10x Screw Grommets Expanding Nuts- M4 Screw & Fits into an 8mm Square Hole | eBay
Solid Brass Screw Back Eyelets with Washer Grommets Leather Craft Accessory for Bag Garment Shoe Clothes Jeans Decoration,10 x 5mm : Amazon.co.uk: DIY & Tools
10x Screw Grommets / Locknuts- For Trim Panels & Parts- Nissan 0128100111 | eBay
Jack Nut Fixings for PVC Frames from HandleStore.com