LOCTITE® 263

LOCTITE® 263™ 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 ® 263™ 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 ® 263™ 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.

Typical Properties of Uncured Material

Specific Gravity @ 23 °C1.1
Viscosity, Brookfield – RVT @ 25 °C, mPa·s (cP):
Spindle 2, speed 20 rpm
500
Viscosity, Cone & Plate, 25°C, mPa·s (cP):
Cone C60/1°Ti @ shear rate 129 s-1
450

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 cure speed is too slow, use appropriate activator. Please see the Cure Speed vs. Activator graph for reference. Allow the activator to dry when needed.
3. Shake the product thoroughly before use.
4. To prevent the product from clogging in the nozzle, do not allow the tip to touch metal surfaces during application.
5. For Thru Holes, apply several drops of the product onto the bolt at the nut engagement area.
6. For Blind Holes, apply several drops of the product to the lower third of the internal threads in the blind hole, or the bottom of the blind hole.
7. 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 thoroughly fill the voids.For bigger threads and voids, adjust product amount accordingly and apply a 360° bead of product on the female threads also.
8. Assemble and tighten as required.
For Disassembly
1. Apply localized heat to nut or bolt to approximately 250°C.Disassemble while hot.
Clean-up:
1. Cured product can be removed with a combination of soaking in a LOCTITE® solvent and mechanical abrasion such as a wire brush.

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