Offers a wider surface area to distribute clamping pressure. 2. Washer Combinations
The authoritative, legal version of the complete document can be purchased directly from the Japanese Industrial Standards Committee (JISC) or through international clearinghouses like ANSI or IHS Markit.
The official full text is a copyrighted document. You can find technical summaries and purchase the official PDF through these sources: jis b 1188 pdf
These dimensions are critical for engineers ensuring proper fit and function in assemblies. It should be noted that different head shapes and washer combinations will have different dimensional specifications according to the standard.
If you only need the dimensional tables or a blueprint for modeling purposes (such as creating a CAD file): Offers a wider surface area to distribute clamping pressure
The JIS B 1188 PDF standard provides a comprehensive set of specifications for fasteners, ensuring their quality, reliability, and interchangeability. The standard covers a range of fastener types, materials, and applications, and is widely used in various industries. By understanding the requirements of JIS B 1188, manufacturers, engineers, and designers can ensure that their fasteners meet the necessary standards for performance, safety, and reliability.
: A pan head screw equipped with both a helical split lock washer (for vibration resistance) and a round flat washer (to protect the surface). The official full text is a copyrighted document
Defines the types of slotted screws covered (M1.4 to M10, with some extended ranges for pan head). It explicitly excludes self-tapping screws (JIS B 1122) and hexagon bolts.