Explore our foundational range of heavy-duty construction fasteners, precision screws, and structural anchoring components built to match stringent ISO and DIN parameters.
Sinsun Hardware, established in 2006, is a leading manufacturer and global supplier of high-quality fasteners. As Northern China's largest producer of Self-Tapping Screws, we operate from a gigantic 30,000 sqm integrated facility that includes modern production zones, a 12,000 sqm smart warehouse (18,000+ pallet capacity), and multi-language customer support centres. Our yearly supply of over 8,500 containers consistently services key global markets such as the Middle East, Southeast Asia, South America, and Russia.
We combine advanced German-imported manufacturing lines and precision Taiwanese cold-heading technologies with certified raw material sources to produce dynamic components like M6 Cage Nuts, structural anchors, and specialized screws that support high-density datacenters and electrical cabinets globally.
Our production volumes reflect our capacity to handle large-scale municipal, enterprise, and industrial component programs.
M6 Cage Nuts (also commonly referred to as captive nuts or rack mount nuts) consist of a high-tension square nut held within a spring steel cage. The cage features two compressible wings (flanges) that allow insertion into standard square-punched server rack profiles. This design mitigates the risk of stripped threads on expensive equipment rails, providing simple component replacement.
| Specification Parameter | Carbon Steel Options (Standard) | Stainless Steel Options (Heavy-Duty) | Tolerance & Compliance |
|---|---|---|---|
| Cage Material | AISI 1065 Spring Steel (Heat Treated) | SUS 301 / 304 Spring Temper | ±0.05 mm |
| Nut Material | C1022A Carbon Steel / Q235 Carbon Steel | SUS 304 / SUS 316 Grade Stainless Steel | ±0.02 mm (High Precision) |
| Thread Profile | Metric M6 (Coarse Pitch 1.0mm) | Metric M6 (Coarse Pitch 1.0mm) | ISO 6H Thread Class |
| Corrosion Resistance | Yellow/Blue-White Zinc Plated (48h-120h Salt Spray) | Passivated Natural Finish (1000h+ Salt Spray) | ASTM B117 standards |
| Hardness Rating | HRC 38 - 45 (Cage) / HRC 28-32 (Nut) | HRB 90 max. / HRC 20-25 | GB/T 3098.2 / ISO 898-2 |
Our M6 cage nuts are manufactured using advanced stamping and forming technologies to ensure uniform spring tension. This prevents the cage from slipping out of the square mounting hole during heavy blade server installations.
While the M6 standard dominates telecom installations, we also produce custom dimensions to support varied deployment practices:
Data center expansion, driven by AI clusters and 5G computing infrastructure, requires highly reliable rack accessories. A single failing fastener can lead to alignment shift, structural strain, or costly hardware damage. Sinsun Hardware supports corporate buyers through standardized packaging, custom distribution schedules, and multi-language service centers.
Large-scale server farms require millions of cage nuts annually. Our high-speed production machinery ensures consistent mechanical performance and thread tolerances across large batches.
Outdoor telecom cabinets are exposed to varying moisture and temperature conditions. Our stainless steel (SUS304/316) cage nuts offer excellent salt-spray resistance in outdoor installations.
Heavy machinery and manufacturing environments expose enclosures to continuous vibration. Our heat-treated carbon steel cage nuts maintain high pre-load tension under operational stress.
Sinsun Hardware manages the entire manufacturing process internally. By overseeing each step from raw wire drawing through heat treatment to custom packaging, we maintain strict control over product quality and delivery times.
Our manufacturing capacity is driven by German-imported multi-station cold heading machines and precision Taiwanese tooling. This allows us to produce high volumes of fasteners while maintaining a dimensional tolerance of ±0.02mm.
Internal processes like tail-gripping for self-drilling screws and multi-stage stamping for steel cages help keep our production scrap rates low and thread geometry consistent.
We run four active in-house heat treatment lines. This dynamic capacity lets us control heating cycles and quench rates to achieve the high hardness ratings required for heavy load-bearing structural fasteners.
Internal heat treatment minimizes surface carbon variations and yields consistent hardness across both carbon steel screw tips and cage nut spring bands (HRC 38-45).
Our 12,000 sqm smart warehouse features an 18,000+ pallet capacity. An integrated ERP system tracks our extensive fastener catalog, helping us maintain an on-time shipping rate above 99%.
Whether you require standard bulk crates or custom OEM packaging with custom labelling, our team offers 3D design previews and dynamic shipping support to destination ports worldwide.
Modern data centers require components that support rapid deployment, environmental compliance, and structural longevity. Our engineering team is continuously working on improvements to cage nut designs and fastener coatings.
We are developing toolless mounting fasteners that allow technicians to install them by hand, helping reduce assembly times during initial rack configuration.
We continue to research high-resistance thin-film zinc coatings to replace traditional heavy passivation, supporting the industry's shift toward greener electronics manufacturing.
As server chassis weights increase due to liquid cooling systems and heavy GPU arrays, we are testing cage nuts with higher strip resistance to support heavier rack configurations.
We work closely with structural engineers and component buyers to supply custom fasteners tailored for demanding projects.
Find answers to common technical, material, and ordering questions regarding our industrial mounting fasteners.
Browse our additional fastener options, including heavy-duty anchoring bolts, specialty caps, concrete masonry screws, and construction nails.
Partner with a manufacturer that understands the role of reliable components in critical systems. Send us your technical drawings or project specifications, and our engineering team will provide a solution-focused quotation.
SINSUN
