S-91737A315 1/4"-20 x 1 1/2" ASME B18.6.3 Stainless Steel Fillister Head Phillips Screws
Stainless Steel Fillister 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 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
- Exceptional tensile strength rated at 80,000 psi for reliable performance in demanding applications
- Precision Class 2A thread fit ensures smooth installation and secure fastening in UNC coarse threaded components
- Optimized drive engagement with No. 3 Phillips drive and fillister head design for efficient torque transfer
- Full threading along 1-1/2" length provides maximum grip and load distribution across the entire fastener
- High hardness rating (Rockwell B85) maintains thread integrity and prevents stripping during repeated use
- Comprehensive compliance with ASME B18.6.3 standards and environmental regulations including RoHS 3 and REACH
Professional Applications & Engineering Value
These 1/4"-20 UNC fully threaded screws deliver critical performance advantages in industrial machinery, automotive assemblies, and marine equipment where corrosion resistance and structural integrity are paramount. The combination of 18-8 stainless steel material with passivated finish creates a protective barrier against chemical exposure and atmospheric corrosion, significantly extending service life in challenging environments. The rounded fillister head with Phillips drive provides a low-profile solution that accommodates counterbored applications while ensuring positive driver engagement. With coarse threading and Class 2A fit, these fasteners resist vibration loosening and maintain clamping force in high-stress applications, making them ideal for heavy-duty industrial screws requiring reliable, long-term performance.
Specification Summary & Compliance
This 1/4"-20 x 1-1/2" rounded head screw features precision UNC coarse threads with Class 2A tolerance for consistent fit and performance. Manufactured to ASME B18.6.3 specifications with complete full threading along the entire shank length. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors while maintaining the mechanical properties required for demanding applications.
