S-91259A419 8-32 ASME B18.3, ASTM A574 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
- Exceptional strength and durability with alloy steel construction and Rockwell C32 hardness, ensuring long-lasting performance in demanding applications.
- Superior corrosion resistance provided by the black oxide finish, extending the screw's lifespan in harsh industrial environments.
- High load-bearing capacity with a tensile strength of 140,000 psi and minimum shear strength of 84,000 psi for reliable, heavy-duty fastening.
- Precise and secure fit due to the Class 3A thread fit and standard shoulder fit, minimizing loosening and ensuring assembly integrity.
- Easy installation and removal with a smooth socket head and 3/32" hex drive, allowing for efficient maintenance and adjustments.
- Broad compatibility with UNC coarse threading and right-hand direction, making it suitable for a wide range of machinery and equipment.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety, quality, and environmental responsibility.
Professional Applications & Engineering Value
This alloy steel shoulder screw with a black oxide finish is engineered to address critical industrial challenges, such as pivot points, rotating assemblies, and precision spacing in machinery. Its UNC thread and Class 3A fit provide tight tolerances that prevent backlash and misalignment, essential for high-vibration environments. The smooth socket head and hex drive enable quick, tool-friendly installation, reducing downtime in production lines. Ideal for automotive, aerospace, and heavy equipment sectors, it offers reliable performance where shear strength and corrosion resistance are paramount, ensuring long-term operational efficiency and reduced maintenance costs.
Specification Summary & Compliance
This shoulder screw adheres to Class 3A thread fit and UNC coarse thread standards, with precise shoulder diameter and length tolerances (e.g., shoulder diameter: -0.004" to -0.002"). Manufactured in compliance with ASME B18.3 specifications and meeting RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, it ensures consistent quality and safety for industrial use.
