S-97768A297 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 18-8 Stainless Steel construction and Black Oxide finish, ideal for harsh industrial environments.
- Precise alignment and reduced wear due to the 5/16" shoulder diameter with tight tolerances, ensuring stable component positioning.
- High-strength performance offering 70,000 psi tensile strength and 35,000 psi shear strength for demanding mechanical applications.
- Easy installation and removal with a 5/32" hex socket drive and knurled head for secure grip and torque application.
- Reliable thread engagement featuring 1/4"-20 UNC coarse threads with Class 3A fit for consistent, vibration-resistant fastening.
- Enhanced durability from Rockwell B55 hardness, providing long-term reliability under repetitive loads.
- Broad compliance meeting ASME B18.3 standards, RoHS 3, and REACH regulations for safe, quality-assured use.
Professional Applications & Engineering Value
This shoulder screw is engineered to address common industrial challenges such as misalignment and component wear in precision assemblies. The 18-8 Stainless Steel material, combined with a Black Oxide finish, offers excellent resistance to corrosion and oxidation, making it suitable for machinery, automotive, and electronics applications. The 5/16" shoulder diameter with controlled tolerances ensures accurate pivoting and spacing, reducing stress on moving parts. With a 1/4"-20 UNC coarse thread and Class 3A fit, it provides secure fastening in high-vibration environments, while the socket head and knurled texture allow for efficient tool access in confined spaces. Ideal for use in jigs, fixtures, and rotating mechanisms, this screw enhances assembly longevity and performance.
Specification Summary & Compliance
This shoulder screw adheres to precise dimensional standards, including a Class 3A thread fit for superior accuracy and a shoulder diameter tolerance of -0.004" to -0.002". It conforms to ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.
