LOCTITE 263 is a high-strength red anaerobic threadlocker for permanent fastener retention on M6–M36 bolts — Multi Trade Combines stocks it at AT Road, Guwahati, price on request.
LOCTITE 263 is a high-strength, red anaerobic adhesive in Henkel's Threadlocker range. When applied to metal threads and the fastener is tightened, it cures in the confined, oxygen-free space between the bolt and nut, forming a rigid thermoset that resists vibration, shock loads, and chemical attack. The red colour immediately signals permanent retention — once cured, joints require significant heat or heavy impact to disassemble.
The product covers fasteners from M6 right up to M36, making it relevant for heavy structural bolting as well as close-tolerance machine assemblies. Cure time at room temperature is approximately 24 hours to full strength, with a handling strength typically achieved within 30–60 minutes on active metals.
Industries in Northeast India that specify LOCTITE 263 include borewell-drilling contractors who cannot afford a pump flange backing off mid-bore, bridge-fabrication workshops locking shear-connector studs, tea-estate machinery shops retaining gearbox fasteners through monsoon humidity cycles, and power-utility contractors locking transmission-tower bolt assemblies across Assam and Meghalaya.
LOCTITE 263 works best on clean, grease-free threads. On passive or plated metals such as zinc, cadmium, or stainless steel, apply Loctite SF 7649 or SF 7471 Primer first. For very large gaps — say, pipe-thread applications — a structural grade like Loctite 2760 or a pipe-thread sealant (Loctite 577) is the better choice, and Multi Trade Combines can advise accordingly.
Complement your Loctite supply with ESAB welding electrodes for fabrication work, or KARAM safety harnesses for elevated bolting tasks — all available from Multi Trade Combines, Guwahati.
| Brand | Loctite |
|---|---|
| Category | Adhesives & Sealants |
| Key specs | High-strength · red · permanent |
| Application | Permanent retention, M6–M36, heavy machinery, structural bolts |
| Strength grade | High — requires heat >250°C or impact wrench to remove |
| Standard cure time | 24 hours full strength; 30–60 min handling (active metals) |
| Availability | In stock — price on request |
Use LOCTITE 263 (red, high-strength) when bolts must never come loose under severe vibration, thermal shock, or heavy loads — think engine mounts, pump volutes, structural flanges. Choose 243 (blue, medium) when periodic maintenance access is needed. 263-locked joints require heat above 250°C or an impact wrench for disassembly.
Yes, but stainless steel (and other passive metals) may cure slowly. Apply a thin coat of Loctite Activator or Primer before threadlocking to achieve full cure strength within 15 minutes rather than the standard 24-hour cure time.