M420 PSSTMCZ100-
TR FASTENINGS M420 PSSTMCZ100- 机械螺丝, M4, 20 mm, 亮锌, 钢, 一字盘头
The is a M4 x 20mm metric pan head slotted Machine Screw made of bright zinc-plated brass.
Newark:
# TR FASTENINGS M420 PSSTMCZ100- SCREW, SLT, PAN, STEEL, BZP, M4X20