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You’ve just dialed in the perfect fit on your bike’s stem, handlebar clamp, or brake levers – but those exposed hex bolts collect dirt, catch moisture, and just don’t look finished. Snap on these plastic hexagon head screw caps. They fit M5 and M6 socket head screws perfectly, covering the inner hex slot to keep out dust, mud, and grime. Each set comes with 10 caps in your choice of white, red, green, blue, or black. The slotted design lets you install them in seconds – no tools needed. Whether you’re protecting hardware on a mountain bike, road bike, or e-bike, these caps add a clean, professional touch while preventing corrosion and debris buildup.
| Parameter | Details |
|---|---|
| Product name | Hexagon Socket Screw Cap / Hex Head Screw Cover |
| Material | Plastic |
| Screw sizes compatible | M5, M6 (metric) |
| Head style | Hex head / socket head |
| Drive style | Slotted (for cap removal) |
| Colors available | White, Red, Green, Blue, Black |
| Quantity per pack | 10 pieces |
| System of measurement | Metric |
| Typical applications | Bicycle stem, handlebar clamps, brake levers, derailleur bolts, dust‑proof protection |
1. Will these caps fit both M5 and M6 screws? Do they have different sizes in the same pack?
Each pack contains caps that fit one size – either M5 or M6. When you order, select which screw size you need. The caps are not mixed. M5 caps are slightly smaller than M6 caps. Make sure to check your bike’s bolt size before ordering (most stem bolts are M5, some are M6).
2. Are these caps just decorative, or do they actually protect against rust?
Both – they add a clean look, but their main function is to seal the hex socket from rain, sweat, and mud. Moisture inside a hex bolt can cause rust over time. These caps create a barrier, so the steel bolts stay dry. They also prevent dirt from packing into the hex hole, which can strip the wrench interface.
3. How do I install them? Will they fall off on rough trails?
Installation is simple: just press the cap onto the screw head until it clicks or sits flush. The plastic has a slight interference fit. For normal road and mountain biking, they stay put. However, if you use a pressure washer or hit them directly with a hard stream, they may pop off. You can add a tiny drop of silicone adhesive for permanent fit, but most riders find the friction fit sufficient.
4. Can I still use a hex wrench after the cap is installed?
No – the cap covers the hex opening. To adjust the screw, you must first remove the cap. Use a small flathead screwdriver or a knife tip to pry it off. The caps are reusable as long as you don’t damage them during removal.
5. Will these caps fit screws on other things besides bicycles (e.g., furniture, electronics)?
Yes – they work on any M5 or M6 hex socket head screw, regardless of application. You can use them on furniture assembly, exercise equipment, motorcycle accessories, or tool handles. Just match the screw size (M5 or M6) and the cap will fit.
6. What if I need more than 10 caps – do you sell larger packs?
Currently we offer 10‑piece sets. If you need more, simply order multiple sets. For bulk quantities, contact customer service – we can arrange larger packs or wholesale pricing.
