Superior Anti-Rotation Performance
The square body design provides four flat sides, creating stronger resistance against rotation compared with hexagonal nuts. It is ideal for applications where the nut needs to remain fixed during tightening.
JIS B 1163 Square Nuts with Single Chamfer
- Standard: JIS B1163
- Material: Stainless Steel
- Thread Size: M3-M24
- Surface Treatment: Plain, Zinc Plated
- Min Order: 5000pcs
- Sample: Free sample (after quote)
- Delivery time: 30 – 45 Days
Product Overview
Product Application
JIS B 1163 Square Nut is a Japanese Industrial Standard square nut featuring a single chamfered edge design.， are manufactured with a four-sided square body and one chamfered face, providing excellent resistance against turning during assembly. The square profile allows the nut to fit into slots, channels, and recessed structures where standard hex nuts cannot be effectively used.
Compared with conventional hex nuts, its square shape provides a larger bearing surface and improved anti-rotation performance, making it suitable for mechanical assemblies, structural fastening, and applications requiring stable positioning.
Draw
Specification
JIS B 1163 vs DIN 557 Square Nut – Key Differences
JIS B 1163 and DIN 557 are both square nuts, designed for applications requiring better anti-rotation performance than standard hex nuts. The main differences lie in the standard origin, dimensional requirements, and chamfer design.
Core Differences
1. Standard System
- JIS B 1163: Japanese Industrial Standard (JIS), mainly used in Japanese machinery and OEM applications.
- DIN 557: German Industrial Standard (DIN), widely adopted in European mechanical and industrial applications.
2. Chamfer Design
- JIS B 1163: Features a single chamfer on one side, providing a guided installation surface while maintaining a flat bearing face.
- DIN 557: Generally features a double-chamfer design, with chamfers on both sides for easier assembly and a more symmetrical appearance.
3. Application Focus
- JIS B 1163: Commonly used in Japanese equipment, automotive components, and applications requiring fixed positioning.
- DIN 557: Widely used in machinery, steel structures, and general industrial fastening systems in Europe.
4. Interchangeability
- Although both are square nuts with metric threads, JIS B 1163 and DIN 557 are not always directly interchangeable due to differences in:
- Width across flats
- Nut thickness
- Chamfer dimensions
- Tolerances
Product Advantages
Larger Bearing Surface
The wider contact area distributes clamping force more evenly, reducing surface pressure and improving connection stability.
Easy Positioning & Assembly
The single chamfered edge improves installation guidance while maintaining sufficient load-bearing thickness, making it suitable for embedded and confined assembly spaces.
Common Questions
What is JIS B 1163 square nut?
JIS B 1163 is a Japanese standard specifying steel square nuts with a single chamfered edge for general mechanical fastening applications.
What is the difference between JIS B 1163 and normal hex nuts?
The main difference is the shape. Square nuts provide better anti-rotation capability and larger bearing surfaces, while hex nuts are designed for universal wrench tightening.
Can JIS B 1163 square nuts replace DIN square nuts?
Replacement depends on dimensional requirements because different standards may have variations in width, thickness, and tolerance.
Can you provide customized JIS B 1163 wing nuts?
Yes. Customized materials, finishes, packaging, and OEM specifications can be provided according to customer requirements.
