S-91249A126 4-40 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 Black-Oxide coated 18-8 Stainless Steel, ideal for harsh environments and long-term reliability.
- Superior tensile strength of 70,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
- Rockwell B70 hardness provides excellent durability and resistance to wear, extending the screw's service life.
- Fully threaded design offers maximum grip and holding power along the entire shank for secure fastening.
- Class 2A thread fit with UNC coarse threading allows for easier, faster assembly and reduces cross-threading risks.
- Pan head with Phillips No. 1 drive facilitates straightforward installation with common tools, improving assembly efficiency.
- Compliance with ASME B18.6.3, RoHS 3, and REACH ensures adherence to industry standards and environmental safety regulations.
Professional Applications & Engineering Value
These 4-40 UNC coarse thread screws are engineered to address common industrial challenges, such as vibration loosening and corrosion-induced failures. The Black-Oxide 18-8 Stainless Steel construction provides a protective layer that significantly enhances corrosion resistance, making these pan head screws suitable for outdoor, marine, and chemical-exposed applications. With a fully threaded design and 70,000 psi tensile strength, they deliver consistent clamping force and reliability in assemblies requiring high load-bearing capacity. The Phillips drive and rounded head profile ensure easy installation and a flush finish, reducing assembly time and improving overall productivity in machinery, electronics, and automotive sectors.
Specification Summary & Compliance
This screw features precise Class 2A thread fit and UNC coarse threads for accurate engagement and ease of use. It meets ASME B18.6.3 specifications for dimensional consistency and performance. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global markets.
