S-91772A030 3-56 x 1/4" 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 from passivated 18-8 stainless steel construction, ensuring long-term reliability in harsh environments
- Exceptional tensile strength rated at 70,000 psi for secure fastening in high-stress applications
- Precision fine threading with UNF 3-56 specification and Class 2A fit for vibration-resistant, secure connections
- Optimized drive performance with Phillips No. 1 drive style providing efficient installation and reduced cam-out risk
- Full threading design offering maximum engagement length and consistent clamping force distribution
- Industry compliance assurance meeting ASME B18.6.3 standards and environmental regulations including RoHS 3 and REACH
- Enhanced durability with Rockwell B70 hardness maintaining structural integrity under repeated use
Professional Applications & Engineering Value
These 3-56 UNF fine thread pan head screws deliver critical performance advantages in precision engineering applications where corrosion resistance and reliable fastening are paramount. The passivated 18-8 stainless steel construction prevents oxidation and chemical degradation, making them ideal for electronics enclosures, medical devices, marine equipment, and aerospace components. The fine thread configuration provides superior vibration resistance compared to coarse threads, while the pan head design with Phillips drive ensures flush mounting and efficient installation in confined spaces. This combination addresses common industrial challenges including material compatibility, environmental exposure, and maintenance reduction requirements.
Specification Summary & Compliance
Manufactured to exacting Class 2A thread fit tolerances with UNF 3-56 fine threading and right-hand thread direction. Complies with ASME B18.6.3 mechanical standards for dimensional accuracy and performance. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) requirements for restricted substances. Features include 1/4" length, 0.193" head diameter, and fully threaded design for consistent mechanical properties throughout the fastener.
