S-97705A661 1/4"-28 x 3/8" QQ-P-35, MS51023-63 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extended service life.
• Precise, secure fastening ensured by Class 3A thread fit and fine UNF thread spacing, minimizing backlash in critical assemblies.
• Easy installation and removal using a standard 1/8" hex key, providing reliable torque transfer without head protrusion.
• Enhanced gripping power from the cup tip design, which bites into surfaces to prevent component slippage under vibration.
• Compact, space-saving design as a headless set screw, allowing flush mounting in tight or restricted areas.
• Compliance with stringent regulations including RoHS 3 and REACH, ensuring environmental safety and global market acceptance.
• Reliable performance in inch-system applications, meeting Fed. Spec. QQ-P-35 for consistent quality in industrial fastening.

Professional Applications & Engineering Value

This 18-8 stainless steel set screw delivers exceptional value in precision engineering, where corrosion resistance and thread accuracy are paramount. The headless hex drive and fine UNF thread with Class 3A fit provide a tight, reliable hold in machinery, automotive, and electronics assemblies, reducing the risk of loosening under dynamic loads. The cup tip enhances grip on shafts and collars, solving common issues of component drift in high-vibration environments. Ideal for right-hand thread applications in the inch system, it supports efficient maintenance and assembly workflows while adhering to industry standards for durability and performance.

Specification Summary & Compliance

This set screw features a 1/4"-28 UNF fine thread with Class 3A thread fit for high precision, a 3/8" length, and 1/8" hex drive. It conforms to Fed. Spec. QQ-P-35 (MS51023-63) and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for industrial use.