S-97345A636 1/4"-20 ASME B18.3 Shoulder Screws
Shoulder Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
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 demanding, high-load applications.
- Precise thread engagement with Class 3A fit and UNC coarse threads ensuring reliable, vibration-resistant fastening.
- Secure, non-slip installation provided by the knurled socket head and 3/16" hex drive, enhancing torque application and grip.
- Accurate component alignment due to the 3/8" shoulder diameter with tight tolerances, reducing assembly errors.
- Long-term durability supported by Rockwell B79 hardness, resisting wear and deformation under stress.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. Its 1/4"-20 UNC coarse thread with Class 3A fit provides superior thread engagement, minimizing the risk of loosening in high-vibration environments like robotics and conveyor systems. The knurled socket head and hex drive design allow for efficient torque transfer, reducing installation time and preventing tool slippage. With a robust 70,000 psi tensile strength and corrosion-resistant material, it excels in applications such as pivot points, bearing mounts, and assembly jigs, where alignment accuracy and long-term reliability are paramount. This screw delivers consistent performance in industries from manufacturing to aerospace, ensuring reduced downtime and maintenance costs.
Specification Summary & Compliance
This shoulder screw features precise dimensional tolerances, including a Class 3A thread fit for tight engagement and a shoulder diameter tolerance of -0.004" to -0.002". It adheres to ASME B18.3 specifications for consistent quality and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, it meets environmental and safety requirements, making it suitable for global industrial use.
