S-92949A621 3/8"-16 x 5/8" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws
Stainless Steel Button Head Hex-Drive 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 18-8 stainless steel construction and passivated finish, ideal for harsh environments
- High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing capability
- Precision Class 3A thread fit ensures secure mating and vibration resistance in critical assemblies
- Easy installation and removal with 7/32" hex drive and rounded button head design
- Wide industrial compatibility through UNC coarse threading and full threading along the 5/8" length
- Regulatory compliance meets ASME B18.3 standards and environmental directives (RoHS 3, REACH)
- Durable surface protection from passivation extends service life by preventing oxidation and galling
Professional Applications & Engineering Value
Engineered for demanding industrial settings, this 18-8 stainless steel rounded head screw combines material integrity with precision manufacturing to address common fastening challenges. The passivated finish significantly enhances corrosion resistance, making it suitable for applications exposed to moisture, chemicals, or outdoor conditions. Its 3/8"-16 UNC coarse threading and Class 3A thread fit provide excellent engagement in metals and plastics, reducing the risk of cross-threading while maintaining clamping force under vibration. The hex drive and button head profile allow for efficient installation in confined spaces, offering both aesthetic appeal and functional reliability in machinery, automotive assemblies, and structural frameworks where corrosion-resistant screws are critical to long-term performance.
Specification Summary & Compliance
This fastener maintains Class 3A thread tolerances per UNC standards, ensuring precise fit and interchangeability. Manufacturing and dimensional compliance adhere to ASME B18.3, with full material traceability and environmental conformity to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006). The screw is fully threaded, right-hand oriented, and supplied with coarse thread spacing for optimized installation speed and holding power.
