WHITE PLASTIC POZI SCREW COVERS. COUNTERSUNK POZI WOOD OR SELF TAPPING SCREWS.
eBay
Bike Crank Cover Screws M18/M20 Aluminum Alloy Bicycle Crank Arm Fixing Bolt MTB Crankset Crank Cover For Shimano Crank Bolt Cap
Aliexpress UK
You only need to pass the screw through the hole on the screw cap, tighten it, and close the cap. Hinged to aid cap retention during and after installation. It can be used safely both indoors and outdoors.
eBay
28.6mm Multicolor Bicycle Headset Top Cap MTB Road Bike Stem Cover with Screw Fork Head Tube Cover Ultralight Aluminium Alloy
Aliexpress UK
Made from polypropylene. Simply put the screw through the hole, screw into place and close the cap. One piece hinged design.
eBay
Bicycle Stem Top Cap Alluminum Alloy Road Mountain Bike Headset Cap Cover Screws Stem Spacers For 28.6mm MTB Fork Tube Cover
Aliexpress UK
Works with Pozi or Self Tapping Screws. Available in Beige, Black, Grey or White. Cap Height: 2mm. Suitable for size 6 or size 8 screws.
eBay
G92F Aluminum Alloy Top Stem Cover with Screw Bike Top Tube Cap Front Fork Top Stem Cover MTB Bikes Supplies
Aliexpress UK
Designed To Fit Screw Gauge (Imp.). 6 - 8 Gauge (G). Manufactured in Polypropylene. For use with countersunk screws. Gloss Finish. - A plastic washer (base), through which the screw is inserted. Designed To Fit Screw Ø (mm) 3.5 - 4.2mm.
eBay
Bike Crankset Plug Screw Dust-Proof Disc Cover Bicycle Colorful Aluminum Alloy Crank Cap Mountain Road Bike Dustproof Cover
Aliexpress UK
Last photo shows with and without covers. May also fit other make Sockets & Switches.
eBay
EVOSID MTB Bicycle Headset Top Cap 1-1/8 Road Bike Stem Cover Aluminium Alloy Ultralight Headset Cover With Screw For 28.6m Fork
Aliexpress UK
WHITE / BLACK / BEIGE PLASTIC HINGED SCREW CAPS These very handy hinged screw caps are used to cover those unsightly screws in furniture and kitchen cabinets. They are made to fit 6 - 8 Gauge screws. Easy to use - simply screw the screw through the hole, close and secure the lid! Dimensions detailed in the images may vary slightly. **PACK OF 100 CAPS**.
eBay
EVOSID Bike Stem Cover Aluminium Alloy Stem Top Cap Only 5.8g Ultra Light Headset Cover With Screw for 28.6mm Front Fork
Aliexpress UK
Hinged, for Easy Access to Screw. Suitable for No.10 or No.12 Screws. Cover Unslightly Screws. We will not tolerate any abuse and will end any correspondance. Larger orders (in excess of 2 kg) may be sent via other carriers.
eBay
Practical Crank Screw Surface Anodizing Fine Workmanship Bike Crank Cover Anti Rust Bike Crank Cover
Aliexpress UK