Pb fastener zinc plated steel ff spacers m3 packs of 10 pb fastener s55530x20 these zinc plated steel ff spacers m3 x 20mm from pb fastener amp components are 20mm long hexagonal m3 tapped spacers manufactured to a high standard using galvanised steel and designed with 2x female threads these quality spacers fit a 55mm spanner opening and come supplied in packs of 10 pb fastener s55530x20 zinc plated steel ff spacers m3 x 20mm pack of 10