S-91772A108 4-40 x 3/8" 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 passivated 18-8 stainless steel construction, ideal for harsh industrial environments
- High tensile strength of 70,000 psi ensures reliable fastening under significant mechanical stress
- Class 2A thread fit provides consistent, smooth assembly and reduces cross-threading risks
- Phillips No. 1 drive design offers efficient torque transfer and reduces cam-out during installation
- Fully threaded 4-40 UNC coarse spacing delivers maximum grip and holding power across the entire length
- Rounded pan head profile combines low-profile aesthetics with practical screwdriver clearance
- Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards
Professional Applications & Engineering Value
This 4-40 UNC fully threaded screw is engineered to address critical fastening challenges in industrial settings. The passivated 18-8 stainless steel material provides excellent resistance to oxidation and chemical exposure, making it suitable for applications in electronics, machinery, and outdoor equipment where moisture or corrosive agents are present. The coarse thread spacing and Class 2A thread fit ensure quick, secure installation even in materials prone to stripping, while the Phillips No. 1 drive allows for efficient high-torque assembly with standard tools. Its 70,000 psi tensile strength and Rockwell B70 hardness offer dependable performance in high-vibration environments, reducing maintenance needs and enhancing operational reliability.
Specification Summary & Compliance
This screw features precision 4-40 UNC threads with Class 2A fit and coarse spacing, ensuring dimensional accuracy per industry standards. It is manufactured in compliance with ASME B18.6.3 specifications for mechanical and dimensional requirements. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for hazardous substances.
