S-97181A101 4-40 x 1/4" ASME B18.6.3 Stainless Steel Pan Head Combination Phillips/Slotted Screws
Stainless Steel Pan Head Combination Phillips/Slotted 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 316 stainless steel construction and passivated finish, ideal for harsh environments and extended service life
- High mechanical strength offering 100,000 psi tensile strength and Rockwell B100 hardness for reliable performance under stress
- Versatile drive compatibility featuring combined Phillips/Slotted drive (No. 1 size) for flexible installation with common tools
- Precise thread engagement with Class 2A UNC coarse threads ensuring consistent fit and reduced cross-threading risks
- Optimized head design with rounded pan profile providing a low-profile, secure fastening with improved aesthetics
- Full threading along the 1/4" length enables maximum grip and adjustability in various material thicknesses
- Regulatory compliance assurance meeting ASME B18.6.3, RoHS 3, and REACH standards for quality and environmental safety
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these 4-40 UNC rounded head screws in 316 stainless steel address critical challenges like corrosion in marine, chemical, and outdoor applications. The passivated finish enhances surface durability, resisting oxidation and chemical exposure, while the coarse thread design ensures quick assembly and secure holding in softer materials or where vibration is a concern. The combination of Phillips/Slotted drive offers installation flexibility, reducing tooling constraints in tight spaces. Ideal for machinery, electronic enclosures, and structural components, these screws provide long-term reliability, minimizing maintenance and replacement costs in high-tensile strength scenarios.
Specification Summary & Compliance
This product adheres to Class 2A thread fit per UNC standards, ensuring dimensional accuracy and interchangeability. Manufacturing complies with ASME B18.6.3 specifications for consistent quality. Environmental and safety regulations are met, including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming suitability for global markets and restricted substance-free usage.
