S-90008A461 4-40 x 3/4" ASME B18.3, ASTM F837 18-8 Stainless Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with silver-plated 18-8 stainless steel construction for long-lasting performance in harsh environments
• Superior thread engagement through Class 3A thread fit ensuring precise assembly and vibration resistance
• High tensile strength of 70,000 psi provides reliable load-bearing capacity for critical applications
• Rockwell B70 hardness maintains structural integrity under repeated stress and torque
• Hex socket drive design allows for secure tool engagement and high-torque installation
• Full thread coverage along the 3/4" length enables consistent clamping force distribution
• Compliance with multiple industry standards including ASME B18.3, RoHS 3, and REACH for guaranteed quality and safety

Professional Applications & Engineering Value

These silver plated 18-8 stainless steel socket head cap screws deliver critical performance advantages in demanding industrial environments. The 4-40 UNC coarse thread configuration combined with Class 3A thread fit ensures rapid assembly with minimal cross-threading risk, while maintaining vibration resistance in dynamic applications. The hex drive socket head provides superior torque transmission for high-clamp-force requirements without stripping. Engineered for corrosion-resistant applications including marine equipment, chemical processing, and electronic enclosures, these fasteners overcome common failure points through their 70,000 psi tensile strength and Rockwell B70 hardness, ensuring long-term reliability in temperature-fluctuating and corrosive environments where fastener integrity is non-negotiable.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with precision Class 3A thread fit and UNC coarse thread spacing. These 4-40 thread size screws feature 3/4" length with fully threaded design in the inch system. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets. The right-hand thread direction and standard socket head profile maintain compatibility with industry-standard installation tools and procedures.