S-97345A880 1/2"-13 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 environments and chemical exposure.
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads and stress.
- Precision Class 3A thread fit provides secure, vibration-resistant fastening with minimal backlash.
- Knurled head texture offers enhanced grip for easier manual installation and adjustment.
- 2" shoulder length with tight tolerances allows for accurate alignment and spacing in assemblies.
- Hex socket drive (3/8") enables high-torque installation with standard tools, reducing slippage.
- Compliance with ASME B18.3, RoHS 3, and REACH ensures quality, safety, and environmental standards are met.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial settings, such as misalignment, corrosion, and mechanical failure. The 1/2"-13 UNC coarse thread with Class 3A fit ensures quick assembly and robust holding power, reducing downtime in production lines. The 2" precision shoulder acts as a reliable pivot or spacer in machinery, automotive, and aerospace applications, maintaining component alignment under dynamic loads. With a Rockwell B79 hardness and 70,000 psi tensile strength, it withstands extreme conditions while the knurled head and hex drive simplify maintenance. Ideal for corrosion-resistant fastening in pumps, valves, and conveyor systems, this screw delivers long-term reliability and cost savings.
Specification Summary & Compliance
This shoulder screw features a 1/2"-13 UNC thread with Class 3A fit for precise engagement, a shoulder diameter of 3/4" with tolerance of -0.004" to -0.002", and shoulder length of 2" with tolerance of -0.005" to 0.005". It meets ASME B18.3 specifications for dimensional accuracy and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for various industrial uses.
