S-90920A272 4-40 x 3/8" ASME B18.6.3 Alloy Steel Torx Flat Head Screws
Alloy Steel Torx Flat Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments
- Enhanced torque transmission and reduced cam-out through precision T8 Torx drive design for reliable installation
- High tensile strength rating of 60,000 psi ensures dependable performance under mechanical stress
- Optimized flush mounting with standard 82° countersink angle and flat head profile for seamless surface integration
- Consistent threading performance with Class 2A thread fit and UNC coarse spacing for rapid assembly
- Full threading along 3/8" length provides maximum grip and load distribution across applications
- Compliance with major industry standards including ASME B18.6.3 and environmental regulations
Professional Applications & Engineering Value
These 4-40 UNC flat head screws deliver exceptional engineering value through their zinc-plated steel construction and Torx T8 drive system. The combination addresses critical industrial challenges including corrosion prevention in harsh environments and stripped fastener heads during high-torque applications. The coarse thread spacing and Class 2A thread fit ensure rapid installation while maintaining precision alignment in machinery, electronics, and automotive assemblies. The 82° countersink angle provides flush mounting for applications where surface protrusion is unacceptable, while the fully threaded design maximizes engagement in thin materials. These industrial fasteners solve vibration-induced loosening and corrosion-related failure points common in manufacturing equipment.
Specification Summary & Compliance
Manufactured to exacting ASME B18.6.3 specifications with Class 2A thread fit tolerances ensuring consistent performance. The UNC coarse thread profile provides reliable engagement in various materials. These screws maintain compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making them suitable for global industrial applications. The dimensional accuracy includes precise 3/8" length, 0.212" head diameter, and standardized 82° countersink angle for uniform installation across assemblies.
