Factory Manufacturer Various Types of Customized Screws Bolt Nuts Tool OEM/ODM Non-Standard Special Fastener with Custom Packaging T

Non-standard fasteners refer to fasteners that deviate from established international or national standards (ANSI, DIN, ISO, GB, JIS). They are modified from standard fastener geometry, with changed thread, length, head shape or dimensions, no official standard drawing to follow. They are usually mass-produced based on custom drawings, commonly used for replacing standard sizes that cannot meet assembly needs.

Grade 4.8: Suitable for non-load-bearing, static, light-load applications: guardrails, brackets, general fasteners, and indoor non-structural connections; not to be used for critical structural joints. Grade 8.8: The most commonly used grade in construction, widely applied for general structural connections, steel frames, equipment base fastenings, and moderate static load conditions. It strikes a balance between cost and performance, making it the preferred choice for most general construction

Grade 10.9: Used for heavy-load steel structural joints, high-preload connections, bridge components, heavy equipment bases, and building assemblies subjected to dynamic loads. Installation torque must be strictly controlled. Grade 12.9: Primarily used in heavy-duty engineering, high-pressure, and high-dynamic-load applications. Rarely used in conventional construction, it is commonly found in heavy machinery, vehicles, and specialized steel structures. Due to the risk of hydrogen embrittlement,