Spanner Size: 30mm. 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 20|
These M20 domed nut caps, also known as bolt protection caps, 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 on to your nut or bolt heads, they are a tight fit and will remain in place.