Cordial Mart 20 Pack M12 Black Plastic Hex Nut Bolt Covers

• Precise M12 Size & 20-Piece Set – Includes 20 black domed hex nut and bolt covers, designed for M12 fasteners compatible with a 19mm spanner. Each cap measures 24 x 24 x 21.5mm. Please verify your fastener dimensions before purchase to ensure correct fit.
• High-Grade PE Plastic Build – Made from premium PE plastic with excellent toughness and dimensional stability. The material delivers strong resistance to corrosion, UV exposure, low temperatures and ageing, and will not deform easily under regular use.
• All-Round Fastener Protection – Forms a secure barrier against dust, moisture, rain and environmental debris, preventing rust and corrosion on exposed nuts and bolts to effectively extend their service life, while creating a neat, finished appearance.
• Tool-Free Quick Installation – Simple and convenient to fit and remove without any specialist tools. Just press the cap firmly over the hex nut for a snug, secure fit. Suitable for both professional trades and home DIY use.
• Wide Application Range – Ideal for use across machinery, pipework, valves, guardrails, construction and general DIY projects. Performs reliably in indoor, outdoor and damp environments, suitable for domestic and industrial settings alike.

Cordial Mart M12 Black Plastic Hex Nut and Bolt Covers deliver reliable protection and a clean, professional finish for exposed threaded fasteners. This practical 20-piece set is engineered for M12 hex nuts compatible with a 19mm spanner, suiting a broad range of domestic and industrial fastening applications. Constructed from high-quality PE plastic, these protective caps offer robust, long-lasting performance with excellent structural integrity. The material is formulated to resist corrosion, UV damage, low temperatures and gradual ageing, retaining its shape and performance even with prolonged outdoor exposure. With inherent good toughness, the caps withstand regular installation and handling without cracking or deformation. Each domed cap creates a sealed protective layer over installed nuts and bolts, blocking dust, dirt, rain and moisture from reaching the fastener surface. This protection inhibits rust and corrosion build-up, reduces maintenance needs and extends the working lifespan of your fixings. The uniform black finish and smooth dome shape also provide a tidy, polished look, covering raw metal fastener ends for a more cohesive overall installation. Installation is straightforward and requires no additional tools: simply align the cap over the hex nut and press firmly into place for a secure fit. The caps can also be removed easily when access to the fastener is required, making them suitable for both permanent and temporary protection purposes. These hex nut covers are suitable for use across multiple industries and settings, including machinery assembly, valve systems, gas and water pipework, bridge guardrails, railway infrastructure and general building works. They perform consistently in indoor, outdoor and damp environments, making them a versatile addition to any professional toolkit or home hardware collection. Each pack contains 20 identical black M12 hex nut and bolt protection caps, with dimensions of 24 x 24 x 21.5mm, designed for hex nuts suited to a 19mm spanner. Please check your fastener dimensions carefully before ordering to ensure correct compatibility.