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.
The 4 Prong T-Nut (commonly known as a Tee Nut) is a specialized internally threaded insert designed to provide a flush, high-torque steel thread profile in wooden, composite, or polymer workpieces. By utilizing four precision-forged prongs, these nuts anchor themselves deeply into the substrate, offering high resistance to rotation, push-out, and stripping when mating bolts are tightened.
At Sinsun Hardware, our production parameters ensure perfect concentricity between the flange collar and the barrel. We strictly monitor:
By utilizing premium alloy steels and high-grade stainless steels, Sinsun's 4 Prong T-Nuts maintain exceptional performance metrics, achieving tensile strength parameters exceeding 800 MPa when heat-treated.
At SINSUN, our quality control begins at the source. We start with premium raw materials from XING TAI Steel, then perform in-house spheroidizing annealing and precision wire drawing in our own plant. This end-to-end control, supported by our advanced drawing machines and gas-fired furnaces, ensures superior microstructure, consistency, and performance in every fastener we produce. We combine German-engineered multi-station cold heading machines with precision Taiwanese production technology.
Equipped with advanced German multi-station cold heading machinery and Taiwanese progressive tooling systems. This guarantees high precision for custom sizing and complex geometric tolerances.
Our four continuous gas-carburizing heat treatment furnaces allow precise temperature curves to guarantee stable hardness values (HRC 28-32) and prevent thread embrittlement.
Every single batch undergoes dimensional inspection, salt spray testing, thread go/no-go ring gauges, anti-torque load testing, and tension profiling to ensure zero-defect delivery.
Modern industrial procurement requires high agility and predictable production times. Sinsun Hardware's manufacturing ecosystem is built on a Factory 4.0 blueprint. By digitizing our 12,000 sqm warehouse, we maintain real-time material traceability from the spheroidizing annealing furnace stage down to the finished pallet ready for export.
Our location in Northern China provides strategic logistical advantages: direct access to major shipping corridors ensures minimal port lead times. Supported by automated packaging lines, we custom-brand and package shipments directly for OEM/ODM clients worldwide.
From Sinsun's founding in 2006, we have grown into a leading Chinese fastener manufacturer. Explore our journey of expansion, from establishing exports in 2012 and integrating German technology in 2018, to achieving a 36,000-ton annual output and adding advanced heat treatment lines by 2025.
Sinsun began with a singular focus: to build a factory dedicated to self-tapping screws. This specialization established our core expertise from the ground up.
The year 2012 marked a pivotal step with the establishment of our Export Department, introducing Sinsun quality to global distribution channels.
Sinsun added four spheroidizing furnaces for raw material processing and in-house wire drawing capabilities to control metallurgical properties from step one.
Production capability was enhanced with German multi-station cold heading machines, alongside expanding our product lines to include structural drill tail screws.
Sinsun's growth reached a massive 36,000 tons in annual production, fulfilling international orders with over 1,100 export containers.
To support prompt deliveries, Sinsun established optimized stock control and expanded ready-stock processing capability.
The latest expansion added four high-volume heat treatment lines to increase production capacity and provide greater quality control.
Providing rigid, blind-mate threaded mounting points for KD (Knock-Down) furniture. Prevents composite wood stripping under recurrent assembly stresses.
Heavy-duty, thick-flange T-nuts capable of sustaining dynamic loads and frequent handhold changes without back-out failure.
Vibration-resistant fastening solutions ensuring permanent driver mounting inside high-density fiberboard (MDF) cabinets.
As assembly industries pivot toward automated robotic insertion, traditional T-nut configurations must evolve. Sinsun is spearheading this shift by testing auto-feed-ready 4 Prong T-nuts designed with tighter flange tolerances and modified prong geometries.
Additionally, to meet global environmental compliance initiatives (including RoHS and REACH directives), our research division is expanding the implementation of Trivalent Chromium (Cr3+) and advanced Organic Silicate sealers. These coatings provide up to 1,000 hours of red rust resistance without compromising assembly torque or environmental safety.
Every month, we welcome clients for on-site factory visits, demonstrating our transparency and production strength. As a trusted partner, we actively participate in global fastener exhibitions to showcase innovation and build lasting relationships based on quality and reliability.
Stripping usually occurs due to poor thread concentricity or low core hardness in the fastener. Sinsun prevents this by maintaining tight dimensional tolerances (±0.02mm) during cold heading and applying precise heat treatment to achieve HRC 28-32.
For dry interior applications (like furniture assembly), C1008 or C1010 carbon steel is recommended. For high-humidity or marine applications (like outdoor climbing structures), stainless steel grades (SUS304 or SUS316) are required to prevent oxidation.
Yes. With our dynamic production tooling and Taiwanese progressive machinery, we manufacture custom barrel lengths and custom flange diameters to suit specific customer designs.
By utilizing a 12,000 sqm smart warehouse, raw material buffers from Xingtai Steel, and in-house heat treatment lines, we maintain complete control over scheduling to secure predictable lead times even during peak season.
