S-94779A300 4-40 x 3/16" ASME B18.6.3 Stainless Steel Truss Head Phillips Screws
Stainless Steel Truss 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 Black-Oxide coated 18-8 Stainless Steel, ideal for harsh industrial environments
- Enhanced load distribution from the wide truss head design, reducing surface damage and improving joint integrity
- High tensile strength of 70,000 psi ensures reliable performance under demanding mechanical stresses
- Rockwell B70 hardness provides excellent durability and resistance to wear during installation and use
- Full threading along the 3/16" length delivers maximum grip and holding power in various materials
- Precise Class 2A thread fit guarantees smooth assembly and consistent fastening without cross-threading
- Broad compatibility with standard No. 1 Phillips drivers, facilitating quick and secure installation
Professional Applications & Engineering Value
These 4-40 UNC coarse thread screws are engineered to address common challenges in industrial assembly, such as vibration loosening and material fatigue. The Black-Oxide 18-8 Stainless Steel construction offers exceptional corrosion resistance, making them suitable for applications in electronics, automotive, and outdoor equipment where moisture and chemicals are present. The rounded truss head design distributes clamping force over a wider area, minimizing the risk of surface damage on softer materials while providing a low-profile finish. Combined with a Phillips drive and fully threaded body, these screws ensure efficient installation and reliable performance in high-stress environments, reducing maintenance needs and downtime.
Specification Summary & Compliance
This product features a 4-40 UNC coarse thread with Class 2A fit for precise dimensional accuracy and easy assembly. It complies with ASME B18.6.3 manufacturing standards, ensuring consistent quality and performance. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental and safety compliance for global industrial use.
