S-95362A141 1/4"-20 x 2" ASME B18.2.1, SAE J429, ASTM A354BD, MS90728-14 Mil. Spec. High-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 psi ensures reliable performance under extreme loads, reducing the risk of fastener failure in critical applications.
• Superior corrosion resistance from zinc yellow-chromate plating extends service life, even in harsh or outdoor environments.
• High hardness rating (Rockwell C33) provides excellent wear resistance and maintains thread integrity during repeated installations.
• Coarse UNC threading allows for quicker assembly and better performance in materials prone to debris or vibration.
• External hex drive design offers secure tool engagement for high-torque applications, minimizing stripping and improving installation efficiency.
• Partial threading provides an unthreaded shank for enhanced shear strength and precise clamping in structural joints.
• Compliance with major industry standards (ASME B18.2.1, SAE J429, ASTM A354BD) guarantees consistent quality and interchangeability.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered for demanding industrial applications where failure is not an option. The steel material and Rockwell C33 hardness provide exceptional durability against vibrational loosening and mechanical stress, common in heavy machinery, construction equipment, and automotive assemblies. The zinc yellow-chromate plating offers a robust barrier against corrosion, making it suitable for outdoor or humid environments without compromising on 150,000 psi tensile strength. With its 1/4"-20 UNC coarse thread and partial threading, it ensures rapid installation and reliable grip in both metal and composite materials, reducing assembly time while maintaining joint integrity under dynamic loads.

Specification Summary & Compliance

This fastener adheres to Class 2A thread fit for consistent engagement and meets ASME B18.2.1, SAE J429, and ASTM A354BD specifications for dimensional accuracy and mechanical properties. It is REACH (EC 1907/2006) compliant, ensuring it is free from hazardous substances, and conforms to MS90728-14 for reliable performance in aerospace and defense applications. The inch system measurements and external hex drive provide compatibility with standard tools and existing assemblies.