S-91737A072 4-40 x 1/4" 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 and passivated finish, ideal for harsh environments
- High tensile strength of 80,000 psi ensures reliable, long-lasting fastening under demanding loads
- Excellent thread engagement with UNC coarse threading and Class 2A fit for quick assembly and vibration resistance
- Optimized drive performance using a Phillips No. 1 drive and rounded fillister head for secure, flush installation
- Full compliance with industry standards including ASME B18.6.3, RoHS 3, and REACH for guaranteed quality and safety
- Consistent hardness (Rockwell B85) provides durability and resistance to wear over repeated use
- Fully threaded design offers maximum grip and holding power across the entire 1/4" length
Professional Applications & Engineering Value
This 4-40 UNC Rounded Fillister Head Phillips Screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and assembly efficiency. Made from 18-8 Stainless Steel with a passivated finish, it resists rust and chemical exposure, making it suitable for electronics, machinery, and outdoor equipment. The coarse UNC thread and Class 2A fit ensure easy alignment and secure fastening, reducing installation time and maintenance needs. Its rounded fillister head and Phillips drive allow for a low-profile, tamper-resistant connection, ideal for applications where space and reliability are critical. With high tensile strength and full threading, this screw delivers consistent performance in industrial fastening and assembly lines.
Specification Summary & Compliance
This screw features precise Class 2A thread fit and UNC coarse threading with a diameter of 0.112" and length of 1/4". It is manufactured in accordance with ASME B18.6.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.
