| Item | Details |
|---|
| Raw Material Category | Plastic Steel series high-performance engineering plastics, including mainstream grades PEEK, PP, PA66, POM, PVC and PTFE. Features outstanding heat resistance, acid & alkali corrosion resistance and insulating performance, non-magnetic and lightweight compared with metal fasteners. |
| Product Classification | Hexagon socket countersunk head machine screw manufactured per DIN7991 standard. Countersunk design enables full sinking installation without protruding surface, widely used for hidden assembly in precision equipment. |
| Recess Groove Type | Standard inner hexagon drive (Hexagon). Matched with common hexagon wrenches for convenient disassembly and stable locking force, suitable for precision fastening scenarios. |
| Connection Mode | Standard common metric bolt structure with complete machine thread, designed for threaded hole matching. No self-tapping required, providing uniform and reliable clamping force. |
| Head Profile Shape | Countersunk conical head. The tapered surface can be fully embedded into the mounting hole to keep the workpiece surface flat, avoiding protrusion interference and scratch risks. |
| Applicable Production Standard | Mainly comply with DIN standard, core execution specification DIN7991 for countersunk inner hex plastic screws. Support customized non-standard sizes based on special customer requirements. |
| Performance Grade Characteristic | High temperature resistant engineering plastic grade. PEEK material can withstand long-term high-temperature working environment, while other plastic variants deliver stable anti-corrosion and insulating properties under normal temperature. |
| Export Transportation Package | Independent polybag inner packaging to prevent scratches and dust pollution during transportation; thickened reinforced export cartons for outer packing. Wooden pallet stacking is available for bulk sea shipment orders. |
| Complete Size Specification Range | Full metric thread series from M3 to M30, all screw effective lengths support personalized customization according to customer engineering drawings, strictly follow DIN7991 dimension standards. |
| Registered Brand | Tengri professional plastic fastener brand, complete full-process production and quality inspection system. Custom laser marking of brand logo and part number on screw head is available for bulk OEM orders. |
| Production Origin | All products are injected, machined and fully inspected in China. The factory owns automatic plastic injection molding equipment and precision CNC machining lines with stable monthly mass production capacity. |
| Customization Service Support | Full OEM & ODM customization service is available. Customizable items include special screw length, exclusive color matching, customized surface texture and tailored export packaging schemes. |
| Engineering Drawing Acceptance Rule | Accept customer-provided 2D engineering drawings and physical sample references. Professional technical team will verify dimensional feasibility and process difficulty before formal mass production. |
| Main Application Fields | Medical precision equipment, chemical corrosion-resistant instruments, electronic insulating components, laboratory testing machinery, high-temperature industrial automation equipment and lightweight new energy devices. |
| Complete Manufacturing Process Flow | High-performance plastic raw material injection molding forming, precision CNC secondary finishing, thread precision machining, surface deburring treatment, full dimensional inspection and packaging. |
| Comprehensive After-sales & Sample Service | One-stop customized supporting service for hardware distributors and equipment manufacturers. Standard stocked samples can be provided free of charge, buyers only need to bear international shipping costs for sample delivery. |
| Standard Thread Technical Specification | Produced strictly in accordance with DIN7991 UNC metric machine thread standards covering M3-M30. Smooth burr-free thread ensures stable locking and smooth repeated disassembly. |
| Optional Surface Treatment Process | Natural plain original plastic color as standard; customized special colors are supported according to customer color card requirements, no additional coating needed for most plastic materials. |
| Dimensional Tolerance Execution Standard | Adopt ISO 2768-M general mechanical precision tolerance standard. All key dimensions such as head diameter, thread diameter and screw length are controlled within micrometer-level deviation. |
| Anti-Corrosion & Insulation Performance | Excellent resistance to acid, alkali and various chemical solvents; good electrical insulation performance, effectively avoiding short circuit risks in electronic equipment assembly, stable performance in humid chemical environments. |
| Knurl Structure Description | N/A, this countersunk inner hex plastic screw has no anti-slip knurl structure; its locking stability depends on standard inner hex drive and complete machine thread design. |
| Core Product Competitive Advantages | Long-term high temperature resistance, strong acid & alkali corrosion resistance, electrical insulation, lightweight non-magnetic, flat countersunk hidden installation, full M3-M30 metric specifications, DIN7991 standard compliance, support full OEM customization. |
