S-91249A541 1/4"-20 x 3/4" 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 with 18-8 stainless steel construction and black-oxide coating for extended service life in harsh environments
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration
- Class 2A thread fit provides consistent engagement and easier assembly while maintaining secure fastening
- Phillips No. 3 drive design offers efficient torque transfer and reduced cam-out during installation
- Rounded pan head profile delivers low-profile appearance with excellent bearing surface for secure clamping
- Full threading along entire shank enables maximum grip length and versatile positioning in various applications
- Rockwell B70 hardness maintains thread integrity and prevents stripping during repeated use
Professional Applications & Engineering Value
This black-oxide 18-8 stainless steel rounded head screw addresses critical industrial fastening challenges where corrosion resistance and structural integrity are paramount. The combination of 70,000 psi tensile strength and Rockwell B70 hardness ensures reliable performance in high-stress applications, from machinery assembly to structural frameworks. The UNC coarse threading with Class 2A fit provides quick installation and secure holding power, while the Phillips No. 3 drive facilitates efficient assembly in automated or manual production environments. The black-oxide surface treatment enhances both corrosion protection and aesthetic appeal, making these fully threaded screws ideal for OEM manufacturing, maintenance operations, and equipment requiring durable industrial fasteners that withstand demanding conditions.
Specification Summary & Compliance
Manufactured to exacting ASME B18.6.3 standards with precision UNC 1/4"-20 threading and Class 2A thread fit tolerances. This 3/4" length screw features consistent dimensional accuracy throughout production. Fully compliant with RoHS 3 (2015/863/EU) environmental directives and REACH (EC 1907/2006) regulations, ensuring safe use across various industrial sectors while meeting international quality and environmental standards.
