LOCTITE 263 is a high-strength threadlocker used by composite and equipment manufacturers to permanently secure bolted and threaded metal connections against vibration loosening. For FRP factories, pultrusion lines, and equipment assembly operations that need a robust, high-strength threadlocking solution with a lower application viscosity, LOCTITE 263 is formulated to cure reliably on metal threads.
Typical Properties of LOCTITE 263
Buyers evaluating this high-strength threadlocker for a new sourcing relationship should reference the physical properties listed below alongside the current Safety Data Sheet before specifying it into an assembly procedure.
| Property | Typical Value |
|---|---|
| Specific Gravity @ 23°C | 1.1 |
| Viscosity, Brookfield RVT @ 25°C (Spindle 2, 20 rpm) | 500 mPa·s |
| Viscosity, Cone & Plate @ 25°C (Cone C60/1°Ti @ 129 s⁻¹) | 450 mPa·s |
How LOCTITE 263 Is Applied for Assembly
For best results, all surfaces should be cleaned with a LOCTITE cleaning solvent and allowed to dry before application. If cure speed is too slow, an appropriate activator can be used and allowed to dry when needed. It should be shaken thoroughly before use, and the applicator tip should not touch metal surfaces during application to prevent clogging.
For thru holes, several drops are applied onto the bolt at the nut engagement area. For blind holes, several drops are applied to the lower third of the internal threads or the bottom of the hole. For sealing applications, a 360-degree bead is applied to the leading threads of the male fitting, leaving the first thread free, and the material is forced into the threads to fill voids; for bigger threads and voids, the amount is adjusted and a bead can also be applied to the female threads. Parts are then assembled and tightened as required.
Disassembly and Clean-Up
Because this threadlocker is high-strength, disassembly requires localized heat applied to the nut or bolt to approximately 250°C, with the connection disassembled while hot. Cured product residue can be removed by soaking in a LOCTITE solvent combined with mechanical abrasion, such as a wire brush.
Why Sourcing Consistency Matters
Inconsistent threadlocker viscosity or cure behavior can lead to loose fasteners, rework, or assembly line delays across FRP pipe and tank, pultrusion, and equipment manufacturing operations. Buyers who source this product through a documented supply chain reduce the risk of receiving mismatched batches with inconsistent viscosity or cure speed.
Where to Source LOCTITE 263
Composite material buyers and assembly manufacturers can source this threadlocker and related auxiliary agent products through Thousands Technology’s supply chain resource support, which helps FRP factories, boat builders, and pultrusion manufacturers maintain consistent access to recommended international brand products. For handling and safety classification references used across manufacturing operations, buyers can also review ASTM standards and publications.
Documentation
Before specifying this product into a production process, buyers should request the current Technical Data Sheet and Safety Data Sheet to confirm viscosity, cure speed, and handling requirements for their specific fastener sizes.
Frequently Asked Questions
What is LOCTITE 263 used for?
It is used as a high-strength threadlocker to permanently secure bolted and threaded metal connections against vibration loosening in assembly operations.
How does LOCTITE 263 compare to LOCTITE 262?
Both are high-strength threadlockers, but LOCTITE 263 has a lower application viscosity, making it easier to dispense into fine threads and smaller fastener sizes.
How is a threaded connection disassembled after using LOCTITE 263?
Because it is high strength, localized heat of approximately 250°C is applied to the fastener, and the connection is disassembled while hot.
Where can I get technical support for sourcing LOCTITE 263?
Buyers can request the current TDS and SDS and reach out through Thousands Technology’s supply chain resource support for sourcing guidance on LOCTITE 263 and related assembly products.
Ready to source LOCTITE 263 for your next assembly run? Contact our team to request documentation, discuss packaging options, and get supply chain resource support for your production schedule.
