| Item | Details |
|---|
| Main Raw Material Characteristic | This fastener is made of high-purity solid H62/H65 brass as standard raw material. Brass material features excellent ductility, easy machining, natural golden metallic luster and stable anti-oxidation performance under indoor environment. It won't easily rust like carbon steel and stainless steel, making it ideal for leather crafts, album binding and decorative furniture assembly. Stainless steel |
| Product Core Category Definition | Classified as Chicago screw on the B2B platform, also widely named Corby bolt in leather hardware industry. It adopts a separable two-piece male and female hollow barrel threaded structure, specially designed for detachable fixed connection of leather, paper albums, solid wood panels and display craft parts. The paired screw and barrel nut can be disassembled and reused repeatedly without scratchi |
| Slotted Flat Drive Recess Design | Equipped with standard straight slotted flat drive structure, matching common flat-blade screwdrivers for convenient manual assembly. The integrated milling slotted groove has uniform depth and smooth inner wall, avoiding screwdriver slipping during tightening operation. This simple drive structure greatly reduces assembly tool cost and suits mass hand-mounting production of leather goods factorie |
| Thread Pair Locking Connection Principle | Matched male external thread screw and female hollow cylindrical sleeve internal thread form a complete threaded pair locking system. All threads are processed by precision thread rolling technology, with uniform tooth profile and tight meshing clearance. Unified thread tolerance control is implemented for all M2-M10 metric specifications to prevent thread slipping, tooth wear and loose connection |
| Cheese Cylindrical Head Appearance Structure | Adopts neat cheese cylindrical straight head design without protruding round arc edges. The vertical cylindrical side wall fits closely on leather, wood and metal plate surfaces after installation, presenting a minimalist industrial decorative effect. No knurled anti-slip texture is processed on the head outer wall to retain the smooth polished brass texture. |
| Production & Inspection Execution Standards | The whole machining, thread rolling and dimensional inspection strictly follow DIN, GB and ANSI international fastener standards. Non-standard special sizes can be produced according to ISO engineering drawings. All finished brass screws are sampled and measured referring to ISO 2768 general mechanical tolerance standard to guarantee consistent dimensional accuracy for each batch of goods. |
| Customizable Brass Hardness Standard | Different brass hardness levels can be customized according to client usage scenarios. Soft brass with low hardness is applied to thin leather and fragile craft binding; medium-hard brass with enhanced compression resistance is used for furniture and thick plate assembly, avoiding deformation under moderate fastening pressure. |
| Export Standard Logistics Packaging Scheme | Each set of brass Corby bolt is individually packed with PE polybag to prevent surface scratch, fingerprint stain and brass oxidation during long-distance sea and land transportation. Outer packaging adopts thickened shock-resistant reinforced export cartons; wooden pallet stacking service is available for large bulk orders to simplify container loading and lower cargo damage risk in transit. |
| Full Range Customizable Dimensional Specification | Complete metric thread series M2 to M10 are fully customizable, covering tiny miniature hardware and heavy-duty furniture connection sizes. Customers can freely adjust the height of hollow barrel sleeve, overall screw length and thread pitch according to the thickness of connected leather or wood panels, with various short and long binding post sizes available on demand. |
| Brand Laser Marking Custom Service | HYS brand identification can be printed on finished products by default; full OEM private brand customization is supported for long-term bulk cooperative clients, including laser engraving exclusive logo, surface etching brand mark and customized identification patterns on slotted cheese head or brass barrel sleeve. |
| Manufacturing Production Origin | China |
| All-Round Parameter Customization Support Service | Yes, almost all core product parameters support independent personalized customization. Customizable items include thread diameter, hollow barrel length, slotted groove depth, brass surface electroplating color, thread tolerance and engraved brand logo. Custom pre-production samples can be manufactured and sent for client confirmation before formal mass production. |
| Engineering Drawing Supply Service | Yes, complete 2D dimension engineering drawings with full parameter labels can be provided free of charge. Drawings clearly mark slotted depth, cheese head height, barrel length and thread size, helping customers verify all dimensional details before order placement. |
| Multi-Scenario Application Coverage | Mainly used for leather craft Corby bolt assembly, handmade notebook and photo album binding, hidden connection of furniture panels, decorative craft hardware fitting, display rack assembly and light-load metal plate fixed connection. The unique brass golden appearance also makes it popular for high-end leather goods and custom craft decoration. |
| Complete Standard Brass Machining Process Flow | Solid brass bar CNC precision turning forming, precise thread rolling molding, slotted flat head milling processing, cheese cylindrical head finishing, natural brass mirror polishing treatment, optional nickel plating or gold plating anti-oxidation coating, finished product full dimensional inspection and appearance screening. |
| Comprehensive OEM & ODM Custom Service Scope | We provide one-stop full-process OEM and ODM customized service, capable of developing exclusive two-piece hollow brass Corby Chicago binding bolt solutions targeted at leather craft factories, furniture brands, cabinet hardware suppliers and handmade craft merchants. |
| Optional Surface Anti-Oxidation & Decorative Finishes | Standard surface finish is natural mirror polished brass golden texture; multiple alternative anti-tarnish electroplating treatments are optional, including nickel silver plating, bright gold plating and black oxide coating, to satisfy different customer demands for appearance tone and brass anti-oxidation grade. |
| Brass Anti-Oxidation Functional Advantage | Solid brass base material itself has inherent anti-oxidation performance, far better than ordinary carbon steel without easy rusting. After polishing or secondary electroplating treatment, a dense protective film forms on the metal surface, effectively isolating air and moisture to prevent brass discoloration and tarnish during long-term indoor storage and daily use. |
| Knurling Structure Configuration Description | N/a, the standard cheese cylindrical head and hollow brass barrel sleeve of this Corby Chicago screw have no serrated knurled anti-slip texture on the surface. Separate mold opening customization is required if customers need products with knurled anti-slip structure. |
| Core Competitive Product Selling Points | Straight slotted flat drive, neat cheese cylindrical head appearance, two-piece detachable male & female hollow Corby Chicago binding bolt structure, solid H62/H65 anti-tarnish brass material, smooth polished metallic texture, full customizable metric sizes M2-M10, reusable invisible leather and furniture connecting fastener, multiple electroplating color options available. |
