S-90585A046 1/4"-20 x 4" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws
Stainless Steel Hex Drive Flat Head 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
- Exceptional corrosion resistance in harsh environments due to 316 stainless steel construction and passivated finish for extended service life.
- Superior fastening strength and reliability with a high 70,000 psi tensile strength and Rockwell B55 hardness to withstand significant loads.
- Precise and secure fit ensured by Class 3A thread fit and UNC coarse threads for easier alignment and vibration resistance.
- Efficient installation and removal with a 5/32" hex drive that provides high torque transfer and reduces tool slippage.
- Flush and unobtrusive mounting with a standard flat head and 82° countersink angle for a clean, finished appearance.
- Maximum grip and holding power along the entire shank thanks to the fully threaded 4-inch length.
- Guaranteed quality and interoperability as it meets ASME B18.3 specifications and is compliant with RoHS 3 and REACH regulations.
Professional Applications & Engineering Value
This 316 Stainless Steel Flat Head Screw is engineered to solve critical challenges in demanding industrial applications. Its core value lies in the combination of high corrosion resistance from the passivated finish and the structural integrity provided by its 70,000 psi tensile strength. The UNC coarse thread and Class 3A fit ensure rapid assembly and a secure, vibration-resistant connection in materials like metal and hard plastics, reducing the risk of loosening. The flat head with an 82° countersink allows for a flush installation, making it ideal for machinery, marine hardware, and chemical processing equipment where protrusions are not permissible and environmental durability is paramount.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC thread with a Class 3A precision fit for superior dimensional accuracy. It is manufactured in compliance with the ASME B18.3 standard. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for use in regulated markets.
