S-91772A537 1/4"-20 x 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
- Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh environments and extended service life
- High mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing in demanding applications
- Precise Class 2A thread fit ensures smooth assembly and secure fastening, reducing the risk of cross-threading and installation errors
- Optimized Phillips No. 3 drive provides efficient torque transfer and reduces cam-out, speeding up installation in high-volume production
- Fully threaded UNC coarse design delivers maximum grip and holding power across the entire length for robust connections
- Compliant with ASME B18.6.3 and environmental regulations (RoHS 3, REACH), ensuring quality, safety, and regulatory acceptance
- Durable pan head profile with standard rounded design offers a low-profile finish and consistent seating in pre-drilled holes
Professional Applications & Engineering Value
Engineered for industrial and mechanical assemblies, this 1/4"-20 x 1/2" passivated 18-8 stainless steel pan head screw addresses critical needs for corrosion resistance and structural integrity. The UNC coarse thread and fully threaded design provide excellent engagement in metals and plastics, preventing loosening under vibration. With a Phillips drive and Class 2A thread fit, it ensures quick, reliable installation in automated or manual settings, reducing downtime. Its 70,000 psi tensile strength and Rockwell B70 hardness make it suitable for machinery, enclosures, and equipment where durability and compliance with ASME B18.6.3 are paramount.
Specification Summary & Compliance
This screw adheres to Class 2A thread fit tolerances and UNC coarse thread standards, with dimensions including a 1/4"-20 thread size and 1/2" length. Manufactured to ASME B18.6.3 specifications, it ensures precision and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), meeting environmental and safety requirements for industrial use.
