ITEM NAME:6pcs M4 Rubber Well Nut Motorcycle Metric Windscreen Wellnuts BRASS NUTS Description: - Rubber nuts consist of a flanged neoprene rubber sleeve with a captive brass nut - Tightening a threaded screw into the brass nut expands the insert to secure the fixing - Vibration and shock resistant - dampens noise - Can be used in blind holes and tubes - Fits all M4 metric machine screws Specification: - Material: High Quality Rubber with Brass Nut - Size: Approx. 12.15 x 10.7 mm/0.48 x 0.42 inch - Thread: M4 - Color: Black Package Included: 6 Pieces Rubber Well Nuts.Thread: M4. - Rubber nuts consist of a flanged neoprene rubber sleeve with a captive brass nut. - Tightening a threaded screw into the brass nut expands the insert to secure the fixing. - Material: High Quality Rubber with Brass Nut.