For most mechanical components, SUS304 and SUS316 can satisfy the majority of requirements. As a result, many people assume: "As long as it's stainless steel, it should be good enough." However, in certain advanced equipment and demanding environments, engineers often discover that even stainless steel components can still suffer from: High-temperature deformation Loss of strength Corrosion failure Long-term fatigue damage Chemical attack At this point, material selection is

When selecting stainless steel materials for components, many people first focus on corrosion resistance. However, for mechanical parts, the characteristics of the material itself often have a greater impact on machining methods, service life, and overall cost. Particularly in dowel pins, shafts, cutting tools, screws, and precision components, both 416 and 440C are common stainless steel grades. However, their intended applications are fundamentally different. Some products

In dowel pin applications, most people first focus on dimensions, tolerances, or materials. However, in real-world assembly, the details that truly affect installation feel and service life are often the most overlooked parts — the pin ends. Some dowel pins slide smoothly into holes with little effort, while others tend to jam, scratch the hole surface, or even require rework or hole re-machining. In many cases, these issues are not caused by dimensional errors, but by differ

Metric and Imperial In hardware parts, machining, and equipment maintenance, it’s common to encounter a confusing situation: you only want to find a screw or a pin, yet the specifications appear in two completely different formats — one written as M4, M6, M8 (metric), and another as 1/4"-20 or #8-32 (imperial). Many people wonder:“Why aren’t these specifications unified?”“Since they look similar, can they substitute for each other?” The answer is: No.Metric and imperial syste