S-97345A409 8-32 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 316 stainless steel construction, ideal for harsh industrial and marine environments.
- Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high stress.
- Precise Class 3A thread fit ensures secure, vibration-resistant fastening in demanding applications.
- Knurled socket head with hex drive provides a non-slip grip for easy installation and removal, even in tight spaces.
- Accurate 3/4" shoulder length with tight tolerances maintains consistent alignment for rotating components like bearings and pulleys.
- Compliance with ASME B18.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards are met.
- Coarse UNC threads enable quick assembly and disassembly, reducing maintenance time and labor costs.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in mechanical assemblies requiring precise shaft positioning and high load capacity. The Class 3A thread fit and coarse 8-32 UNC threads provide excellent resistance to loosening under vibration, making it ideal for machinery, automotive, and aerospace applications. The 3/4" shoulder length with minimal tolerance variation ensures accurate alignment of moving parts like gears and linkages, reducing wear and extending service life. With a Rockwell B79 hardness and robust tensile strength, it withstands extreme forces while the knurled socket head allows for efficient tool engagement in confined spaces. This screw is a reliable solution for industrial shoulder screw needs, offering durability and compliance with key regulations.
Specification Summary & Compliance
This shoulder screw features precise dimensions including a shoulder diameter of 1/4" with a tolerance of -0.004" to -0.002" and a shoulder length of 3/4" with a tolerance of -0.005" to 0.005". It utilizes a Class 3A thread fit for high precision and adheres to ASME B18.3 standards. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety requirements for global industrial use.
