M520 KHHTMCZ50-
TR FASTENINGS M520 KHHTMCZ50- 凹头螺丝, BZP, 平/沉头六角, 钢制, 20 mm, M5, 50只
The is a M5 x 20mm metric flat/countersunk hex Socket Screw made of bright zinc-plated steel.
Newark:
# TR FASTENINGS M520 KHHTMCZ50- SCREW SOCKET, CSK, BZP, M5X20