S-91223A218 1/4"-20 x 3/4" 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments and chemical exposure.
• Exceptional strength and durability with 70,000 psi tensile strength and Rockwell B70 hardness for reliable, long-lasting fastening.
• Space-saving ultra-low profile head allows for installation in tight or recessed spaces without compromising performance.
• Precise and reliable engagement with Class 2A thread fit and coarse UNC threads for easy alignment and reduced cross-threading risk.
• Secure hex drive operation using a 1/8" hex key, providing high torque transfer and minimizing tool slippage.
• Full thread coverage along the 3/4" length ensures maximum grip and uniform clamping force across the entire fastener.
• Compliance with strict environmental regulations, including RoHS 3 and REACH, for use in regulated industries and global markets.

Professional Applications & Engineering Value

This 316 Stainless Steel Socket Head Cap Screw is engineered to address critical challenges in precision machinery, marine equipment, and chemical processing applications. Its ultra-low profile head and coarse 1/4"-20 UNC threads provide a compact yet robust fastening solution where space is limited and vibration resistance is paramount. The corrosion-resistant material ensures longevity in humid, saline, or chemically aggressive environments, reducing maintenance frequency and failure risks. Combined with a Class 2A thread fit and 70,000 psi tensile strength, it delivers consistent clamping force and reliable performance in high-stress assemblies, making it an essential component for OEMs and MRO professionals seeking durability and regulatory compliance.

Specification Summary & Compliance

This socket head cap screw adheres to inch system measurements with a Class 2A thread fit for standard clearance and assembly ease. It conforms to UNC coarse thread standards and is manufactured as a fully threaded fastener. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety requirements for hazardous substance restrictions.