S-97768A394 5/16"-18 ASME B18.3 Shoulder Screws
Shoulder 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 with 18-8 stainless steel and black oxide finish, ideal for harsh industrial environments.
- Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for heavy-duty applications.
- Precise Class 3A thread fit ensures tight tolerances and reliable fastening in high-vibration settings.
- Knurled socket head design provides enhanced grip and prevents tool slippage during installation.
- Coarse UNC threading allows for quick assembly and disassembly, reducing labor time.
- Rockwell B55 hardness delivers excellent wear resistance and long-term durability.
- Compliance with ASME B18.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards.
Professional Applications & Engineering Value
This shoulder screw is engineered to address critical challenges in industrial machinery, automation, and precision equipment. The 18-8 stainless steel construction combined with a black oxide finish provides robust protection against rust and chemical exposure, extending service life in demanding conditions. The 3/16" hex drive and knurled head ensure secure tool engagement, minimizing installation errors and downtime. With a Class 3A thread fit and coarse UNC threading, it offers reliable alignment and fast assembly in high-stress applications like conveyor systems, robotic arms, and motor mounts. Its high tensile and shear strength makes it suitable for load-bearing components, reducing the risk of fastener failure and maintenance costs.
Specification Summary & Compliance
This shoulder screw adheres to ASME B18.3 specifications, featuring precise dimensions including a 5/16"-18 UNC thread with Class 3A fit for tight tolerance control. The shoulder diameter and length maintain standard tolerances (e.g., shoulder diameter: -0.004" to -0.002"). It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it meets environmental and safety regulations for industrial use.
