These fasteners are staple components in the electronics, automotive, and appliance industries due to their reliability in high-vibration environments. Accessing the JIS B 1188 PDF
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 helical split lock washer provides constant tension to prevent the screw from loosening under mechanical stress. jis b 1188 pdf
JIS B 1188 is often categorized into specific types based on the washer assembly:
The standard covers both steel and brass screws intended for general-purpose applications. The most common configuration is a machine screw combined with one or two captive washers. Standard Specifications Material Carbon steel (Class 4.8), Stainless steel (A2), and Brass Head Type Pan Head (Small pan head is 5%–20% smaller than standard) Washer Types These fasteners are staple components in the electronics,
Helical split lock washer, flat washer, or internal tooth washer
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 JIS B 1188 is often categorized into specific
Usually includes just a split lock washer or a flat washer.
Typically M2 to M12, with M3, M4, M5, and M6 being most common Clear Zinc, Yellow Zinc, Black Zinc, and Nickel Plating Key Components & Variations