PB Fastener & Components Black Buffer Outer/Outer Threads - PB Fastener 100052, This Black Buffer Outer/Outer Thread M4 15 x 15mm from PB Fastener & Components has been manufactured with a natural rubber (NR) body material plus 2x external male, steel galvanised threads. PB Fastener 100052 Threaded Buffer Outer/Outer Thread M4 15 x 15mm - Black
