S-91249A386 5/16"-18 x 1 1/2" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws
Stainless Steel Pan Head Phillips Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional corrosion resistance with 18-8 stainless steel and black-oxide coating, ideal for harsh environments and reducing replacement costs.
- High tensile strength of 70,000 psi ensures reliable load-bearing capacity and joint integrity under stress.
- Rockwell B70 hardness provides excellent wear resistance, maintaining fastener performance over repeated use.
- Fully threaded UNC coarse spacing offers quick installation and superior holding power in various materials.
- Class 2A thread fit guarantees consistent, precise engagement for smooth assembly and reduced cross-threading risks.
- Pan head with Phillips No. 4 drive allows for easy driving with standard tools and a low-profile, rounded design.
- Compliance with ASME B18.6.3, RoHS 3, and REACH ensures adherence to industry standards and environmental safety regulations.
Professional Applications & Engineering Value
This black-oxide 18-8 stainless steel pan head screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and assembly efficiency. The fully threaded UNC coarse spacing enables rapid installation in metals, plastics, and wood, while the Class 2A thread fit minimizes the risk of stripping during high-torque applications. With a tensile strength of 70,000 psi and Rockwell B70 hardness, it provides durable fastening for machinery, automotive components, and electrical enclosures, reducing maintenance downtime. The black-oxide coating enhances aesthetics and adds an extra layer of protection against oxidation, making it suitable for outdoor or chemically exposed settings where reliability is critical.
Specification Summary & Compliance
This screw features a 5/16"-18 UNC thread with Class 2A fit for precise dimensional accuracy and coarse spacing to improve grip. It meets ASME B18.6.3 specifications for dimensional and mechanical requirements, ensuring consistent performance. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for hazardous substances.
