Products Description
A Chicago Screw consists of a cylindrical shank (screw rod) with internal and external threads and a nut with a matching inner bore. Its structural design is extremely simple, yet it delivers an exceptionally high level of connection reliability and ease of disassembly. Compared with traditional bolts, the Chicago Bolt boasts a design advantage of convenient disassembly after fastening, making it particularly suitable for application scenarios requiring frequent assembly or disassembly.
Different from the connection mode of traditional screws and nuts, a Stainless Steel Chicago Bolt features two rotatable components-the nut and the screw rod-offering a more convenient disassembly method and high resistance to loosening. The materials and manufacturing processes of the screw and nut can be customized according to requirements to meet the specific needs of different customers.
Product Advantages
Anti-loosening, Long-term Stability
The toothless cold stamping process enables the Flat Head Chicago Screw to achieve a tensile strength 1.5 to 2 times that of conventional cut threads. Combined with the full-thread structural design, it bears force evenly during tightening, avoiding deformation caused by local stress concentration. For high-vibration scenarios, self-locking threads or special pre-tightening adhesive treatment are available, which can withstand high-frequency electromagnetic impact and equipment vibration without loosening after long-term use, ensuring the mechanical stability of electrical connections.
Low-resistance Conductive Contact, Lossless and Reliable Electrical Conduction
The thread crimp design of the Round Head Chicago Bolt ensures tight fitting of metal surfaces, realizing low-resistance electrical conduction and avoiding heating and signal attenuation caused by poor contact. The copper alloy version features an electrical conductivity of over 40% IACS, suitable for high-current conduction scenarios; the stainless steel version is silver-plated to enhance electrical conductivity while retaining excellent corrosion resistance, meeting both electrical and protective requirements.
Upgraded Weather Resistance, Strong Adaptability to Complex Environments
The surface of the Post and Screw Fastener is treated with galvanizing, nickel plating, or passivation to form a dense protective layer, which can resist corrosion in complex environments such as humidity and salt spray. The 316L stainless steel version passes the 48-hour salt spray test without rusting, suitable for marine engineering and outdoor equipment; the silver-plated version further improves conductivity and anti-sulfuration performance, adapting to the harsh working conditions of new energy vehicles.
Precision Dimensional Control
Full-process dimensional calibration ensures that the thread inner diameter, outer diameter, and pitch all comply with ISO/DIN international standards. The Chicago Binding Screw of the same batch has minimal dimensional deviation, which can be directly adapted to automated assembly equipment and improve production efficiency. The miniature version adopts the thread rolling process to reduce friction during assembly and avoid thread damage.
Production Process
Screening and Pretreatment of High-Purity Raw Materials
Strictly select carbon steel, stainless steel, or copper alloy wires complying with ASTM standards. After incoming inspection, the component purity is verified by spectral analysis to ensure that the mechanical strength and electrical conductivity meet the design requirements. The wire surface is derusted and lubricated, laying a foundation for the subsequent cold stamping forming of Brass Chicago Screws.
Surface Protection and Whole-Process Inspection
Galvanizing, nickel plating, or passivation treatment is carried out according to scene requirements to enhance corrosion resistance and electrical conductivity; X-ray flaw detection, hardness testing, and salt spray corrosion testing are conducted before delivery to ensure that the structural strength, dimensional accuracy, and weather resistance of each Chicago Binding Screw meet the standards. Defective products are directly rejected, with a yield rate of 99.8%.
Non-serrated Cold Stamping Forming
A high-speed impact cold press is adopted to form the metal blank into a full-thread structure without heating the material, avoiding material loss and structural weakness caused by thread cutting. This process makes the internal structure of the thread compact and uniform, significantly improving the tensile strength and fatigue resistance, and is a core link to ensure the high rigidity of Electrical Panel Chicago Bolts.
Thread Rolling and Precision Calibration
For Ledger Screws with special requirements, the thread rolling process is used instead of cutting or forming, making the thread surface smoother and the strength higher. After forming, the thread dimensions are calibrated by high-precision measuring instruments to ensure that the inner diameter, outer diameter, and pitch all comply with international standards, avoiding poor assembly caused by dimensional deviations.
Customization and Services
We provide full-dimensional customization services for Stainless Steel Chicago Bolt, covering structural and material aspects. We can customize structures such as fully threaded and self-locking threaded types according to the installation depth and anti-vibration requirements of equipment. For scenarios involving high corrosion and high current, we match exclusive materials and surface protection processes such as 316L stainless steel and silver-plated copper alloy. Whether for the precision connection of miniature relays or the high-vibration scenarios of high-voltage circuit breakers, we can quickly deliver adaptive solutions, eliminating the need for secondary modification by customers.
Our technical team offers end-to-end support for Flat Head Chicago Screw from connection scheme design to performance verification: we assist in evaluating the connection load and environmental characteristics of equipment, and recommend optimal screw specifications and process parameters; we provide customized samples free of charge, and cooperate in completing reliability tests such as vibration and salt spray tests to verify the actual adaptive effect, helping customers quickly complete product verification and mass production switchover, and effectively shortening project cycles.
We have the capability of global logistics delivery, with the following lead times for Ledger Screw:
- Free samples: 1-2 days
- Newly molded samples (including mold development and sample production): 20-30 days
- Mass production orders: 15-20 days (after order confirmation and payment)
All Chicago Screws are certified in accordance with ISO9001-2015, IATF16949, and other standards, and comply with RoHS and REACH environmental protection directives. Complete production and testing records are retained for each batch to support quality traceability, providing a worry-free procurement experience for global customers.
Contact Us
If you have any requirements concerning the procurement, selection, sample request, or customization of Chicago Screw, or if you wish to obtain further information regarding product details, please do not hesitate to contact us. We will deploy a professional team to provide personalized one-on-one service, develop customized adaptation solutions, and guarantee stable supply, precise selection, and efficient procurement processes.
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