These zinc-plated lock nuts from the RS PRO range are an effective alternative to Aerotight® fasteners. They're ideal for use in industrial, mechanical and railroad settings and are typically used by DIY motor enthusiasts, builders, roofers and joiners.

The M6 fastener is comprised of mild steel grade 8.8. The nylon insert tightens when the mating bolt is inserted. This enables it to withstand torque and vibrations. It also handles temperatures up to +250°C making it suitable for use in heat exchangers and is completely sealed, stopping any water, oil, solvents or gas leaking. As they're zinc-plated they are also resistant to rust and corrosion.

These tried-and-tested lock nuts conform to ASTM (American Society for Testing and Materials) standards DIN (Deutsches Institut für Normung, or the German Institute of Standardisation) 985, meaning they can withstand tension of up to 800 N/mm².

• M6 self-locking nut
• Nylon insert with 360° seal to prevent gas and fluid leakage
• Resistant to water, solvent, oil and other organic acids
• Zinc-plated to ensure corrosion resistance
• Made from mild steel of 8.8 grade
• Conforms to DIN 985 for high-tensile applications of up to 800 N/mm²

RS PRO is our own brand range and brings you a wide range of high-quality, great value products offering you more choice. Trusted by engineers all over the world, every part of every RS PRO product has been rigorously tested against demanding industry standards they’re only given the RS PRO Seal of Approval if we’re confident of their exceptional quality, which means you can be confident too.