Through Hole Hex Socket Internal External Thread Nut For Fastening Lighting And Furniture
The through-hole hexagon socket internal & external thread nut is a precision fastener integrating hexagon socket drive, axial penetration, and internal & external thread conversion functions. It realizes rigid connection of different components through specification adaptation of threads at both ends, and is widely used in mechanical transmission and equipment assembly scenarios requiring concealed fastening and reducing butt joint. Its structural design combines the dual advantages of high-strength fastening and flexible adaptation, making it a key component in industrial connections for solving specification mismatch problems.
| Parameter Category | Specific Parameters | Detailed Description |
|---|---|---|
| Execution Standard and Grade | Standard Basis | Complies with GB/T 5787 (General Specification for Hexagon Socket Fasteners) and thread standard GB/T 192, compatible with metric thread series. |
| Product Grade | Grade A precision with thread tolerance 6H (internal)/6g (external), across flats tolerance ±0.2mm, and length tolerance ±0.3mm. | |
| Strength Grade | High strength of 8.8/10.9 grade; tensile strength ≥800MPa (for 8.8 grade), yield strength ≥640MPa, meeting medium and above load requirements. | |
| Material and Surface Treatment | Base Material | 45# carbon steel (for 8.8 grade), 35CrMo alloy steel (for 10.9 grade), 304 stainless steel (for anti-corrosion scenarios). |
| Surface Treatment | Electro-galvanizing (zinc layer: 8-12μm, salt spray test ≥48h); chrome plating (hardness ≥800HV, wear-resistant and aesthetic); stainless steel passivation (improving corrosion resistance). | |
| Thread Specifications | Internal Thread Specification | Metric M5-M20 (e.g., M8*1.25), with depth ≥1.5 times thread diameter, ensuring effective engagement length. |
| External Thread Specification | Metric M6-M22 (e.g., M10*1.5), customizable for reducing conversion (e.g., internal M8→external M10) to adapt to different female part requirements. |
Installation Points: Use hexagon socket wrench of matching specification (avoid forced twisting with wrench plus sleeve). Tighten according to recommended torque (28N・m for M10 8.8 grade), ensuring complete thread engagement (engagement length ≥ thread diameter).
Maintenance Notes: Regularly check for thread slipping and rust. For galvanized parts with local rust, clean promptly and touch up with anti-rust agent; for stainless steel parts, avoid direct contact with carbon steel to prevent electrochemical corrosion.
With its precise specification conversion capability, high-strength fastening performance and concealed installation advantages, the through-hole hexagon socket internal & external thread nut provides an efficient and reliable solution for industrial reducing connection scenarios, and is an indispensable precision fastener in mechanical manufacturing, automated equipment and other fields.