Because washers are pre-assembled, they eliminate the need for manual assembly on the production line, significantly reducing labor costs and the risk of dropped or missing parts.
The standard specifies that the pan head's diameter and height are slightly smaller than a standard DIN or ISO pan head, making them ideal for compact electronics. Technical Benefits & Applications
Features both a helical split lock washer (for tension) and a flat washer (to protect the surface).
You can obtain the official, full-text technical documentation through several authorized standards distributors: JIS B1188 Double Washer Sems
Helical split lock washer, flat washer, or internal tooth washer