Fastener Expo Shanghai 2026--What Are the Functions of Washers and Retaining Rings?Fastener Applications and Functional Analysis

Fastener Expo Shanghai 2026 will take place across Hall 1.1, Hall 2.1, and Hall 3 of the National Exhibition and Convention Center (Shanghai). The exhibition is jointly organized by Shanghai Ebseek Exhibition Co., Ltd. AndLuosi.com, with support from the Fastener Subcommittee of the China Chamber of Commerce of Metals, Minerals & Chemicals Importers & Exporters. Covering a total area of 70,000 square meters, the event is expected to bring together over 1,400 companies and attract more than 25,000 professional visitors.

Compared with other similar exhibitions, Fastener Expo Shanghai 2026 does not rely solely on scale to build its competitive edge. Instead, it emphasizes professional depth through a complete industrial chain structure. The exhibition covers the full spectrum from raw materials and finished fasteners to equipment, molds, testing, and end-use applications. In particular, the finished fastener segment showcases standard parts, high-strength fasteners, stainless steel fasteners, and various customized non-standard components, forming a highly concentrated product matrix. This finished-product-oriented structure establishes its distinct positioning as the “No.1 Exhibition for Finished Fasteners.”

At the same time, Fastener Expo Shanghai 2026 will continue to highlight its brand positioning as a “truly effective fastener trade show,” featuring systematic displays across multiple segments, including finished fasteners, cold heading processes, tooling consumables, testing and packaging, surface treatment, raw material supply, and customized solutions. This enables visitors to complete the entire decision-making process—from selection to procurement—on a single platform.

What Are Washers and Retaining Rings Really Used For?Not Accessories, but Critical Components

Within the fastener system, washers and retaining rings are often regarded as “auxiliary parts.” However, from an engineering perspective, they perform critical functions. Washers are mainly used to distribute load, protect contact surfaces, and enhance joint stability, while retaining rings are used for axial positioning to prevent component displacement or detachment.

In practical applications, the absence of washers may lead to uneven transmission of bolt preload, resulting in surface damage or even structural failure. Without retaining rings, rotating components may experience axial movement, affecting operational stability. Although simple in structure, these components play irreplaceable roles in mechanical systems.

As engineering environments become more complex, the functions of washers and retaining rings continue to evolve. For example, in high-vibration environments, spring washers and locking washers significantly improve anti-loosening performance. In high-precision equipment, the dimensional stability of retaining rings directly affects assembly accuracy. These developments demonstrate that washers and retaining rings have evolved from basic components into essential elements of high-performance fastening systems.

Product Types and Structural Evolution: From Basic Components to Specialized Categories

From a structural perspective, washers include flat washers, spring washers, locking washers, and specialized functional washers. Flat washers distribute load and protect surfaces; spring washers provide additional preload through elastic deformation; locking washers achieve anti-loosening through structural design.

Retaining rings are mainly divided into external (shaft) retaining rings and internal (bore) retaining rings, used for axial positioning and internal fixation respectively. In precision equipment, they are further classified into high-precision and fatigue-resistant retaining rings to meet long-term operational requirements.

This increasing product segmentation will be clearly reflected at Fastener Expo Shanghai 2026, where companies such as Ningguo Dongbo, Handan Xingluo, Anhui Pines, Guangdong Sitelo, Wenzhou Zongheng, Handan Shuangzheng, Jiangxi Kaixu, Jiashan Hengye, and Lishui Chaotai will showcase a wide range of washers, retaining rings, and anti-loosening systems. Through concentrated displays of diverse product types, visitors can systematically understand the application logic of segmented fastener products.

Real Application Scenarios in Construction and Equipment Industries

In construction engineering, washers are widely used in steel structure connection nodes to distribute pressure, prevent surface damage, and improve joint stability. In bridges and large infrastructure projects, locking washers are commonly applied to mitigate loosening risks caused by long-term vibration.

In mechanical equipment, retaining rings play an even more critical role. Whether in bearing systems or transmission structures, they are used to restrict axial movement of components, ensuring stable operation. In industries such as automotive, wind power, and construction machinery, the reliability of retaining rings directly impacts the lifespan of the entire system.

Industry data shows that in high-vibration and complex working conditions, proper use of washers and retaining rings can significantly reduce connection failure rates. This has driven increasing demand in high-end manufacturing and encouraged continuous improvements in product precision and consistency.

Upgraded Anti-Loosening Technology, National High-End Fastener Anti-Loosening Technology Forum

In addition to product displays, Fastener Expo Shanghai 2026 will strengthen technical exchange through high-level forums. The National High-End Fastener Anti-Loosening Technology Forum will enter its fifth edition in 2026, continuing collaboration with national testing institutions.

The forum will invite nearly 100 major OEMs from sectors such as wind power, railway, and construction machinery, along with universities, research institutes, and anti-loosening fastener enterprises. Through performance testing, thematic discussions, and product evaluations, the forum will systematically assess anti-loosening products in terms of performance, installation convenience, and reusability.

This “testing + forum + evaluation” model provides reliable data for the industry and practical guidance for engineering applications, while promoting the standardization and industrialization of anti-loosening technologies.

Why More Companies Are Exhibiting: Because It Is “Truly Effective”

Feedback from exhibitors shows that the value of the exhibition continues to grow. Mr. Zhou from Anhui Ningguo Dongbo Fastener Co., Ltd. noted when reviewing the 2025 edition that the exhibition scale expanded significantly, with more exhibitors and improved visitor traffic, resulting in a highly satisfactory experience.

This is not an isolated case but the result of continuous structural optimization. On one hand, the exhibition has increased the scale of finished product halls, enhancing product concentration. On the other hand, it has introduced more end-user companies, enabling direct connections between supply and demand. This “real display + real demand” model creates a strong differentiated advantage.

Growing Global Buyer Presence and Stronger International Trade Attributes

Another highlight of Fastener Expo Shanghai 2026 is its increasing internationalization. The event is expected to attract distributors and traders from China, Southeast Asia, Europe, the Americas, India, the Middle East, South Korea, Japan, and Russia.

This global buyer structure allows exhibitors to expand both domestic and international markets, directly connecting with overseas demand and increasing business opportunities. At the same time, varying regional procurement needs will further drive product optimization.

Discover Real Applications and Procurement Trends On-Site

Starting from the niche segment of washers and retaining rings, it is clear that the fastener industry is moving toward greater specialization and higher performance. Fastener Expo Shanghai 2026 builds a complete ecosystem from products and applications to technical validation through comprehensive displays, exhibitor diversity, and technical forums.

Compared with other exhibitions, it not only offers scale advantages but also establishes its core positioning as the “No.1 Exhibition for Finished Fasteners” through its strong finished-product display capability. As one of the earliest and longest-running industry events, it also enjoys high credibility and stability.

For companies seeking to systematically understand product structures, identify quality suppliers, and grasp industry trends, Fastener Expo Shanghai 2026 is more than just an exhibition—it is a professional platform for comparing manufacturing capabilities, verifying product quality, and making informed decisions. This “visible, comparable, and reliable” value is exactly what continues to attract industry professionals year after year.

Data Sources

Fastener Subcommittee of China Chamber of Commerce of Metals, Minerals & Chemicals Importers & Exporters

Huajing Industry Research Institute, 2024–2025 Fastener Industry Development Report

Exhibition info: 

Fastener Expo Shanghai 2026

Date: June 24–26, 2026

Venue: National Exhibition and Convention Center (Shanghai)

Scale: 70,000㎡, 1,400+ exhibitors, 25,000+ professional visitors

Official Website: www.fastenerexpo.cn/en

Media Contact: Goblic Hu

Email: goblic.hu@ebseek.com

Tel: +86-21-6386 5973