Spanner Size: 7mm. Available in Black, White or Grey .
F1=Width-Ø, T=Total height, A=Height, H=Inner height, M=Thread size, F=Nut / Spanner width
|M :||M 4|
These M4 domed nut caps, also known as bolt protection caps, or thread protectors are used to cover and protect nuts & bolts from weather and give a clean finish to your job. Just push or knock them onto your nut or bolt heads. they are a tight fit and will remain in place.