| Item | Details |
|---|
| Raw Material & Anti-Corrosion Grade | Made of premium SUS304 stainless steel, with customizable A2-70 and A4-70 performance grades. This material delivers stable anti-rust and anti-oxidation performance, suitable for indoor furniture, leather crafts and mildly humid working environments without discoloration or rust stains. The base metal supports multiple surface finishing treatments to meet different aesthetic and protection needs. |
| Product Category & Structural Feature | Classified as Hollow Chicago Screw on Made-in-China platform, it adopts separable two-piece male-female threaded pair structure. The matching external thread screw and internal thread hollow barrel can be disassembled repeatedly, realizing invisible panel connection without protruding parts after installation. |
| Torx Star Anti-Theft Drive Recess | Equipped with standard torx star anti-theft inner drive, which requires dedicated torx screwdrivers for disassembly. It effectively prevents unauthorized disassembly for display racks, public equipment and furniture hardware, while providing high tightening torque and avoiding tool slipping during long-term vibration use. |
| Thread Pair Locking Connection Mechanism | Complete male and female matched thread structure, manufactured via precision thread rolling process with uniform tooth profile and tight meshing clearance. Unified thread tolerance control is applied to all metric sizes, preventing thread wear, slipping and loose joints after frequent assembly and disassembly cycles. |
| Countersunk Flat Concealed Head Design | Adopts countersunk flat head profile that fully sinks into the surface of wood, leather and metal panels to achieve flush invisible installation. The smooth polished head surface has no sharp burrs, maintaining neat minimalist appearance for high-end furniture and album binding projects. No anti-slip knurls are designed on the standard head surface. |
| Production & Dimensional Inspection Standards | All production and inspection processes comply with DIN, GB and ANSI international fastener standards, with ISO general mechanical tolerance control implemented for all finished goods. Custom non-standard sizes can be produced according to complete engineering drawings provided by clients. |
| Customizable Mechanical Hardness Grade | Two mainstream stainless steel grades are available for selection: A2-70 for regular light-load assembly scenarios, and A4-70 for enhanced anti-corrosion demands such as damp bathroom furniture and coastal decorative hardware. Custom hardness adjustment is acceptable for special load requirements. |
| Standard Export Logistics Packaging Scheme | Each screw set is individually packed with PE polybags to avoid surface scratches and oxidation during cross-border transportation. Outer packaging adopts thickened shock-resistant export cartons; wooden pallet stacking service is available for large bulk orders to simplify container loading and reduce transit damage risks. |
| Flexible Custom Metric Size Range | Full metric series M2-M10 are fully customizable, with M6 and M8 standard sizes kept in stock for fast delivery. Clients can freely adjust hollow barrel length from 6mm to 100mm, barrel diameter and head diameter according to actual panel thickness demands. |
| Brand Custom Laser Marking Service | HYS brand logo can be marked on finished products by default. We support full OEM private brand customization for long-term bulk partners, including laser engraving exclusive trademarks and custom patterns on countersunk flat heads or hollow barrel sleeves. |
| Manufacturing Origin Country | China |
| All-Round Customization Support Service | Yes, almost all core product parameters support personalized customization, including thread diameter, barrel length, torx recess depth, surface plating color and brand laser marking. We provide pre-production custom samples for client confirmation before mass production. |
| Engineering Drawing Supply Service | Yes, complete 2D dimension drawings with full size labels can be offered free of charge, clearly marking torx depth, countersunk head thickness, barrel length and thread specifications for client size verification. |
| Multi-Scenario Application Coverage | Widely applied to furniture panel splicing, solid wood assembly, leather craft fitting, photo album & notebook binding, display stand fixing and light-load decorative hardware connection. Its anti-theft torx design is especially favored for public facility and retail display equipment. |
| Complete Standard Machining Production Process | SUS304 stainless steel raw material cold heading forming, CNC precision turning, high-precision thread rolling, torx star recess forming, countersunk flat head finishing, surface polishing, optional zinc plating or black oxide anti-corrosion treatment, final full dimensional inspection and appearance screening. |
| Comprehensive OEM & ODM Custom Service | We provide one-stop OEM and ODM customized service, able to develop exclusive two-piece hollow torx Chicago binding screw solutions targeted at furniture factories, leather craft brands, album manufacturers and display hardware suppliers. |
| Optional Surface Anti-Corrosion & Decorative Finishes | Standard finish is mirror polished stainless silver luster; zinc plating and black oxide coating are optional alternative treatments to satisfy different anti-rust grade and color appearance requirements. |
| Stainless Steel Anti-Oxidation Functional Advantage | The SUS304 stainless steel substrate forms a dense natural protective film against air and moisture. After polishing or electroplating secondary treatment, its anti-tarnish performance is further improved, keeping stable metallic texture during long-term storage and daily use. |
| Knurl Structure Configuration Description | N/a, the standard countersunk flat head and hollow barrel sleeve have no serrated anti-slip knurl texture. Separate mold opening development is required if knurled surface is needed. |
| Core Competitive Product Selling Points | Torx star anti-theft drive, flush countersunk flat head, two-piece detachable male-female hollow Chicago screw structure, SUS304 A2-70/A4-70 anti-corrosion stainless steel, customizable metric sizes M2-M10, multiple surface plating options, reusable invisible binding fastener for furniture and leather crafts. |
