Explore our top-tier manufacturing lines engineered for heavy-duty construction, structural steel integrity, and specialized OEM applications worldwide.
High-precision load-distribution washers designed to prevent pull-through in soft materials.
Heavy-duty construction fasteners optimized for rapid torque transmission and structural integrity.
Heavy-duty suppliers & factory direct square drive pan head screws for wood and metal construction.
Contractor-grade #6 x 1-5/8" self-drilling drywall screws engineered for high-speed installation.
OEM high-performance concrete T nails delivering exceptional shear resistance in masonry applications.
Wholesale structural timber fasteners built for extreme withdrawal resistance and longevity.
Precision-manufactured wholesale office staples ensuring jam-free mechanical operations.
Zero reinforcement required, easy drill and drive fasteners designed for seamless structural deployment.
As global supply chains demand uncompromising precision, Sinsun Hardware stands at the vanguard of fastener manufacturing. Specializing in advanced ODM solutions like short neck carriage bolts, we bridge the gap between heavy industrial requirements and rigorous international quality standards.
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 and customized industrial bolts, we operate from a gigantic 30,000 sqm integrated facility that includes modern production zones, a 12,000 sqm smart warehouse with over 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, providing unshakeable reliability for international contractors and distributors.
Our production prowess is driven by German-imported machinery, precision Taiwanese technology, and a dependable staff of trained specialists dedicated to zero-defect manufacturing.
We offer over 20,000 SKUs of nails, screws, wires, and rivets, each undergoing 12+ stringent quality checks to assure outstanding polish (Ra β€ 0.4ΞΌm), corrosion resistance (1,000+ hours salt spray), dimensional accuracy (Β±0.02mm), high tensile strength (1,000+ MPa), and consistent hardness (HRC 28-32).
Get a Quick Quote
Quality control begins at the source with premium raw materials from XING TAI Steel. We perform in-house spheroidizing annealing and precision wire drawing, ensuring superior microstructure, uniform grain flow, and exceptional mechanical performance in every short neck carriage bolt.
Explore Raw Materials
Operating four dedicated heat treatment lines allows for precise thermal processing control. This in-house capacity achieves uniform hardness and enhanced durability, guaranteeing compliance with global structural load-bearing requirements.
Learn About Heat TreatmentFrom our founding in 2006 to state-of-the-art smart manufacturing in 2025, explore our evolutionary journey toward becoming a global powerhouse in industrial fastener manufacturing.
Established with a singular focus on building a factory dedicated to high-performance screws and specialized fasteners.
Founded our dedicated Export Department, extending our specialized manufacturing reach to international markets.
Added spheroidizing furnaces and in-house wire drawing capabilities for rigorous control over raw material quality.
Imported advanced German multi-station cold heading machines, scaling our production efficiency and precision.
Reached monumental milestones with 36,000 tons annual output and over 1,100 export containers fulfilled.
Integrated 4 brand-new heat treatment lines, ensuring absolute consistency, superior metallurgy, and reliable delivery schedules.
Short neck carriage bolts are critical components in automotive chassis assembly, agricultural machinery, railway infrastructure, and structural timber connections. Sinsun Hardware ensures every product strictly adheres to international standards including DIN 603, ISO 8677, and ASME B18.5.
Designed with a low-profile square neck underneath a rounded head, our short neck carriage bolts prevent rotation during installation in confined sheet metal and chassis channels, meeting rigorous automotive vibration resistance standards.
Engineered for high shear strength in structural timber and steel framing. Enhanced surface passivation and hot-dip galvanization ensure over 1,000 hours of salt spray resistance for harsh outdoor environments.
With our 12,000 sqm warehouse and expert packaging team, we provide customized bulk or retail packaging, 3D design previews, barcoding, and complete logistics documentation for effortless customs clearance.
Expert answers regarding our short neck carriage bolts, manufacturing capabilities, and global trade compliance.
Short neck carriage bolts feature a significantly shallower square shoulder beneath the rounded head. This specialized design is engineered specifically for thinner metal plates, automotive applications, and restricted clearance joints where standard deep-neck bolts would cause material distortion or bottom out.
All our fasteners, including carriage bolts, screws, and nuts, are manufactured in strict compliance with ISO, DIN, ANSI/ASME, and JIS standards. Every production batch undergoes 12+ rigorous quality checks, including tensile testing, salt spray corrosion testing, and optical dimensional sorting.
Yes. As a leading manufacturer with end-to-end integration from raw wire drawing to advanced heat treatment and coating lines, we offer fully customized thread pitches, shank lengths, material grades (e.g., Grade 4.8, 8.8, 10.9), and surface finishes like Dacromet, Hot-Dip Galvanized, and Zinc Plating.
Thanks to our robust 30,000 sqm facility, massive ready-stock inventory, and optimized production lines, standard orders are dispatched within 15 to 25 days. We successfully manage over 8,500 container shipments annually with a 99% on-time delivery rate.
Explore our extensive catalog designed to provide complete fastening ecosystems for global distributors and industrial contractors.
China pan head wood screws factory offering strong and reliable suppliers for enhanced wood joint performance.
Precision-threaded OEM acorn nut manufacturers providing decorative and protective thread coverage.
High-withdrawal-resistance twisted shank nails manufactured for heavy wooden pallet and crate construction.
Corrosion-resistant galvanized self-tapping screws engineered for superior metal-to-metal piercing.
High-tensile security barbed wire supplied globally for perimeter protection and agricultural fencing.
Durable checkered-head sinker nails manufactured for professional framing and general carpentry.
OEM pneumatic galvanized coil nails designed for high-speed pallet assembly and roofing applications.
High-strength hex nuts supplied globally, engineered for maximum torque retention and thread engagement.
