S-90291A872 3/8"-24 ASME B18.3 Set Screws
Set Screws
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Basic Information
Head Parameters
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
Installation & Application
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Key Features & Benefits at a Glance
- Vibration-resistant nylon tip prevents loosening under dynamic loads, ensuring secure fastening in high-motion applications.
- Corrosion-resistant 18-8 stainless steel construction offers excellent durability in harsh or humid industrial environments.
- Precision Class 3A thread fit provides tighter tolerances for improved assembly accuracy and reduced risk of cross-threading.
- Wide temperature tolerance (-50° to 250°F) allows reliable performance in both extreme cold and moderate heat conditions.
- Hex headless design with 3/16" drive enables easy installation in confined spaces using standard Allen keys.
- Fine UNF threads deliver superior holding power and resistance to vibrational loosening compared to coarse threads.
- Soft nylon tip protects mating surfaces from scratches or galling, ideal for precision components and finished parts.
Professional Applications & Engineering Value
This 3/8"-24 UNF Class 3A set screw is engineered to address common industrial challenges like component slippage, surface damage, and fastener failure due to vibration. The Nylon 6/6 plastic tip acts as a resilient locking element that maintains constant pressure, preventing back-off in machinery, motor assemblies, and rotating equipment. Made from 18-8 stainless steel with a Rockwell B80 hardness, it resists corrosion and wear in demanding settings such as automotive, aerospace, and electronics manufacturing. The hex headless and fine thread design ensures easy, space-efficient installation while providing high clamp load retention, making it a reliable choice for permanent or semi-permanent fastening solutions.
Specification Summary & Compliance
This set screw features a 3/8"-24 UNF fine thread with Class 3A fit for precise engagement and high tensile strength. It complies with ASME B18.3 dimensional standards and is certified RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring environmental safety and regulatory adherence for global industrial use.
