S-90291A852 8-32 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
- Secure Anti-Loosening Performance – Green nylon 6/6 tip provides vibration-resistant locking, maintaining clamp load in dynamic applications.
- Superior Corrosion Resistance – 18-8 stainless steel construction ensures long-term reliability in harsh or humid environments.
- High-Strength Thread Engagement – Class 3A fit offers tighter tolerances for improved fatigue resistance and assembly precision.
- Wide Temperature Suitability – Nylon tip functions reliably from -50° to 250°F, accommodating diverse operating conditions.
- Flush, Space-Saving Installation – Headless hex drive design allows countersunk mounting where clearance is limited.
- Consistent Torque Transmission – 5/64" hex drive enables secure tool engagement, reducing cam-out risk during installation.
- Industry-Standard Compliance – Manufactured to ASME B18.3 specifications for guaranteed interchangeability and quality.
Professional Applications & Engineering Value
This 8-32 UNC Class 3A set screw combines 18-8 stainless steel durability with a nylon 6/6 tip to solve critical assembly challenges. The coarse UNC thread ensures rapid installation in soft materials or blind holes, while the headless hex drive maintains a low profile in tight spaces. Engineers specify this fastener for precision shaft collars, gear positioning, and rotary component retention where vibration-induced loosening would compromise machine safety. The Rockwell B80 hardness provides optimal resistance to galling during torque application, and the green nylon tip creates consistent friction locking without damaging shaft surfaces. Ideal for industrial machinery, automotive subsystems, and electronic enclosures, this set screw delivers repeatable clamping force while meeting environmental regulatory requirements.
Specification Summary & Compliance
Thread system conforms to 8-32 UNC coarse thread with Class 3A fit for high-precision applications. Manufacturing complies with ASME B18.3 dimensional standards. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental directives. Material certification includes 18-8 stainless steel with Rockwell B80 hardness and nylon 6/6 plastic tip rated for -50° to 250°F service range.
