S-94792A321 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 316 stainless steel construction and passivated finish, ideal for harsh environments and chemical exposure
- Enhanced load distribution from the wide truss head design, reducing surface pressure and preventing material damage
- High tensile strength of 100,000 psi ensures reliable performance under heavy mechanical stress and vibration
- Quick installation and removal with Phillips No. 1 drive and coarse UNC threads, saving time in assembly lines
- Consistent thread engagement through Class 2A fit and full threading, providing secure fastening in various materials
- Compliance with industry standards including ASME B18.6.3, RoHS, and REACH, ensuring safety and regulatory acceptance
- Durable Rockwell B100 hardness maintains integrity over repeated use, reducing replacement costs
Professional Applications & Engineering Value
These 4-40 UNC rounded truss head screws are engineered to address common industrial challenges like corrosion, vibration loosening, and assembly efficiency. The 316 stainless steel material, combined with a passivated finish, provides exceptional resistance to oxidization and chemicals, making them suitable for marine, chemical processing, and outdoor equipment. The wide truss head offers a larger bearing surface, distributing clamp load effectively to prevent damage to soft materials or painted surfaces. With a coarse thread and Phillips drive, they enable faster driving in production environments, reducing labor time while maintaining Class 2A thread fit precision. Ideal for securing panels, electronic enclosures, and machinery components, these screws deliver reliability in demanding applications where strength and environmental compliance are critical.
Specification Summary & Compliance
This product adheres to Class 2A thread fit tolerances under the UNC (Unified Coarse) thread standard, ensuring dimensional accuracy and interchangeability. Manufacturing follows ASME B18.6.3 specifications for consistency and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, these screws meet environmental and safety standards for global industrial use.
