S-91785A108 4-40 x 3/8" ASME B18.6.3 Stainless Steel Truss Head Slotted Screws
Stainless Steel Truss Head Slotted 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
- Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish for long-lasting performance in harsh environments
- Superior load-bearing capability with 100,000 psi tensile strength and Rockwell B100 hardness for reliable fastening in demanding applications
- Optimized installation efficiency through fully threaded UNC coarse design and Class 2A thread fit for quick, secure assembly
- Enhanced surface contact and stability with wide rounded truss head profile distributing pressure across broader surface areas
- Compliance with industry standards including ASME B18.6.3 specifications for consistent quality and dimensional accuracy
- Environmental regulation adherence with RoHS 3 and REACH compliance for safe, sustainable manufacturing practices
- Versatile drive compatibility featuring slotted drive style for broad tool accessibility in various industrial settings
Professional Applications & Engineering Value
Engineered for precision industrial assemblies, these 4-40 UNC rounded truss head screws deliver critical solutions where corrosion resistance and structural integrity are paramount. The 18-8 stainless steel composition with passivated finish provides exceptional protection against oxidation and chemical exposure, making them ideal for electronics enclosures, marine equipment, and food processing machinery. The wide truss head design significantly increases bearing surface, preventing surface damage while maintaining secure fastening under vibration. With fully threaded coarse UNC threading and Class 2A fit, these screws ensure rapid installation and reliable performance in right-hand threading applications across automotive, aerospace, and industrial manufacturing sectors where dimensional precision and regulatory compliance are non-negotiable.
Specification Summary & Compliance
Manufactured to exacting ASME B18.6.3 specifications with Class 2A thread fit for consistent dimensional accuracy. Features 4-40 UNC coarse threads with right-hand direction and full threading along the 3/8" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring adherence to international safety and sustainability standards for industrial fastener applications.
