S-91735A102 4-40 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 with 316 stainless steel construction and passivated finish, ideal for harsh or marine environments
- High mechanical strength with 80,000 psi tensile strength and Rockwell B85 hardness for reliable performance under stress
- Precise thread engagement with Class 2A fit and UNC coarse threads, ensuring easy assembly and vibration resistance
- Full threading design for maximum grip and load distribution across the entire fastener length
- Convenient installation with Phillips No. 1 drive and rounded pan head, reducing slippage and tool wear
- Regulatory compliance meeting ASME B18.6.3, RoHS 3, and REACH standards for safe, quality-assured use
- Durable finish that enhances surface protection and extends service life in demanding applications
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these 4-40 UNC rounded head screws in 316 stainless steel address critical challenges like corrosion, mechanical stress, and assembly efficiency. The passivated finish significantly boosts resistance to chemicals, saltwater, and oxidation, making them ideal for marine, chemical processing, and outdoor equipment. With a coarse thread and Class 2A fit, they provide quick, secure fastening in materials where fine threads might strip, reducing installation time and improving reliability. The fully threaded design ensures uniform load-bearing, while the Phillips drive and pan head offer user-friendly installation without compromising on torque transfer. These screws deliver long-term value in applications requiring high tensile strength and regulatory adherence, from machinery assembly to electronic enclosures.
Specification Summary & Compliance
This 4-40 UNC screw features precise Class 2A thread fit per standard inch measurements, with a length of 1/4" and coarse thread spacing. It is manufactured in compliance with ASME B18.6.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safety and quality for industrial use.
