S-98625A361 1/4"-100 x 3 1/4" Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit for maximum engagement and vibration resistance in precision assemblies
• Excellent corrosion resistance provided by 303 Stainless Steel material, ideal for demanding industrial environments
• Space-saving headless design with hex drive allows for flush mounting where clearance is limited
• Enhanced grip and alignment from the alloy steel ball tip that prevents walking and maintains secure positioning
• Precise ultra-fine thread engagement (1/4"-100) for accurate adjustments and reliable fastening in thin materials
• Easy installation and removal with standard 3/32" hex drive tooling, reducing assembly time
• Regulatory compliance assurance with RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

This ultra fine thread set screw is engineered to solve critical challenges in precision machinery and equipment assembly. The 303 Stainless Steel construction provides excellent corrosion resistance while maintaining machinability, making it ideal for applications exposed to moisture, chemicals, or temperature variations. The Class 3A thread fit ensures tight tolerances and superior holding power, preventing loosening under vibration in motors, precision instruments, and automated systems. The headless hex design with 3/32" drive allows for compact installations where space constraints exist, while the alloy steel ball tip creates positive seating and prevents damage to shaft surfaces. These right-hand UNS threads deliver reliable performance in positioning components, adjusting mechanisms, and securing collars and pulleys where minute adjustments are critical.

Specification Summary & Compliance

This precision fastener features 1/4"-100 ultra fine threads with Class 3A fit per UNS standards, ensuring exact dimensional accuracy and superior thread engagement. The 3-1/4" length provides ample engagement for deep mounting applications. Manufacturing complies with RoHS 3 (2015/863/EU) with exemption 6(c) for lead in copper alloy and REACH (EC 1907/2006) compliance, meeting current environmental and safety regulations for industrial use.