S-90729A311 10-32 x 1/2" Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 316 stainless steel and passivated finish, ideal for harsh chemical and marine environments.
• Exceptional thread reliability with Class 3A UNF fine threading, ensuring precise, vibration-resistant fits in critical assemblies.
• High mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for demanding load-bearing applications.
• Optimized flush mounting featuring a 100° countersink angle and undercut flat head profile for a secure, non-protruding installation.
• Efficient installation and removal using a 3/32" hex drive, providing superior torque transfer and reduced tool slippage.
• Full regulatory compliance with RoHS 3 and REACH, guaranteeing safety and environmental standards for global supply chains.
• Maximum grip and holding power from being fully threaded along the 1/2" length, distributing clamp force evenly.

Professional Applications & Engineering Value

This 10-32 UNF Flat Head Screw is engineered to solve critical challenges in precision industries. The 316 Stainless Steel construction, combined with a passivated finish, provides outstanding resistance to chlorides and acidic conditions, preventing failure in chemical processing, marine hardware, and food-grade equipment. The Class 3A thread fit and fine thread spacing deliver superior fatigue resistance and clamping force retention in high-vibration environments like aerospace assemblies and automotive subsystems. The undercut flat head and 100° countersink angle ensure a flush, secure fit that minimizes stress concentrations, making it ideal for machined surfaces and sheet metal applications where surface integrity is paramount.

Specification Summary & Compliance

This screw adheres to UNF (Unified National Fine) thread standards with a Class 3A tolerance for high-precision fits. Key dimensional specifications include a thread size of 10-32, a length of 1/2", a head diameter of 0.411" (tolerance: -0.01" to 0"), and a drive size of 3/32" hex. The product is manufactured to comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for use in regulated markets.