Stainless Steel ASME/ANSI B18.2.3.1M-2005 Metric hex cap screws

Technical specifications
Thread size: M5 - M100
Pitch: 0.8mm to 6mm
Material: Stainless Steel

Product Overview
Metric hex cap screws conform to internationally recognized dimensional standards.   Their hex heads facilitate reliable torque application using standard wrenches or socket tools, enabling efficient installation and disassembly.   These fasteners are employed across diverse industrial sectors—including mechanical engineering, civil infrastructure, automotive manufacturing, and petrochemical processing.
 
Main functions and advantages

•  Hex head: The hex head is easy to rotate and tighten. The contact area with the tool is increased, and the installation efficiency is improved.
• High strength: Made from high-strength stainless steel and subjected to controlled heat treatment (such as quenching and tempering), these screws feature higher tensile strength, yield strength, hardness, and fatigue resistance - ensuring long-term structural reliability under both dynamic and static load conditions.
• Operational efficiency: Standardized hex heads enable rapid positioning, alignment, reduce assembly time, and minimize the risk of damage caused by cross-threads or tools during installation and maintenance.
• Enhanced environmental resistance: Metric hex cap screws offer powerful protection against oxidation, humidity, salt spray, and mild chemical exposure, providing a reliable service life in demanding indoor and outdoor applications, including Marine, coastal, and industrial atmospheres.

Application

• Mechanical manufacturing: Key joint components for powertrain systems (such as engines, gearboxes, and drive shafts), where dimensional accuracy, consistency of preload, and vibration resistance are crucial for system integrity and service life.
• Automotive industry: Widely used in chassis, body-in-white (BIW), powertrains, and suspension components to meet Oems' strict requirements for safety-critical fastening, crashworthiness,s and thermal cycle durability.
• Construction and infrastructure: Components of structural steel frames, reinforced concrete anchoring systems,s and bolted connections in bridge installation, in compliance with relevant standards (e.g., ASME/ANSI B18.2.3.1M-2005) to ensure load-bearing capacity, ductility, and seismic performance.
• Electronics and precision equipment: Applied in housing assembly, PCB installation, and heat sink fixation, where non-magnetic properties (stainless steel), electrical insulation compatibility, and minimum exhaust (for cleanroom environments) give priority to mechanical stability.