Zhejiang Zhongrui Auto Parts, Your Trusted Source for Quality High Strength Automotive Fasteners, worldwide car parts factory
By Zhejiang Zhongrui Auto Parts Co., Ltd.
05/05/2025
At Zhejiang Zhongrui Auto Parts Co., Ltd., every fastener represents a promise of reliability, precision, and unwavering quality. Since our founding in 1986 in Jiaxing, China, our team has been dedicated to manufacturing the critical components that ensure vehicle integrity and performance. We are more than just a manufacturer; we are your partners in building vehicles you can trust, with a specialized focus on high strength automotive fasteners.
Our commitment to excellence is tangible within our 20,000 square meter plant, operating under the stringent guidelines of the IATF16949 certification. This isn't just a standard we adhere to; it's our operational philosophy, driving meticulous attention to detail from the moment raw materials enter our facility through the final automated inspection. This rigorous approach is how we consistently deliver quality automotive fasteners engineered to perform reliably in the most demanding conditions the road can offer.
We understand that the strength of a vehicle lies in the integrity of its connections. That's why our expertise in high strength fasteners is paramount. Our extensive product portfolio serves the diverse needs of the automotive industry, from the robust chassis to intricate engine assemblies.
Think about the fasteners that bear immense loads and withstand constant vibration. Our range includes dependable Automotive Bolts like Hex Head Bolts (compliant with standards such as ANSI/ASME B18.2.1, DIN 933, GB/T 5783) and versatile Hex Flange Bolts (DIN 6921, ISO 15072, GB/T 16674.2). These are the workhorses in areas like engine mounts, transmission connections, and frame assemblies. For more specific applications, we offer specialized bolts like Cup Head Square Neck Bolts (DIN 603) often chosen for their smooth finish and anti-rotation feature in seating or body panels, and crucial Passenger Car Wheel Bolts (ISO 7412, DIN 74361) ensuring your wheels stay securely attached.
Keeping those bolts tight are our Automotive Nuts. We manufacture standard Hex Nuts (DIN 934, ISO 4032) as well as sophisticated Lock Nuts designed to resist loosening under dynamic loads. Our Prevailing Torque Type Nuts, including Thin (DIN 985) and Thick (DIN 982) variants with non-metallic inserts, provide reliable anti-vibration performance. For all-metal locking solutions, our All-Metal Lock Nuts (ANSI/ASME B18.16.6, DIN 980M) offer robust security without inserts. We also provide Hexagon Flange Nuts (EN 1661) that integrate the function of a washer, simplifying assembly.
Proper load distribution and surface protection are vital, handled by our range of Automotive Washers. From standard Flat Washers (DIN 125, ISO 7089, GB/T 96) to those designed for shock absorption and axial load management like Spring Washers (DIN 127, GB/T 93) and high-strength Conical Spring Washers (DIN 6796). We also offer large format washers (DIN 9021) for distributing load over wider areas and specialized types like Square Bevel Washers (ASTM F436).
Precision alignment and secure pivoting are often achieved with Automotive Pins. Our offerings include highly accurate Parallel Pins (DIN EN ISO 8734, ISO 8735) used for precise component location, Clevis Pins with Head (DIN 1444, ISO 2341) essential for linkages in steering and suspension systems, and simple yet effective Split Pins (DIN 94, ISO 1234) providing a reliable mechanical lock for added safety.
Beyond these core types, we provide specialized Fasteners like robust U-Bolts (GB4231) for securing pipes and springs, heavy-duty Anchor Bolts (like the unique 7-shaped type) for anchoring machinery and structures, Double End Studs (GB899B, DIN939) for mounting components with threads on both ends, and precision Tooth Rods (ANSI/ASME B18.31.2) for specialized mechanical connections.
Keeping components axially in place is the job of Retaining Rings. Our range includes External Circlips (DIN 471, DIN 983) for shafts and Internal Retaining Rings for Bores (DIN 472, DIN 1308) for housings, ensuring assemblies remain intact even under dynamic forces.
We understand that common quality concerns like fracture, thread stripping, or material mixing can impact your production and reputation. Our dedicated quality problem-solving process is built on a foundation of transparency and collaboration – from identifying the root cause to implementing validated solutions hand-in-hand with our customers. This is how we ensure the reliability you expect from an IATF16949 certified manufacturer.
Our commitment to being your reliable China manufacturer extends globally. We proudly serve the major automotive markets in Europe (Germany, UK), North America (USA), and Asia (Japan), partnering with numerous renowned enterprises. We offer OE Service, develop custom fasteners based on your unique drawings, provide private branding options, and support your reach with our own export brand, RUIQI-Zhejiang Zhongrui Auto Parts.
The upcoming Ningbo International Auto Parts & Aftermarket Expo 2025 (CAPAFAIR Ningbo 2025) presents an ideal opportunity to connect with our team directly. As a key hub for global sourcing in the auto parts industry, this event brings together over 2,000 leading suppliers across 51,650 square meters, attracting thousands of Global Automotive Trade Professionals from around the world (including over 6,240 international buyers at the last edition).
Meet us at Booth H5-234 from August 13th to 15th, 2025, at the Ningbo International Conference & Exhibition Center. It's a chance to discuss your specific needs, explore our extensive range of high strength automotive fasteners, and discover the difference that dedicated quality and a trusted partnership can make to your supply chain.
Choosing the right partner for your fastening needs is a crucial decision. Let us show you the confidence that comes with sourcing reliability directly from the source. We look forward to welcoming you and exploring how we can help you build vehicles that stand the test of time and the road.
Coco Chen, Director of Business Development: coco.chen@zjzrap.com
Freddie Xiao, Account Manager: freddie.xiao@zjzrap.com
Brian Xu, Technical Sales Assistant: brian.xu@zjzrap.com
CAPAFAIR Ningbo 2025 Data Points for Buyers:
CAPAFAIR Ningbo 2025 is China's premier export-oriented auto parts and aftermarket trade show, leveraging the region's significant automotive industry cluster.
Our commitment to excellence is tangible within our 20,000 square meter plant, operating under the stringent guidelines of the IATF16949 certification. This isn't just a standard we adhere to; it's our operational philosophy, driving meticulous attention to detail from the moment raw materials enter our facility through the final automated inspection. This rigorous approach is how we consistently deliver quality automotive fasteners engineered to perform reliably in the most demanding conditions the road can offer.
We understand that the strength of a vehicle lies in the integrity of its connections. That's why our expertise in high strength fasteners is paramount. Our extensive product portfolio serves the diverse needs of the automotive industry, from the robust chassis to intricate engine assemblies.
Think about the fasteners that bear immense loads and withstand constant vibration. Our range includes dependable Automotive Bolts like Hex Head Bolts (compliant with standards such as ANSI/ASME B18.2.1, DIN 933, GB/T 5783) and versatile Hex Flange Bolts (DIN 6921, ISO 15072, GB/T 16674.2). These are the workhorses in areas like engine mounts, transmission connections, and frame assemblies. For more specific applications, we offer specialized bolts like Cup Head Square Neck Bolts (DIN 603) often chosen for their smooth finish and anti-rotation feature in seating or body panels, and crucial Passenger Car Wheel Bolts (ISO 7412, DIN 74361) ensuring your wheels stay securely attached.
Keeping those bolts tight are our Automotive Nuts. We manufacture standard Hex Nuts (DIN 934, ISO 4032) as well as sophisticated Lock Nuts designed to resist loosening under dynamic loads. Our Prevailing Torque Type Nuts, including Thin (DIN 985) and Thick (DIN 982) variants with non-metallic inserts, provide reliable anti-vibration performance. For all-metal locking solutions, our All-Metal Lock Nuts (ANSI/ASME B18.16.6, DIN 980M) offer robust security without inserts. We also provide Hexagon Flange Nuts (EN 1661) that integrate the function of a washer, simplifying assembly.
Proper load distribution and surface protection are vital, handled by our range of Automotive Washers. From standard Flat Washers (DIN 125, ISO 7089, GB/T 96) to those designed for shock absorption and axial load management like Spring Washers (DIN 127, GB/T 93) and high-strength Conical Spring Washers (DIN 6796). We also offer large format washers (DIN 9021) for distributing load over wider areas and specialized types like Square Bevel Washers (ASTM F436).
Precision alignment and secure pivoting are often achieved with Automotive Pins. Our offerings include highly accurate Parallel Pins (DIN EN ISO 8734, ISO 8735) used for precise component location, Clevis Pins with Head (DIN 1444, ISO 2341) essential for linkages in steering and suspension systems, and simple yet effective Split Pins (DIN 94, ISO 1234) providing a reliable mechanical lock for added safety.
Beyond these core types, we provide specialized Fasteners like robust U-Bolts (GB4231) for securing pipes and springs, heavy-duty Anchor Bolts (like the unique 7-shaped type) for anchoring machinery and structures, Double End Studs (GB899B, DIN939) for mounting components with threads on both ends, and precision Tooth Rods (ANSI/ASME B18.31.2) for specialized mechanical connections.
Keeping components axially in place is the job of Retaining Rings. Our range includes External Circlips (DIN 471, DIN 983) for shafts and Internal Retaining Rings for Bores (DIN 472, DIN 1308) for housings, ensuring assemblies remain intact even under dynamic forces.
We understand that common quality concerns like fracture, thread stripping, or material mixing can impact your production and reputation. Our dedicated quality problem-solving process is built on a foundation of transparency and collaboration – from identifying the root cause to implementing validated solutions hand-in-hand with our customers. This is how we ensure the reliability you expect from an IATF16949 certified manufacturer.
Our commitment to being your reliable China manufacturer extends globally. We proudly serve the major automotive markets in Europe (Germany, UK), North America (USA), and Asia (Japan), partnering with numerous renowned enterprises. We offer OE Service, develop custom fasteners based on your unique drawings, provide private branding options, and support your reach with our own export brand, RUIQI-Zhejiang Zhongrui Auto Parts.
The upcoming Ningbo International Auto Parts & Aftermarket Expo 2025 (CAPAFAIR Ningbo 2025) presents an ideal opportunity to connect with our team directly. As a key hub for global sourcing in the auto parts industry, this event brings together over 2,000 leading suppliers across 51,650 square meters, attracting thousands of Global Automotive Trade Professionals from around the world (including over 6,240 international buyers at the last edition).
Meet us at Booth H5-234 from August 13th to 15th, 2025, at the Ningbo International Conference & Exhibition Center. It's a chance to discuss your specific needs, explore our extensive range of high strength automotive fasteners, and discover the difference that dedicated quality and a trusted partnership can make to your supply chain.
Choosing the right partner for your fastening needs is a crucial decision. Let us show you the confidence that comes with sourcing reliability directly from the source. We look forward to welcoming you and exploring how we can help you build vehicles that stand the test of time and the road.
Coco Chen, Director of Business Development: coco.chen@zjzrap.com
Freddie Xiao, Account Manager: freddie.xiao@zjzrap.com
Brian Xu, Technical Sales Assistant: brian.xu@zjzrap.com
CAPAFAIR Ningbo 2025 Data Points for Buyers:
CAPAFAIR Ningbo 2025 is China's premier export-oriented auto parts and aftermarket trade show, leveraging the region's significant automotive industry cluster.
- Event Dates: August 13-15, 2025
- Venue: Ningbo International Conference & Exhibition Centre (Hall 1-8)
- Exhibition Scale: 51,650 m² with 2,400 booths
- Exhibitors: Over 2,000 leading automotive parts suppliers
- Target Audience: Specifically focused on Global Automotive Trade Professionals (Importers, Exporters, OEMs, Tier 1/2, Aftermarket).
- Previous Edition (Sept 2024): Attracted
About This Author
Zhejiang Zhongrui Auto Parts Co., Ltd.
Your Trusted IATF16949 Certified Automotive Fastener Manufacturer in China: Zhejiang Zhongrui Auto PartsZhejiang Zhongrui Auto Parts Co., Ltd., based at No. 680, Ya'ao Road, Daqiao Town, Nanhu District, Jiaxing City, Zhejiang Province, China, is a long-standing and trusted manufacturer specializing …
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05/05/2025 DIN928A Square Weld Nut Type A is a robust, purpose-built fastener engineered to deliver unmatched stability and strength in automotive welding applications. Designed with a square base and integrated weld projections, it ensures precise alignment and secure fusion during assembly, creating permanen... Read More »GB9457 A/B Grade Fine Pitch Type 1 Hexagonal Slotted Nuts
05/05/2025 GB9457 A/B Grade Fine Pitch Type 1 Automotive Hexagonal Slotted Nuts are precision-crafted fasteners designed to deliver superior performance in high-stakes automotive applications. Featuring a fine-pitch thread and slotted hexagonal design, these nuts combine precise adjustability with exceptional... Read More »GB6182 Type 2 Non-Metallic Insert Hexagonal Lock Nut
05/05/2025 GB6182 Type 2 Non-Metallic Insert Hexagonal Lock Nut is a premium fastening solution engineered to deliver unmatched reliability in automotive applications. Designed with a durable non-metallic insert, this hexagonal lock nut combines robust performance with vibration-resistant locking action, ensur... Read More »DIN980M End Face Two-Piece Metal Locking Nut
05/05/2025 DIN980M End Face Two-Piece Metal Locking Nut is a robust, precision-engineered fastener designed to meet the rigorous demands of automotive applications. Featuring a unique two-piece construction with an integrated end-face design, it delivers exceptional resistance to vibration and loosening, even... Read More »ANSI/ASME B18.16.6 Thick Hex Nylon Lock Nuts
05/05/2025 Designed to meet the rigorous demands of automotive applications, ANSI/ASME B18.16.6 Thick Hex Nylon Lock Nuts combine robust construction with advanced locking technology to ensure unmatched reliability in high-vibration environments. These heavy-duty fasteners feature a durable nylon insert that g... Read More »
05/05/2025 GB6175 2 Type Automotive Hexagon Nut is a versatile and robust fastening solution engineered to meet the rigorous demands of automotive assembly and maintenance. Designed to China’s GB standards, this nut features a reinforced hexagonal body and precision-machined threads, offering superior clampi... Read More »
05/05/2025 GB55 Hexagonal Thick Nut is a rugged, high-performance fastener designed to address the most demanding challenges in automotive engineering, offering superior strength and stability for critical vehicle systems. Its reinforced "thick" design provides an extended thread engagement length, significant... Read More »ANSI/ASME B18.16.6 American All-Metal Torque Type Hexagon Lock Nut
05/04/2025 The ANSI/ASME B18.16.6 American All-Metal Torque Type Automotive Hexagon Lock Nut is a premium fastening solution designed to excel in high-stakes automotive environments where reliability is non-negotiable. Engineered with an innovative all-metal torque-locking mechanism, it eliminates the risk of... Read More »GB6177.2 Fine Pitch Hexagonal Flange Nut Zhejiang Zhongrui Auto Parts Co., Ltd.
05/04/2025 The GB6177.2 Fine Pitch Hexagonal Flange Nut is a precision-engineered fastener tailored for the demanding requirements of automotive systems, combining reliability with advanced design. Featuring a fine-pitch thread profile, it delivers enhanced clamping precision and resistance to loosening in hig... Read More »ANSI/ASME B18.16.4 Hexagon Flange Nut Zhejiang Zhongrui Auto Parts Co., Ltd.
05/04/2025 The ANSI/ASME B18.16.4 Automotive Hexagon Flange Nut is a robust fastening solution engineered to meet the rigorous demands of automotive applications. Designed with a wide flange base, it distributes clamping force evenly across mating surfaces, minimizing the risk of loosening under vibration—a... Read More »7-Shaped Anchor Bolt Zhejiang Zhongrui Auto Parts Co., Ltd.
05/04/2025 The 7-Shaped Anchor Bolt, characterized by its angular bend resembling the numeral "7," is a heavy-duty fastener designed to embed securely into concrete or masonry. Widely utilized in automotive facilities, it anchors machinery, assembly line equipment, and structural supports to withstand high sta... Read More »GB4231 U-Bolt Zhejiang Zhongrui Auto Parts Co., Ltd.
05/04/2025 The GB4231 U-Bolt is a standardized fastener compliant with China's national specifications, engineered to secure cylindrical or tubular components in demanding environments. Widely used in automotive systems, such as heavy-duty truck chassis and commercial vehicle suspension systems, its U-shaped d... Read More »Passenger Car Wheel Bolts Zhejiang Zhongrui Auto Parts Co., Ltd.
05/04/2025 Passenger Car Wheel Boltss are used to securely attach the wheel to the vehicle's hub assembly. Bolts withstand dynamic loads, vibrations and harsh driving conditions, ensuring the structural integrity of the wheel-to-axle connection. In the automotive industry, wheel hub bolts are manufactured from... Read More »ANSI/ASME B18.5 Round Head Square Neck Bolt Zhejiang Zhongrui Auto Parts Co., Ltd.
05/04/2025 ANSI/ASME B18.5 Round Head Square Neck Bolts combining a smooth, rounded head with a square neck to prevent rotation during installation. This unique design ensures secure seating in square-shaped recesses or mating components, eliminating slippage even under extreme torque. Manufactured to ANSI/ASM... Read More »ANSI/ASME B18.2.1 Square Head Bolt Zhejiang Zhongrui Auto Parts Co., Ltd.
05/04/2025 ANSI/ASME B18.2.1 Square Head Bolts are standardized fasteners distinguished by their square-shaped heads, designed for applications requiring robust torque transmission and secure mechanical engagement. The square head geometry provides a larger contact surface for wrench or spanner tools, enabling... Read More »GB5785 Fine Pitch Hexagon Head Bolts Zhejiang Zhongrui Auto Parts Co., Ltd.
05/04/2025 GB5785 Fine Pitch Hexagon Head Bolts are precision-engineered fasteners featuring a hexagonal head and fine thread pitch, optimized for applications requiring high clamping force, vibration resistance, and dimensional accuracy. The fine pitch design (e.g., smaller thread spacing compared to standard... Read More »GB21 Small Hexagon Head Bolt Zhejiang Zhongrui Auto Parts Co., Ltd.
05/04/2025 GB21 small hexagon head bolts are standard fasteners used in automobile manufacturing, mechanical equipment, building structures and other fields. The bolts comply with the GB21 national standard and have excellent mechanical properties and reliable connection strength. Its small hexagon head design... Read More »ANSI/ASME B18.2.1 Hexagon Head Bolt Zhejiang Zhongrui Auto Parts Co., Ltd.
05/04/2025 ANSI/ASME B18.2.1 automotive hexagonal bolts comply with the American National Standards Institute (ANSI) and the American Society of Mechanical Engineers (ASME) B18.2.1 standard. The bolts are designed with a standard hexagonal head, have excellent mechanical properties and reliable locking capabil... Read More »ANSI/ASME B18.2.1 Hexagon Flange Bolt Zhejiang Zhongrui Auto Parts Co., Ltd.
05/04/2025 ANSI/ASME B18.2.1 automotive hexagonal flange bolts are designed with a hexagonal head and an integral flange to increase the bearing surface, reduce the compressive stress between the bolt and the connected parts, and improve the stability of the connection. The size range is from 1/4 inch to 6 inc... Read More »05/04/2025 For robust and reliable fastening in critical automotive structures, Heavy Series Hexagon Flange Bolts are indispensable. These bolts, designed for higher load applications, are standardized in China under GB 5789 - 1986 for Product Grade B. Navigating the landscape of international standards for th... Read More »Choosing the Right Automotive Pin Fasteners for Your Vehicle's Performance and Safety
05/04/2025 These small but mighty components are vital for connecting parts that experience both static and relative motion, such as in hinge mechanisms. But selecting the right automotive pin fasteners is a task that requires careful consideration, as these fasteners must withstand the stresses and forces the... Read More »05/04/2025 In the intricate design and manufacturing of modern vehicles, while attention often focuses on major components, the reliability and performance of countless smaller parts are equally critical. Precision fasteners, often unseen, are the linchpin of safety, durability, and efficient assembly.At Zheji... Read More »05/04/2025 In the demanding environment of automotive engineering, where vibration and precise assembly are constant considerations, selecting the correct fastener is critical. The Hexagon Head Full Thread Bolt with Fine Pitch Thread, standardized in China as GB/T 5785 - 2016 for Product Grades A and B, is a k... Read More »
05/04/2025 In demanding industrial and automotive applications, maintaining consistent clamping force and joint integrity is crucial, especially in high-strength bolted connections subjected to dynamic loads and vibrations. DIN 6796 Conical Spring Washers, also known as Clamping Washers or Spring Steel Washers... Read More »05/04/2025 Zhejiang Zhongrui Auto Parts Co., Ltd., a leading automotive fastener manufacturer based in Jiaxing City, Zhejiang Province, China (Est. 1986), is pleased to announce its participation in the Ningbo International Auto Parts & Aftermarket Expo 2025 (CAPAFAIR Ningbo 2025). The event, a key hub for... Read More »05/04/2025 Jiaxing, Zhejiang, China – Zhejiang Zhongrui Auto Parts Co., Ltd., a leading automotive fastener manufacturer with extensive expertise in high strength fasteners and custom fastening solutions, is proud to highlight its capabilities in producing high-quality custom automotive pins certified under... Read More »
05/04/2025 In the demanding environment of automotive manufacturing and assembly, selecting fastening components that offer high shear strength, flexibility, and ease of installation is crucial. Spring type straight pins and clamping sleeves, standardized under DIN 1481 (Heavy Duty | ISO 8752) and DIN 7346 (Li... Read More »
