Jis B: 1188 Pdf

Helical split lock washer, flat washer, or internal tooth washer

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. jis b 1188 pdf

The standard defines the specifications for cross-recessed head screws with captive washers , commonly known in the industry as "Sems" screws. These specialized fasteners feature pre-assembled washers that are mounted onto the screw blank before the threads are rolled, ensuring the washers remain permanently attached and free-spinning. Core Specifications of JIS B 1188 Helical split lock washer, flat washer, or internal

Usually includes just a split lock washer or a flat washer. Core Specifications of JIS B 1188 Usually includes

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 types based on the washer assembly:

The helical split lock washer provides constant tension to prevent the screw from loosening under mechanical stress.