--- title: "SUS304 Stainless Steel Torx Flat Head Two-Piece Chicago Binding Screw" description: "SUS304 Stainless Steel Torx Flat Head Two-Piece Chicago Binding Screw — Countersunk & Flat-Head Machine Screws. MOQ 10,000 pieces, US$0.012 – 0.12." url: https://engineeringhardware.com/product/sus304-stainless-steel-torx-flat-head-two-piece-chicago-binding-screw/ source: Engineering Hardware & Fasteners --- # SUS304 Stainless Steel Torx Flat Head Two-Piece Chicago Binding Screw [![SUS304 Stainless Steel Torx Flat Head Two-Piece Chicago Binding Screw](https://img.engineeringhardware.com/SUS304-Stainless-Steel-Torx-Flat-Head-Two-Piece-Chicago-Binding-Screw.webp)](https://img.engineeringhardware.com/SUS304-Stainless-Steel-Torx-Flat-Head-Two-Piece-Chicago-Binding-Screw.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Screws › Countersunk & Flat-Head Machine Screws](https://engineeringhardware.com/fastener-products/screws/countersunk-flat-head-machine-screws/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/sus304-stainless-steel-torx-flat-head-two-piece-chicago-binding-screw.md) Model no. **HysLSW062** US$0.012 – 0.12 / piece MOQ 10,000 pieces · Final price confirmed in your quote - **Head Style:** Countersunk Flat Head - **Standard:** DIN, GB, ANSI, ISO - **Grade:** Custom A2-70 / A4-70 Stainless Steel Grade - **Customized:** Yes - **Thread Specification:** Matching Male & Female Internal/External Thread - **Surface Treatment:** Mirror Polished Stainless Finish; Zinc Plating - **Tolerance Grade:** ISO 2768 General Mechanical Tolerance - **Package Size:** 30.00cm * 20.00cm * 20.00cm Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20SUS304%20Stainless%20Steel%20Torx%20Flat%20Head%20Two-Piece%20Chicago%20Binding%20Screw%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fsus304-stainless-steel-torx-flat-head-two-piece-chicago-binding-screw%2F) Specifications are as listed for this product. Engineering Hardware & Fasteners confirms ratings, mating parts, compatibility, packing and lead time with you before you order. ## Specifications | Model NO. | HysLSW062 | | --- | --- | | Groove | Torx Star Anti-Theft Recess | | Connection | Threaded Pair Connection Male & Female | | Head Style | Countersunk Flat Head | | Standard | DIN, GB, ANSI, ISO | | Grade | Custom A2-70 / A4-70 Stainless Steel Grade | | Customized | Yes | | Drawing | Yes | | Application | Furniture Panel Connection, Album&Leather Binding | | Process | Cold Heading,Turning,Thread,Forming | | Service | We Support OEM and ODM | | Thread Specification | Matching Male & Female Internal/External Thread | | Surface Treatment | Mirror Polished Stainless Finish; Zinc Plating | | Tolerance Grade | ISO 2768 General Mechanical Tolerance | | Corrosion Resistance | Excellent Stainless Steel Oxidation Performance | | Knurl Specification | N/a | | Key Features | Torx Star Anti-Theft Drive, Countersunk Flat Head | | Transport Package | Polybag+Export Strong Carton | | Specification | Customizable,Stock M6/M8, Full Metric M2-M10 Range | | Origin | China | | HS Code | 7318190000 | | Production Capacity | 100ton/Month | | Package Size | 30.00cm * 20.00cm * 20.00cm | | Package Gross Weight | 0.500kg | | Customization | Available | | Material | Stainless Steel | | Type | Hollow Screw / Chicago Screw | | Shipping Cost | Contact the supplier about freight and estimated delivery time. | | 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. | | Non-standard parts | 15-25days | | Category | [Countersunk & Flat-Head Machine Screws](https://engineeringhardware.com/fastener-products/screws/countersunk-flat-head-machine-screws/) | ## Technical parameters | 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. | ## Description SUS304 Stainless Steel Torx Flat Head Two-Piece Chicago Binding Screw is part of our countersunk & flat-head machine screws range (Screws). ### Key details - **Type:** Hollow Screw / Chicago Screw - **Standard:** DIN, GB, ANSI, ISO - **Material:** Stainless Steel - **Grade:** Custom A2-70 / A4-70 Stainless Steel Grade - **Head Style:** Countersunk Flat Head - **Groove:** Torx Star Anti-Theft Recess - **Surface Treatment:** Mirror Polished Stainless Finish; Zinc Plating - **Connection:** Threaded Pair Connection Male & Female Available configurations include head style, standard, grade, customized and thread specification. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 10,000 pieces at US$0.012 – 0.12 per piece. Send one inquiry with the part number, quantity and destination, and Engineering Hardware & Fasteners confirms size, thread, material, grade, finish, price, lead time and shipping, checks the goods before dispatch and ships them to you. ## Frequently asked questions ### What is the minimum order quantity (MOQ) for SUS304 Stainless Steel Torx Flat Head Two-Piece Chicago Binding Screw? The listed minimum order is 10,000 pieces, at US$0.012 – 0.12 per piece. Smaller trial quantities or samples can be requested in your inquiry; Engineering Hardware & Fasteners confirms what is possible for your size. ### What are the main specifications of SUS304 Stainless Steel Torx Flat Head Two-Piece Chicago Binding Screw? Type: Hollow Screw / Chicago Screw; Standard: DIN, GB, ANSI, ISO; Material: Stainless Steel; Grade: Custom A2-70 / A4-70 Stainless Steel Grade; Head Style: Countersunk Flat Head; Groove: Torx Star Anti-Theft Recess. The full specification table and any technical parameter tables are listed on this page. ### Can this product be customized (OEM)? Listed configurations include head style, standard, grade, customized and thread specification. Size, thread, length, material and grade, surface finish, head marking, packaging and labels can be quoted to your specification or drawing. ### What is the lead time and how is it shipped? Lead time depends on quantity and customization and is confirmed in your quote. Engineering Hardware & Fasteners checks the goods before dispatch and ships by express, air or sea; mixed orders can be consolidated in one shipment. ### Which other countersunk & flat-head machine screws are available? The Countersunk & Flat-Head Machine Screws category lists 2,424 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/screws/countersunk-flat-head-machine-screws/](https://engineeringhardware.com/fastener-products/screws/countersunk-flat-head-machine-screws/) How we work ## Specified, checked and shipped by Engineering Hardware & Fasteners Engineering Hardware & Fasteners supplies bolts, screws, nuts, washers, anchors, rivets and fastening hardware to equipment makers, contractors, distributors and maintenance teams. Orders go through one controlled process: size, thread, material, grade and finish confirmed, samples approved, dimensions, thread fit and plating checked before packing, then packed for export — standard or made to drawing. - DIN, ISO, ASTM, ANSI, JIS and GB standard parts - Non-standard parts made to your drawing - Dimensions, thread gauges and plating checked before packing - Export cartons and pallets, consolidated mixed orders - Samples available for approval before mass production [![Production floor](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-01-production-floor-1024x683.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-01-production-floor.webp) Production floor [![Inspection bench](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-02-inspection-bench-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-02-inspection-bench.webp) Inspection bench [![Sorting & 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custom quote →](https://engineeringhardware.com/contact/) ## Request a quote for this product ## Related products [All Countersunk & Flat-Head Machine Screws →](https://engineeringhardware.com/fastener-products/screws/countersunk-flat-head-machine-screws/) [![Customized Helmet Semi-Hollow Countersunk Head Rivets Metal Semi Tubular Rivet for Helmet](https://img.engineeringhardware.com/Customized-Helmet-Semi-Hollow-Countersunk-Head-Rivets-Metal-Semi-Tubular-Rivet-for-Helmet-2.webp)](https://engineeringhardware.com/product/customized-helmet-semi-hollow-countersunk-head-rivets-metal-semi-tubular-rivet-for/) Countersunk & Flat-Head Machine Screws ### [Customized Helmet Semi-Hollow Countersunk Head Rivets Metal Semi Tubular Rivet for Helmet](https://engineeringhardware.com/product/customized-helmet-semi-hollow-countersunk-head-rivets-metal-semi-tubular-rivet-for/) Stainless Steel · Bronze, Zinc Plated, Rainbow, Plain, Nickle Plated **US$0.036 – 0.36**MOQ 1,000 pieces [![Brass Solid Hollow 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