Company Profile：
Handan Trina Metal Co., . is a comprehensive manufacturing enterprise specializing in the research and development, production, sales and service of fasteners. It focuses on the customized production of high-end fasteners that are resistant to high pressure, high and low temperatures, and corrosion. The company takes a full-chain layout as its core advantage, covering raw material procurement, precision processing, personalized customization, centralized procurement, professional packaging, efficient logistics and worry-free after-sales services. It provides customers with one-stop fastener solutions.
Products Description：
| Product Name | DIN 1587 HEXAGON DOMED CAP NUT |
| Material | Carbon steel,Stainless steel ,Non-ferrous metals |
| Standard | GB/T 923-2009 |
| Grade | 6,8,10,12 |
| Diameter | M4,M5,M6,M8,M10,M12,M14,M16,M18,M20,M22,M24 |
Products Description：
| D | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 |
| P | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 | 2.5 | 3 |
| SA | 6.78 | 7.78 | 9.78 | 12.73 | 15.73 | 17.73 | 20.67 | 23.67 | 26.67 | 29.67 | 33.38 | 35.38 |
| SB | 6.64 | 7.64 | 9.64 | 12.57 | 25.57 | 17.57 | 20.16 | 23.16 | 26.16 | 29.16 | 33 | 35 |
| HA | 7.64 | 9.64 | 11.57 | 14.57 | 17.57 | 21.48 | 24.48 | 27.48 | 31.38 | 33.38 | 38.38 | 41.38 |
| HB | 7.42 | 9.42 | 11.3 | 14.3 | 17.3 | 21.16 | 24.16 | 27.16 | 31 | 33 | 38 | 41 |
| M | 3.2 | 4 | 5 | 6.5 | 8 | 10 | 11 | 13 | 15 | 16 | 18 | 19 |
| M | 2.9 | 3.7 | 4.7 | 6.14 | 7.64 | 9.64 | 10.3 | 12.3 | 14.3 | 14.9 | 16.9 | 17.7 |
| DK | 6.5 | 7.5 | 9.5 | 12.5 | 15 | 17 | 20 | 23 | 26 | 28 | 33 | 34 |
| DW | 5.9 | 6.9 | 8.9 | 11.6 | 14.6 | 16.6 | 19.6 | 22.5 | 24.9 | 27.7 | 31.4 | 33.3 |
Product Details：
The cap nut is an industrial fastener with a sealing cap structure, mainly used to prevent moisture or corrosive substances from entering the interior of the thread. Its structure is mainly composed of hexagonal nuts, with a sealing cover on the top. The exposed part on the outside is covered by the cover, which serves to prevent rust.
Main uses：
Youdaoplaceholder0 Anti-corrosion protection : Cover nuts are often used in mechanical components exposed to damp and corrosive environments, such as the fixed parts of car tires and the bases of outdoor lamps, to prevent the threads from rusting and affecting the connection stability.
Youdaoplaceholder0 Anti-loosening design : When some cover nuts are used in conjunction with split pins and inserts, the anti-loosening performance can be enhanced, making it suitable for vibration or alternating load scenarios.
Youdaoplaceholder0 Simplified disassembly : Some models are designed with a hand-tightening structure, which is convenient for frequent assembly and disassembly scenarios (such as tooling equipment).
Structural features：
It is usually of hexagonal structure, with an internal thread in the inner hole, and is used in conjunction with bolts.
The sealing cover is usually in a thin sheet and is fixed to the top of the main body by a snap or thread.
When selecting cover nuts, attention should be paid to specification matching (for example, M4-P0.7 corresponds to specific bolt specifications), and special tools (such as adjustable wrenches or square socket sockets) should be used during installation to avoid slippage.
Quality Inspection：
Why choose TRINA?
Relying on advanced production equipment, a complete detection system and the enterprise technology center, we strictly control every process from raw materials to finished products, achieving online monitoring throughout the process to ensure excellent and stable product quality. With competitiveness in supply chain support, logistics efficiency, cost optimization and product diversity, we continuously provide high-reliability fasteners for industries such as energy, chemicals, transportation and machinery, always adhering to the concept of "quality first, customer first", and striving to become a global leading fastener manufacturing service provider.
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