Precision Fasteners for Sliding Door, Window and Shower Hardware
Sliding hardware is exposed to repeated movement, vibration, impact and, in shower applications, constant humidity. Its fasteners must maintain stable dimensions, secure locking and long-term corrosion resistance.
We have supplied custom fasteners to OPK, a leading sliding hardware brand, for more than 10 years. During this cooperation, we have jointly developed and mass-produced over 300 dedicated fastener models for sliding doors, windows, minimalist door systems, shower enclosures, damping rollers and synchronized sliding systems.
We offer a range of significant benefits:
01. Proven Performance in High-Frequency Sliding Systems
You receive fasteners developed for components that are opened, closed, pushed and pulled repeatedly, helping reduce loosening, wear and assembly failure.
How we achieve it:
- More than 10 years of supply experience for OPK sliding hardware systems.
- Over 300 mature fastener models have entered stable production.
- Fasteners are developed for actual sliding, damping and linkage structures.
- Material, dimensions and surface treatment are selected according to the working condition.
- Existing solutions can be adapted for new sliding hardware projects.
- Samples can be tested directly in the customer’s roller, track or connector assembly.
Typical applications include:
- Sliding doors and windows
- Minimalist sliding doors
- Soft-closing systems
- Shower enclosure rollers
- Synchronized sliding systems
- Folding and linkage hardware
02. More Stable Assembly for Precision Hardware Parts
Controlled dimensions help fasteners fit rollers, brackets, tracks and linkage components more accurately, reducing difficult assembly and excessive joint clearance.
How we achieve it:
- Head diameter, shank diameter, thread length and overall length are inspected during production.
- Critical tolerances are confirmed according to the customer’s drawing.
- New tooling undergoes first-piece verification before mass production.
- Tooling is checked regularly to prevent gradual dimensional variation.
- Calipers, micrometers and optical measuring equipment are used for inspection.
- Custom gauges can be developed for high-volume products.
03. Lower Risk of Loosening During Repeated Sliding
Frequent opening and closing creates vibration and alternating loads. Without the correct thread, locking structure or fit, screws may gradually loosen during long-term use.
How we achieve it:
- Thread profiles are selected according to the mating material and assembly position.
- Custom shoulders, steps, heads and thread lengths can be developed.
- Thread-locking adhesive can be added when required.
- Anti-loosening structures can be designed for vibration-prone components.
- Go/no-go gauges and thread gauges are used to verify thread fit.
- Tightening torque and assembly testing can be arranged according to the customer’s requirements.
Available anti-loosening options include:
- Thread-locking adhesive
- Serrated heads
- Flange structures
- Washer-integrated heads
- Custom thread engagement
- Shoulder and step designs
- Customer-specified locking structures
04. Better Corrosion Resistance for Shower and Humid Areas
Fasteners used in shower enclosures and humid indoor environments may develop rust, discoloration or coating damage if the material and surface treatment are not properly selected.
How we achieve it:
- Surface treatment is selected according to the humidity level and exposure position.
- Zinc plating, nickel plating, chrome plating, Dacromet and zinc-nickel finishes are available.
- SS304 and SS316 stainless steel can be used for higher corrosion-resistance requirements.
- Surface appearance and coating adhesion are checked after treatment.
- Salt-spray testing can be arranged according to the customer’s standard.
- Threads are inspected again after plating to prevent coating-related assembly problems.
05. Faster Development for New Hardware Products
New sliding systems often require non-standard screws, pins, rivets and formed parts that cannot be replaced by general-purpose fasteners.
How we achieve it:
- We review your 2D drawing, 3D file, physical sample or assembly structure.
- Our team evaluates forming feasibility, material, tolerance and surface treatment.
- New tooling can be developed for special heads, shoulders, steps and thread structures.
- Small trial orders are available for new product verification.
- Samples are adjusted according to assembly and functional test results.
- Approved products can move directly into stable mass production.
Custom products include:
- Shoulder screws
- Step screws
- Custom machine screws
- Special head screws
- Rivets
- Positioning pins
- Knurled pins
- Bolts and studs
- CNC-machined components
- Cold-formed non-standard parts
06. More Reliable Supply for Standard and Custom Parts
Mature tooling, standardized production and complete inspection help support continuous supply for established products and synchronized development for new models.
How we achieve it:
- More than 300 mature fastener models have already been developed for sliding hardware.
- Standardized products can be produced repeatedly using approved tooling.
- New and existing products can be scheduled together according to the project plan.
- Complete production equipment supports small trial orders and large-volume orders.
- Inspection is carried out from incoming material to final packing.
- Production progress and inspection photos can be provided during order execution.
- Inspection reports can be prepared according to the buyer’s requirements.
Why Choose Us
Core Manufacturing & Service Advantages
Stable production, flexible customization and clear order follow-up help you control quality, cost and delivery.
Over 30 years of manufacturing experience and technical knowledge, with practical guidance for product development and production.
More than 80 Taiwan-imported production machines support a monthly capacity of over 150 tons.
Factory advantage: 10,000㎡ self-owned factory, direct manufacturer, cost & lead time controllable.
Quality is controlled from raw material inspection and production to packing and shipment.
6 years of export experience, supporting quotations, samples, documentation, customs clearance and shipping.
We have served over 2,000 companies, including more than 50 customers who have worked with us for over 20 years.
We can support OEM/ODM customized development, new product trial production.
Whole-process order follow-up: update production schedule & QC inspection photos regularly, guarantee on-time delivery and inform any unexpected issues timely. Products with quality issues can be returned and replaced as needed.
Large quantity orders can be customized with packaging and logos as per requirements.
Leading Custom Fastener Manufacturer In China
Shenzhen Justwin Technology Co., Ltd. serves as the exclusive export division of Zhongshan Shenghong Machinery Technology Co., Ltd,which is established in 1993 and is a fastener company that integrates product research and development, sales and services.
Our integrated manufacturing base is equipped with complete production lines, a standardized quality control system and a professional technical team. We adopt unified standards in production management, quality inspection and R&D.
We specialize in the global supply of fasteners, hardware parts and customized mechanical components. Backed by integrated factory operations, we offer genuine factory-direct pricing, consistent and sufficient supply, as well as efficient, standardized one-stop export services.
We strive to deliver high-quality products and thoughtful international trade support for global clients, aiming to establish long-term, stable and win-win partnerships worldwide.
30+ Years of Fastener Manufacturing Experience
With more than 30 years of production and product development experience, we understand the requirements of standard fasteners, special fasteners and OEM projects.
High Quality
Technology
Sustainability
Our complete production lines allow us to arrange both small trial orders and large-volume production.
We support growing companies with flexible custom fastener development and negotiable MOQs based on the product and process.
We inspect each stage from incoming materials and production to surface treatment, packing and shipment.
Production and inspection are managed according to ISO 9001 procedures. Factory inspection reports can be provided, and third-party testing can be arranged when required.
Standard items in stock normally ship within 3–7 days. Rush orders can receive priority scheduling to help meet your shipment plan.
Custom fasteners and molded parts normally ship within 15–30 days, depending on product complexity.
OUR FACTORY
Fastener Manufacturing Facilities
Our 10,000+ m² self-owned factory is equipped with more than 80 production machines, supporting stable production for screws, rivets, pins and custom fasteners.
CUSTOM PRODUCTION PROCESS
From Your Drawing to Finished Fasteners
We manage each step from material inspection and tooling to batch production, testing, plating and final shipment.
01. Raw Material Inspection
02. 3D Product Design
03. Mold Development
04. Sample Approval
05. Mass Production
06. Electroplating
07. Multiple Quality Inspections
08. Salt Spray Testing
09. Packing and Shipping
QUALITY & COMPLIANCE
Certificates and Test Reports for Buyer Review
Relevant quality and compliance documents can be provided based on the product, material, surface finish and destination market.
ISO 9001 Quality Management System
EN 71-3 Material Safety Testing
REACH Chemical Compliance
RoHS Restricted Substance Compliance
Client Testimonial
What that say about Justwintec
Other Questions
FAQs
Yes. We manufacture custom screws, rivets, bolts, nuts, pins and special fasteners based on your drawing or sample.
Small trial orders are available. MOQ depends on the material, size, process and tooling requirements.
Mold development normally takes 7–15 working days.
Minor mold adjustments for sample improvement can usually be made without an additional charge. Major structural changes will be quoted separately.
Common materials include:
- Carbon steel
- 40Cr alloy steel
- Stainless steel SS304 and SS316
- Stainless steel A2 and A4
- Brass
- Aluminum
- Titanium
Other materials can be discussed according to your application.
Available surface treatments include:
- Zinc plating
- Black oxide
- Dacromet
- Nickel plating
- Chrome plating
- Zinc-nickel alloy coating
For zinc-plated products, salt spray resistance can be customized from approximately 48 to 500 hours depending on the coating system and project requirements.
Standard items in stock normally ship within 3–7 days.
Custom molded products normally require 15–30 days after sample confirmation.
Yes. We support OEM-branded packaging, custom logos and neutral export packaging.
Please provide:
- Drawing or sample
- Material
- Surface treatment
- Order quantity
- Required tolerance
- Target standard
The more complete the information, the faster we can provide an accurate quotation.
Yes. We can assist with export documentation, customs clearance and worldwide FCL or LCL shipment arrangements.
Send us a message
Feel Free to Reach Out for Further Details.
Looking for reliable fastener solutions? Justwintec is here to support your project with professional service, fast response, and stable factory supply.