S-97705A234 4-40 x 1/4" QQ-P-35, MS51021-11 Set Screws
Set Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance thanks to 18-8 stainless steel construction, ideal for harsh or humid industrial environments.
- Precise, secure fastening with Class 3A thread fit, ensuring tight tolerances and reduced risk of loosening under vibration.
- High torque application capability from the hex drive design, allowing for easy installation and removal with standard tools.
- Space-saving headless design that sits flush with or below the surface, perfect for compact assemblies.
- Excellent grip and holding power provided by the cup tip, which bites into the contact surface for a firm, non-slip lock.
- Reliable performance in coarse threading applications with UNC 4-40 thread, offering quick assembly and strong engagement.
- Compliance with strict industry standards, including Fed. Spec. QQ-P-35, RoHS 3, and REACH, ensuring safety and environmental responsibility.
Professional Applications & Engineering Value
This 18-8 stainless steel set screw is engineered to address common industrial challenges such as component slippage and corrosion-induced failure. Its headless hex drive and Class 3A thread fit provide a secure, low-profile fastening solution for machinery, automotive, and electronics assemblies where space is limited and vibration resistance is critical. The UNC coarse thread and cup tip enhance grip on shafts or collars, preventing rotational movement and ensuring long-term reliability. Made from durable stainless steel, it withstands exposure to moisture and chemicals, reducing maintenance needs and downtime in demanding applications like motor mounts, gear assemblies, and precision instruments.
Specification Summary & Compliance
This set screw features a 4-40 UNC thread size with a 0.112" thread diameter, coarse thread spacing, and Class 3A fit for high precision. It adheres to Fed. Spec. QQ-P-35 (MS51021-11) manufacturing standards and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety requirements for industrial use.
