S-98201A414 5/16"-18 x 1 1/2" Exact-Grip-Length Flanged Socket Head Screws
Exact-Grip-Length Flanged Socket 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 with 18-8 stainless steel construction for reliable performance in harsh environments
- Superior load-bearing capacity thanks to 80,000 psi tensile strength and Rockwell B83 hardness for demanding applications
- Precise thread engagement with Class 3A fit ensuring secure fastening and vibration resistance
- Enhanced stability and distribution from the integrated flange design, reducing the need for separate washers
- Easy installation in confined spaces with standard hex socket drive requiring only a 1/4" Allen key
- Optimized for coarse-thread applications using 5/16"-18 UNC threads for quick assembly and reduced cross-threading risk
- Compliance with environmental regulations including RoHS 3 and REACH for safe use in regulated industries
Professional Applications & Engineering Value
This 18-8 stainless steel socket head cap screw is engineered to address critical industrial challenges where corrosion resistance, high tensile strength, and precise thread fit are paramount. The Class 3A thread fit and coarse UNC threading ensure rapid, secure assembly in machinery, automotive components, and structural frameworks, minimizing installation time while maximizing joint integrity. The flanged design provides superior load distribution, preventing surface damage and loosening under vibration—common in heavy-duty equipment and manufacturing systems. With its 80,000 psi tensile rating and Rockwell B83 hardness, it withstands extreme mechanical stresses, making it ideal for aerospace, marine, and chemical processing applications where durability and regulatory compliance are non-negotiable.
Specification Summary & Compliance
This screw adheres to UNC coarse thread standards with a Class 3A precision thread fit for tight tolerances and reliable performance. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements, ensuring it is free of hazardous substances and suitable for global industrial use. Manufacturing conforms to industry specifications for dimensional accuracy, including a thread diameter of 0.3125" and a consistent 1/2" thread length on a partially threaded shank.
