S-92949A439 1/4"-32 x 1/2" Stainless Steel Button Head Hex-Drive Screws
Stainless Steel Button Head Hex-Drive 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 from 18-8 stainless steel construction, ideal for harsh or humid environments
- Exceptional thread engagement and vibration resistance due to extra fine UNEF threading and Class 3A precision fit
- High-strength performance with a tensile strength of 70,000 psi for reliable, durable fastening
- Optimized for confined spaces with a low-profile, rounded button head design and compact hex drive
- Consistent material integrity ensured by Rockwell B55 hardness, providing excellent wear resistance
- Full-length threading offers maximum grip and adjustability across the entire shank
- Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safe and sustainable use
Professional Applications & Engineering Value
This 18-8 stainless steel rounded head screw with 1/4"-32 extra fine thread and Class 3A fit is engineered to address critical challenges in precision assembly. The UNEF thread provides more threads per inch than standard coarse threads, delivering superior resistance to loosening under vibration—a common issue in machinery, electronics, and automotive applications. The corrosion-resistant properties of 18-8 stainless steel make it suitable for demanding environments where exposure to moisture or chemicals is a concern. The low-profile button head and hex drive allow for easy installation in tight spaces without compromising on torque application, ensuring a secure and flush finish. This combination of high tensile strength and precision threading offers reliable performance in applications requiring fine adjustments and long-term durability.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit for high-precision applications, ensuring tight tolerances and reliable performance. It is manufactured with a UNEF (Unified Extra Fine) thread standard and is fully threaded for maximum utility. The product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for industrial use.
