tianhong Customized High-quality multi-series hex socket bolts
High-quality multi-series bolts including carriage bolts, hex socket carriage bolts, hex socket cylinder head screws and torx cylinder head hollow...
High-performance multi-series combination screws, including 2-combination and 3-combination types, pre-assembled with screws and washers for efficient installation, featuring anti-loosening, corrosion resistance, precise manufacturing and customizable options, widely applied in various industrial fields to meet diverse fastening needs.
Zhejiang TNHO fasteners provides high-quality pre-assembled combination screws (4 core types, duplicates integrated), designed to improve installation efficiency and fastening stability. Manufactured via strict cold forming processes and complying with international standards, these integrated screw-washer units eliminate manual matching, saving time and avoiding assembly errors.
Our products include: Cross Recessed Pan Head Spring & Flat Washer 3-Combination Screws (anti-loosening, for electronics and machinery); Cross Recessed Pan Head Flat Washer 2-Combination Screws (light-duty, for electrical appliances and precision instruments); Cross Recessed Cavity 2-Combination Screws (anti-slip, for auto parts and enclosures); Cross Recessed Hexagonal Cavity Spring & Flat Washer 3-Combination Screws (high-stress resistance, for renewable energy and electric meters).
| System of Measurement | Inch, Metric |
| Material | Stainless Steel, Carbon Steel, Steel, Brass, Iron, Aluminum |
| Thread Size | Metric: M1-M16; or customized |
| Head Type | Pan Head, Hex Head, Slotted Head, Torx Head, One-Way Head, Step Head, Flat Head, Large Head |
| Surface Finishing | Zinc Plating, Nickel Plating, Black Oxide, Dacromet |
| Production Process: | Cold Heading, Cold Forging，Cold Forming |
| Standard | ISO, JIS, GB, ANSI, BSW, DIN, Non-standard customized |
| Grade | 4.8, 6.8, 8.8, 12.9, etc |
| Brand | TNHO |
| Application | Electric Meter, Electrical, Electronic, Auto Parts, Renewable Energy Industry, etc. |
1.Efficient Installation: Pre-assembled design eliminates manual washer matching, saving time and reducing assembly errors, suitable for narrow spaces.
2.Anti-Loosening: 3-combination models with spring and flat washers resist vibration; 2-combination models ensure stable light-duty fastening.
3.High Durability: Premium materials and advanced cold forming processes ensure strong tensile strength, corrosion resistance and long service life.
4.Diverse & Versatile: Multiple types with different head designs meet diverse needs of electronics, auto parts and renewable energy industries.
5.Precise & Customizable: Complies with international standards; offers customization for thread size, material and surface finishing.
Professional Experience
A professional fastener manufacturer with mature technology and rich experience in combination screws.
Advanced Equipment
Equipped with automated production and strict testing equipment to ensure product quality.
Strong R&D
Professional R&D team optimizes products and provides customized solutions.
Perfect After-Sales
Comprehensive services including consultation, technical support and problem solving.
Competitive & Stable
Competitive prices and stable supply capacity to meet batch order needs.
