S-91249A109 4-40 x 7/16" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh industrial environments
• High tensile strength of 70,000 psi ensures reliable load-bearing capacity and joint integrity under stress
• Rockwell B70 hardness provides excellent wear resistance and durability for long service life
• Class 2A thread fit with UNC coarse threading enables quick assembly and secure fastening in various materials
• Fully threaded design offers maximum grip and uniform stress distribution along the entire length
• Pan head with Phillips No. 1 drive allows for easy installation and removal with standard tools
• Compliance with ASME B18.6.3, RoHS, and REACH ensures quality, safety, and environmental standards are met

Professional Applications & Engineering Value

These 4-40 UNC coarse thread screws are engineered with Black-Oxide 18-8 Stainless Steel to address common industrial challenges such as corrosion, vibration loosening, and mechanical fatigue. The rounded pan head and Phillips drive facilitate efficient installation in confined spaces, while the coarse UNC threading provides superior holding power in soft materials and reduces cross-threading risks. Ideal for electronics assembly, machinery, and automotive components, these screws maintain consistent performance in demanding applications, ensuring reliable fastening and reduced maintenance cycles.

Specification Summary & Compliance

This product features precise Class 2A thread fit per UNC standards, with dimensions including 7/16" length and 0.219" head diameter. Manufactured in accordance with ASME B18.6.3 specifications, it guarantees dimensional accuracy and interoperability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), it meets stringent environmental and safety regulations for global industrial use.