S-91255A207 8-36 x 1/4" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional durability and corrosion resistance thanks to the Black-Oxide finish on Alloy Steel, extending service life in demanding environments.
• Superior load-bearing capability with a high 120,000 psi tensile strength, ensuring reliable performance under high stress.
• Precise and secure fastening achieved with a Class 3A UNF fine thread fit, minimizing the risk of loosening in critical assemblies.
• Easy installation and removal with the 3/32" hex drive and rounded button head design, providing excellent tool engagement and a low-profile finish.
• Consistent performance and reliability from the Rockwell C39 hardness and fully threaded shank, offering uniform strength and holding power.
• Broad industrial compatibility as the right-hand thread direction and standard rounded head profile suit a wide range of machinery and equipment.
• Guaranteed quality and safety through compliance with ASME B18.3 and ASTM F835 standards, along with RoHS 3 and REACH environmental regulations.

Professional Applications & Engineering Value

Engineered for precision and endurance, these 8-36 UNF Class 3A Black-Oxide Alloy Steel Rounded Head Screws address common industrial challenges such as vibration-induced loosening and environmental wear. The fine thread spacing and Class 3A fit ensure tight, secure connections in applications like automotive assemblies, electronic enclosures, and heavy machinery, where minute adjustments and high tensile loads are critical. The Black-Oxide surface treatment enhances corrosion resistance, reducing maintenance needs in humid or chemically exposed settings. Combined with the fully threaded design and hex drive compatibility, these screws deliver consistent clamping force and easy installation, making them ideal for precision screws in OEM and MRO operations that demand reliability and regulatory adherence.

Specification Summary & Compliance

This product maintains precise dimensional accuracy with a Class 3A thread fit and UNF fine thread specifications, ensuring high interchangeability and performance. Manufacturing adheres to ASME B18.3 and ASTM F835 standards, guaranteeing consistent quality. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and sustainable industrial use.