temperature; the cure-speed graphs are in the Henkel data sheet. The data sheet gives no operating temperature range.
Storage and handling
Store unopened in a dry location. Henkel gives 8 °C to 21 °C as the optimal range. Storage below 8 °C or above 28 °C can adversely affect the properties of the product. Do not return used product to the container.
Limits and safety
Not recommended for pure oxygen or oxygen-rich systems, or as a sealant for chlorine or other strong oxidisers. Not normally recommended for plastics, as thermoplastics can stress-crack. Check compatibility with aqueous washing systems. Read the safety data sheet before use.
Frequently asked questions
What is the breakaway torque of Loctite 262?
On M10 steel nuts and bolts, cured 24 hours at 22 °C, Henkel gives 22 N·m breakaway and 32 N·m prevail torque (ISO 10964).
How do I remove a fastener locked with Loctite 262?
Apply localised heat to the nut or bolt to approximately 250 °C and disassemble while hot.
Does Loctite 262 need an activator?
If the material is an inactive metal or the cure speed is too slow, spray the threads with Loctite Activator SF 7471 to speed the cure.
How fast does Loctite 262 cure?
Henkel gives no fixture time in text. On steel pins and collars, compressive shear strength is at least 3 N/mm² after 1 hour and at least 10 N/mm² after 24 hours at 22 °C (ISO 10123).
What temperature can Loctite 262 handle?
The Henkel data sheet states no operating temperature range and shows hot strength as a graph only. Check the graph against your service temperature, or ask Henkel.
Does Loctite 262 carry any approvals?
The Henkel data sheet lists MIL-S-46163A (lots tested to requirements; Henkel states this is a regional approval) and ASTM D5363 (North American lots). For any other certificate, contact AIMS.
Related products
See also: Loctite 243 Medium Strength Threadlocker, Loctite 263 High Strength Threadlocker, Loctite 271 High Strength Threadlocker 50ml, Loctite 277 High Strength Threadlocker 50ml, Loctite 7471 Primer T Surface Preparation Activator Aerosol 133g.
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