Using a standard Phillips screwdriver on a JIS B 1188 screw often leads to slipping, stripping, and damaged heads. Always ensure your assembly line utilizes dedicated (often marked with a single dot or cross on the tool head) when working with these fasteners. Applications of JIS B 1188 Fasteners
Features a slightly deeper head style with an undercut, ideal for electrical terminal connections.
Fastener manufacturers (e.g., Sunco, Yamashina, or global suppliers like Misumi) offer free, downloadable and CAD models that mirror the exact dimensions layout of JIS B 1188.
JIS B 1188 has undergone several revisions over the decades to adapt to new technologies, materials, and manufacturing techniques. The Japanese Industrial Standards system mandates a review within five years of confirmation, revision, or establishment to ensure continued relevance. The publication history of JIS B 1188 is as follows: jis b 1188 pdf
JIS B 1188 is a Japanese industry standard developed by the Japanese Standards Association (JSA). It covers —fasteners where a flat washer, spring lock washer, or a combination of both is permanently attached to the screw blank before the threads are rolled. Because the thread diameter is larger than the inner clearance of the washer, the washer cannot fall off. Key Benefits of JIS B 1188 Fasteners:
Either a single washer (flat or lock) or double washer configuration. Captive Design: The washer is held captive on the shank. JIS B 1188 Double Washer Sems Configuration
Often referred to as or double-washer screws , these specialized fasteners are designed for efficiency in assembly lines. For engineers, procurement officers, and quality control professionals looking for the specific dimensions, material requirements, and mechanical properties, finding a reliable JIS B 1188 PDF is essential. What is the JIS B 1188 Standard? Using a standard Phillips screwdriver on a JIS
Using JIS B 1188 PDF offers several benefits, including:
Using pre-assembled screw and washer combinations offers major manufacturing advantages:
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If you only need the dimensional tables or a blueprint for modeling purposes (such as creating a CAD file):
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The JIS B 1188 standard is widely used in various industries, including:
When looking for the , ensure you are looking for: JIS B 1188:2017 (Latest version). Cross-recessed head screws with captive washer .