S-98625A161 1/4"-80 x 3 3/4" Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 303 stainless steel construction, ideal for harsh industrial environments
• Precise thread engagement with Class 3A fit and UNS ultra fine threads for maximum holding strength and vibration resistance
• Secure installation using a 3/32" hex drive in a headless design, allowing flush mounting in tight spaces
• Enhanced gripping performance from the alloy steel ball tip (0.156" diameter) that minimizes surface damage
• Extended service life with a generous 3 3/4" length for deep penetration and reliable fastening
• Right-hand thread direction for standard assembly procedures and compatibility with common machinery
• Regulatory compliance with RoHS 3 and REACH standards, ensuring safe use in regulated industries

Professional Applications & Engineering Value

This 1/4-80 ultra fine thread set screw delivers exceptional performance in precision assemblies where vibration resistance and minimal protrusion are critical. The 303 stainless steel material provides excellent corrosion resistance, making it suitable for aerospace, medical equipment, and high-end machinery applications. The Class 3A thread fit ensures tight tolerances and reliable clamping force, while the alloy steel ball tip offers superior point contact without marring sensitive components. Its headless design with 3/32" hex drive allows installation in confined spaces, and the ultra fine thread spacing provides enhanced adjustment precision for calibration devices and optical instruments.

Specification Summary & Compliance

This set screw features a 1/4"-80 UNS ultra fine thread with Class 3A fit for high-precision applications. The 3 3/4" length and 0.25" thread diameter provide optimal engagement depth. It complies with RoHS 3 (2015/863/EU) with exemption 6(c) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for industrial use.