Universal Monster Closed End Lug Nut Caps (33007) by Wheel Mate®. Thread Size: M14 x 1.5. Quantity: 20 Pieces. Monster Lug caps are the perfect accessory for those that want to customize their Monster Lug set. Tailor the look perfectly to your vehicle by giving the Monster Lug a closed end look. Available in a variety of colors. For those that use OEM Studs, the Monster Lugs will engage the entire thread without the stud poking out the end. For those who don’t want to see that, Wheel Mate offers the Monster Lug Closed End Cap. The End Cap is designed for the top of the Monster Lug, it threads on using the included adapter tool for installation and a secure fit. The End Caps also feature the Monster Lug “Monster” logo and are available in Black, Blue, Gold, Chrome, Red, and Glow-in-the-Dark.