S-8077A655 1/4"-20 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 and Black Oxide finish, ideal for harsh industrial environments.
- High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for reliable performance in demanding applications.
- Precise alignment and secure fit due to Class 3A thread fit and standard shoulder design, reducing assembly errors.
- Easy installation and removal with hex drive and knurled head, providing excellent grip and torque application.
- Enhanced durability from Rockwell B79 hardness, ensuring long service life under mechanical stress.
- Broad compliance with ASME B18.3 standards, RoHS 3, and REACH, meeting stringent industry and environmental regulations.
- Versatile coarse thread (UNC) for quick assembly and strong holding power in various materials.
Professional Applications & Engineering Value
This 316 Stainless Steel Shoulder Screw is engineered to address critical challenges in precision machinery, automation, and heavy-duty equipment. The Black Oxide finish enhances corrosion resistance, making it suitable for moist or chemically aggressive settings, while the Class 3A thread fit ensures tight tolerances and vibration resistance in assemblies. The knurled head and hex drive facilitate easy handling and high-torque installation, reducing downtime. Ideal for applications like rotating shafts, pivots, and spacers, this screw provides reliable shoulder diameter and length control, minimizing misalignment and wear in industrial systems. Its compliance with ASME B18.3 and environmental standards guarantees consistency and safety in global supply chains.
Specification Summary & Compliance
This shoulder screw features precise dimensions, including a 1/4"-20 UNC coarse thread with Class 3A fit for high accuracy, and shoulder diameter and length tolerances (e.g., -0.004" to -0.002" for diameter) ensuring consistent performance. It meets ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting eco-friendly and safe industrial use.
