S-91790A115 4-40 x 3/4" ASME B18.6.3 Stainless Steel Slotted Oval Head Screws
Stainless Steel Slotted Oval Head 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 passivated finish, ensuring long-term reliability in harsh environments.
- Exceptional mechanical strength offering 80,000 psi tensile strength and Rockwell B80 hardness for secure, vibration-resistant fastening.
- Precision threading with Class 2A fit and UNC coarse threads for quick, easy installation and reduced cross-threading risks.
- Optimized head design featuring a standard oval profile and slotted drive for a flush finish and straightforward tool engagement.
- Full threading along the 3/4" length provides maximum grip and uniform load distribution across the entire fastener.
- Compliance with industry standards including ASME B18.6.3, ensuring dimensional accuracy and interchangeability.
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements.
Professional Applications & Engineering Value
These 4-40 UNC oval head slotted screws are engineered to address critical industrial challenges, such as corrosion-induced failure and assembly inefficiency. Made from 18-8 stainless steel with a passivated finish, they resist oxidation and chemical exposure, making them ideal for applications in marine, food processing, and outdoor equipment. The coarse UNC thread and Class 2A fit enable rapid installation with standard tools, reducing labor time while maintaining tight tolerances. The oval head design sits flush with surfaces, minimizing protrusion in assemblies where space and aesthetics are concerns. With a high 80,000 psi tensile strength, these screws provide dependable performance in high-stress environments, ensuring joint integrity and reducing maintenance needs.
Specification Summary & Compliance
These screws feature a 4-40 UNC thread size with Class 2A thread fit for precise dimensional accuracy per ASME B18.6.3 standards. They are fully threaded with a length of 3/4" and include an 82° countersink angle for proper seating. Compliance is assured with ASME B18.6.3 for mechanical specifications, RoHS 3 (2015/863/EU) for restricted substances, and REACH (EC 1907/2006) for chemical safety, supporting use in regulated industries.
