Release time：2020-01-16 18:44 Browse：
Long screws generally do not require full threading. A partially threaded design (with a non-threaded shank section) improves tensile strength, reduces stress concentration, and prevents loosening caused by thread wear, making it more suitable for dynamic loads or pre-tightening scenarios.
Introduction:
The thread design of long screws must balance strength and functionality. Fully threaded screws, with dense threading, may lead to:
Stress Concentration: Thread roots create weak points prone to fracture under long-term use.
Uneven Preload: High friction from full threading affects tightening accuracy.
Reduced Shank Strength: Lack of a smooth shank lowers tensile performance.
Partially threaded long screws (e.g., bolted connections) distribute load through the shank, making them ideal for high-strength applications in construction and machinery. Selection should consider specific load and installation conditions.
