S-90909A522 10-32 x 1/2" Stainless Steel Flanged Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel and passivated finish, ideal for harsh chemical and marine environments.
• Exceptional thread precision with Class 3A UNF fine threading ensures secure, vibration-resistant fastening in critical assemblies.
• High mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance under heavy loads.
• Integrated flange design distributes load evenly, eliminating the need for separate washers and speeding up installation.
• Easy installation and removal with 1/8" hex drive, providing a firm grip and reducing the risk of stripping during torque application.
• Full threading along the 1/2" length allows for maximum adjustability and holding power in various material thicknesses.
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe use in regulated industrial sectors.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these 316 stainless steel rounded head screws with 10-32 UNF Class 3A fine threading address common challenges like corrosion-induced failure and loosening under vibration. The passivated finish enhances the innate corrosion resistance of 316 stainless steel, making these screws ideal for chemical processing, marine equipment, and food machinery where exposure to moisture and aggressive substances is frequent. The flanged button head design provides a low-profile, wide bearing surface that minimizes surface damage and distributes clamping force effectively, reducing the risk of material deformation. Combined with fully threaded construction and hex drive, they ensure quick, secure installations in tight spaces, supporting efficient maintenance and assembly workflows in industrial applications requiring high durability and reliability.

Specification Summary & Compliance

This screw features precise 10-32 UNF fine threads with Class 3A fit for high accuracy and minimal backlash. Dimensions include a 1/2" length, 0.406" flange diameter, and 0.19" thread diameter. Manufactured from 316 stainless steel with a passivated finish, it meets mechanical properties of 70,000 psi tensile strength and Rockwell B70 hardness. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring adherence to environmental and safety standards for industrial use.