More Than a Supplier — Your Reliable Bearing Partner.
More Than a Supplier — Your Reliable Bearing Partner.
The FKB Series combines a precision-machined bolt body with an integrated spring mechanism, allowing fast assembly and removal without complicated tools. This design makes the Folding Spring Bolt an ideal solution for clevis connections, mechanical joints, agricultural equipment and industrial machinery applications.
With durable material options and customized production capabilities, Gonuo supplies standard and OEM Quick Release Spring Bolt solutions according to different application requirements.
The FKB Folding Spring Bolt is a high-performance Quick Release Spring Bolt designed for fast, secure, and tool-free mechanical connections. As a professional China Fastener Manufacturer, Gonuo provides reliable fastening solutions for industrial machinery, automation equipment, construction machinery, and mechanical linkage systems.
The FKB Series features a spring-loaded locking mechanism that allows quick installation and removal while maintaining a stable connection. This innovative Spring Loaded Bolt design is specially developed for U-type clevis applications, providing excellent anti-loose performance and convenient maintenance.
Manufactured from high-strength spring steel with a zinc plated surface treatment, the Zinc Plated Spring Bolt offers excellent corrosion resistance and durability. Stainless steel options are also available for customers requiring enhanced environmental protection.
The precise dimensions of the FKB Series ensure perfect matching with corresponding clevis components, making it an ideal Clevis Pin Bolt and Clevis Fastener solution for applications requiring frequent assembly and disassembly.
Core Advantages
1. Tool-free quick installation and removal with reliable spring locking structure
2. High-strength spring steel construction for excellent fatigue resistance
3. Zinc plated surface treatment for improved corrosion protection
4. Stainless Steel Folding Spring Bolt options available for special environments
5. Precise matching with U-type clevises for stable mechanical connections
6. Suitable for Mechanical Linkage Bolt applications requiring repeated operation
The FKB Series Folding Spring Bolt is manufactured with precise dimensions to ensure reliable compatibility with U-type clevises and mechanical linkage systems. Different sizes are available to meet various industrial fastening requirements.
As a professional Industrial Fastener Manufacturer, Gonuo provides standard and customized Spring Loaded Bolt solutions with stable quality and flexible production capability.
| Number | Suitable for clevises | Dimensions | g Weight | ||||||
| d₁ h11 | g | a | b | L₁ ≈ | L₂ ≈ | L₃ ≈ | |||
| FKB 4×8 | G 4×8 | 4 | 8 | 9.5 | 11 | 19 | 15 | 4.5 | 15 |
| FKB 5×10 | G 5×10 | 5 | 10 | 12 | 13.5 | 23 | 19 | 5.5 | 25 |
| FKB 5×20 | G 5×20 | 5 | 20 | 12 | 13.5 | 33 | 29 | 5.5 | 31 |
| FKB 6×12 | G 6×12 | 6 | 12 | 14 | 16 | 28 | 23 | 6.5 | 46 |
| FKB 6×24 | G 6×24 | 6 | 24 | 14 | 16 | 40 | 35 | 6.5 | 52 |
| FKB 8×16 | G 8×16 | 8 | 16 | 19 | 21.5 | 37 | 30 | 8 | 106 |
| FKB 8×32 | G 8×32 | 8 | 32 | 19 | 21.5 | 52 | 46 | 8 | 116 |
| FKB 10×20 | G 10×20 | 10 | 20 | 23 | 26 | 46 | 38 | 10 | 194 |
| FKB 10×40 | G 10×40 | 10 | 40 | 23 | 26 | 66 | 58 | 10 | 205 |
| FKB 12×24 | G 12×24 | 12 | 24 | 28 | 31 | 53 | 45 | 12 | 331 |
| FKB 12×48 | G 12×48 | 12 | 48 | 28 | 31 | 78 | 69 | 12 | 350 |
| FKB 14×28 | G 14×28 | 14 | 28 | 31 | 34 | 62 | 52 | 14 | 472 |
| FKB 14×56 | G 14×56 | 14 | 56 | 31 | 34 | 92 | 82 | 14 | 508 |
| FKB 16×32 | G 16×32 | 16 | 32 | 36 | 39 | 73 | 62 | 16 | 694 |
| FKB 16×64 | G 16×64 | 16 | 64 | 36 | 39 | 103 | 92 | 16 | 744 |
| FKB 20×40 | G 20×40 | 20 | 40 | 45 | 50 | 87.5 | 71.5 | 16 | 1300 |
Industrial Automation:The FKB Folding Spring Bolt is widely used in automated equipment, assembly machines and production lines where quick positioning and repeated component removal are required.
Construction Machinery:As a reliable Clevis Pin Bolt, the FKB Series provides secure connections for linkage assemblies, support structures and movable mechanical components.
Material Handling Equipment:The Quick Release Spring Bolt offers convenient fastening solutions for conveyors, lifting platforms and handling systems requiring frequent adjustment.
Agricultural Machinery:The FKB Series is applied in tractors, agricultural implements and off-highway equipment as a durable Mechanical Linkage Bolt.
Hydraulic & Pneumatic Equipment:The Spring Loaded Bolt provides secure connections for adjustable mechanisms, cylinder mounting structures and industrial linkage components.
When you choose Gonuo, you work with an experienced Industrial Fastener Manufacturer providing reliable fastening components, customized solutions and stable global supply.
Gonuo specializes in manufacturing industrial fastening components including Folding Spring Bolt, Clevis Fastener and mechanical linkage parts. Our integrated production system ensures stable quality and reliable delivery for global customers.
As an integrated industry-and-trade manufacturer, we control the entire supply chain — from raw material sourcing to final assembly. This ensures unmatched batch-to-batch consistency, eliminates quality risks, and guarantees stable production for every order.
Need specific thread lengths, enhanced corrosion protection, or special materials? Our experienced engineering team provides full technical support for complex designs and offers non-standard customization, focusing on tight tolerances and reliable performance for your critical applications.
Our end-to-end strict quality control (QC) processes deliver components with up to 30% longer service life under demanding conditions. We provide material certifications and test reports for complete traceability and peace of mind.
Leveraging our mature supply chain and large-scale production, we offer stable supply, competitive pricing, and flexible MOQs (bulk or small batches). Our fast replenishment system aligns with your production schedule, helping you reduce procurement costs without compromising quality.
For over 20 years, Gonuo has been a trusted brand in precision transmission components, exporting to North America, South America, Russia, and beyond. Based in Ningbo, China, we are committed to consistent quality and long-term partnerships, serving industries worldwide.
Whatsapp: +86-18868534347
E-mail: lucy@gonuo-hardware.com
ADD: 904 No.426, Xueshi Road, Yinzhou , Ningbo, China.
Mobile: 0086-18868534347