M4 M5 M6 M8 M10 M12 M16 and M20 Black Plastic Dome Head Bolt Nut Protection Caps. Check the size chart below for correct ordering. Quantities available 5, 10, 20, 50, and 100, 500AND 1000 Pieces. Discount Available for Order Exceeding 5000 Pieces Please Enquire. Ideal for covering exposed Hex Head Fasteners such as Nuts Screws, Bolts offering a safe and professional finish. Also commonly known as nut protection caps, bolts caps and plastic caps. These caps fit standard sized metric fasteners. Dimensions: M4 CAPS – M4 Bolt & Nut Thread Size – Spanner Size: 7mm. M5 CAPS – M5 Bolt & Nut Thread Size – Spanner Size: 8mm. M6 CAPS – M6 Bolt & Nut Thread Size – Spanner Size: 10mm. M8 CAPS – M8 Bolt & Nut Thread Size – Spanner Size: 13mm. M10 CAPS – M10 Bolt & Nut Thread Size – Spanner Size: 17mm. M12 CAPS – M12 Bolt & Nut Thread Size – Spanner Size: 19mm. M16 CAPS – M12 Bolt & Nut Thread Size – Spanner Size: 24mm. M20 CAPS – M12 Bolt & Nut Thread Size – Spanner Size: 30mm. For Example if you want to order 10mm spanner size caps please select M6 Caps and so on if your not sure please message us and we will be more then happy to assist – for further information please check the Dimension chart above. Right Product for Professional Job. Same day dispatch via first class post for orders received by 2pm Monday – Friday. These Black low density polyethylene (LDPE) Push fit. Protecting caps cover nuts and exposed screws, bolts and provide effective protection against damage and weathering and improve the finished appearance of your product….. Easy to fit and to remove. · Intended for Hexagon shaped Screws, Bolts & Nuts. · Improving the Finished Appearance of your Product. Provides a Neat Finish to Hex Head Fasteners. · Protect Fasteners Against Weather & Tampering. · Enhance Finish of Fasteners. · Easy to fit and to remove. Injection Moulded Dome Head Hex protection caps. For domestic and commercial. Please check the image for sizes. Polyethylene Low Density LDPE.