M820 SOHTCSZ50-

TR FASTENINGS  M820 SOHTCSZ50-  凹头螺丝, 带帽, BZP, 六角, 钢制, 20 mm, M8, 50只

The is a M8 x 20mm metric hex socket head Cap Screw made of bright zinc-plated steel.

Newark:
# TR FASTENINGS  M820 SOHTCSZ50-  SCREW SOCKET, CAP, BZP, M8X20