S-91802A110 4-40 x 1/2" ASME B18.6.3 Stainless Steel Phillips Oval Head Screws
Stainless Steel Phillips 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 from passivated 18-8 stainless steel construction, ensuring long-term reliability in harsh environments
- Exceptional tensile strength rated at 80,000 psi for secure fastening in demanding applications
- Precision Class 2A thread fit guarantees consistent engagement and reliable installation performance
- Optimized Phillips drive design with No. 1 size provides secure tool engagement and reduces cam-out risk
- Full threading capability enables maximum grip length and uniform stress distribution
- Industry-standard compliance with ASME B18.6.3 ensures dimensional accuracy and interchangeability
- Environmental regulation adherence through RoHS 3 and REACH compliance for global market acceptance
Professional Applications & Engineering Value
These 4-40 UNC oval head Phillips flat head screws deliver critical engineering advantages where corrosion resistance and reliable fastening are paramount. The passivated 18-8 stainless steel construction provides exceptional protection against oxidation and chemical exposure, making them ideal for marine equipment, food processing machinery, and electronic enclosures. The coarse UNC threading ensures rapid installation and superior holding power in various substrates, while the oval head profile creates a finished appearance when countersunk. Engineered with 80,000 psi tensile strength and Rockwell B80 hardness, these fully threaded screws maintain structural integrity under vibration and dynamic loads, solving common failure points in industrial assemblies.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNC coarse threading (4-40 size) and right-hand thread direction. Complies with ASME B18.6.3 dimensional standards, RoHS 3 (2015/863/EU) restrictions on hazardous substances, and REACH (EC 1907/2006) chemical regulations. Features 82° countersink angle for proper seating and fully threaded design for maximum engagement strength.
