S-91772A539 1/4"-20 x 5/8" 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
- Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh environments and extended service life
- Exceptional tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration
- Optimized drive engagement with No. 3 Phillips drive for efficient installation and reduced cam-out risk
- Maximum holding power from fully threaded UNC coarse pattern, providing superior grip in various materials
- Precise thread fit with Class 2A tolerance for consistent assembly and reduced cross-threading incidents
- Durable Rockwell B70 hardness maintains thread integrity and resists wear during repeated use
- Comprehensive compliance with ASME B18.6.3, RoHS 3, and REACH ensures safety and regulatory adherence
Professional Applications & Engineering Value
Engineered for demanding industrial applications, this passivated 18-8 stainless steel pan head screw addresses critical challenges in corrosive or high-stress environments. The fully threaded UNC coarse pattern delivers rapid installation and robust clamping force, minimizing loosening in machinery, electrical enclosures, and structural assemblies. Its rounded pan head design with Phillips drive offers a low-profile, flush finish while enabling quick torque application. With 70,000 psi tensile strength and Rockwell B70 hardness, it withstands dynamic loads and repetitive adjustments, reducing maintenance downtime and replacement costs in automotive, marine, and manufacturing sectors.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy and reliable engagement. Manufactured in compliance with ASME B18.6.3 specifications, it ensures consistent quality and interoperability. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for global industrial use.
