Pb fastener zinc plated steel mf spacers m5 packs of 10 pb fastener s48050x20 these zinc plated steel mf spacers m5 x 20mm from pb fastener amp components are 20mm long hexagonal m5 tapped spacers manufactured to a high standard using galvanised steel and designed with a 1x 10mm external male thread and 1x 11mm internal female thread at each end these quality spacers fit a 8mm spanner opening and come supplied in packs of 10 pb fastener s48050x20 zinc plated steel mf spacers m5 x