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You know that sharp screw end sticking out of a metal bracket? Or the open bolt on machinery that snags your sleeve every time? These silicone end blanking protective covers are the fix. Just push them onto any exposed screw thread or stud – they stretch to fit snug, then seal it off. Made from heat‑resistant silicone that handles up to 280°C, so they work fine near motors, heaters, or in hot industrial settings. Great for covering raw threads on furniture assemblies, protecting electrical terminals, or just making a workshop safer. White color comes in sizes from tiny M0.5 up to M56.
Elastic silicone material – Stretches over metric threads from M0.5 to M56. One cover fits a range of screw diameters, no need to guess.
Round sleeve design – Fully encloses the end of a bolt or stud. Protects against accidental contact, corrosion, and dirt buildup.
High temperature resistance – Rated for up to 280°C (536°F). Won't melt or degrade on hot engine components, ovens, or industrial equipment.
Insulated electrical protection – Silicone acts as a dielectric barrier, making these perfect for covering live terminals or grounding studs in control panels.
Soft & non‑scratch – Won't mar finished surfaces. Ideal for covering threads on delicate furniture or painted metal assemblies.
Easy on, easy off – No tools required. Push on by hand; pull off when you need access. Reusable many times without losing grip.
| Brand | Goobetter |
|---|---|
| Material | 100% Silicone (elastic, non‑toxic) |
| Available Sizes | M0.5, M1, M1.2, M1.4, M1.6, M2, M2.5, M3, M4, M5, M6, M8, M10, M12, M14, M16, M18, M20, M22, M24, M27, M30, M33, M36, M39, M42, M45, M48, M52, M56 (metric thread diameters) |
| Color (as sold) | White |
| Alternative Colors | Contact customer service – other colors available on request |
| Temperature Resistance | Up to 280°C (536°F) |
| Head Style | Round Head – tapered end covers bolt tip completely |
| Drive Style | One‑Way (press‑fit, no internal drive required) |
| End Type | Open base, closed round tip |
| System of Measurement | Metric |
Match the cover size to the nominal thread diameter of your bolt. For example, an M6 bolt uses an M6 cover. The silicone stretches slightly, so a cover can fit threads up to about 0.5mm larger in diameter, but best results come from exact or slightly undersized matches. If in doubt, go one size smaller – the elasticity handles it.
Yes – the silicone material is rated for continuous exposure up to 280°C. That's well above what most engines, industrial ovens, or heating elements reach on exterior surfaces. They won't melt, drip, or become brittle. For short spikes above 300°C, test in a non‑critical area first, but for most applications they're perfectly safe.
Absolutely. Silicone is an excellent dielectric insulator. These covers are commonly used to cap off unused terminal studs, live wire ends, or grounding lugs in control cabinets and junction boxes. They provide a physical barrier against accidental contact. Just ensure the cover fully encloses the conductive part and isn't forced over sharp edges that could cut the silicone.
Yes – they're soft and durable. After months or years of use, simply pull them off, wash with mild soap and water, let dry, and push back on. Silicone doesn't degrade from UV or most common solvents (though avoid strong acids or fuel immersion). Many customers reuse the same set across multiple projects.
This listing is for white covers only. However, we do have other colors available (black, red, blue, yellow, green) for most sizes M3 through M20. Contact our customer service with your size and color request, and we'll create a custom listing or check if we have stock. Minimum quantities may apply for small sizes.
