S-91259A455 2-56 ASTM A108 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
- Exceptional durability with alloy steel construction and Rockwell C32 hardness for long-lasting performance in high-stress environments.
- Superior corrosion resistance from the black oxide finish, extending service life in humid or exposed industrial settings.
- Precise alignment and secure fit with Class 3A thread fit and standard shoulder, minimizing play in assemblies.
- High tensile strength of 140,000 psi ensures reliable fastening under heavy loads without failure.
- Easy installation and removal with a 5/64" hex drive and knurled head for improved grip and torque application.
- Broad compatibility with 2-56 UNC coarse threads, suitable for various industrial components and machinery.
- Compliance with strict regulations including RoHS 3 and REACH, ensuring safe and eco-friendly use in global markets.
Professional Applications & Engineering Value
This alloy steel shoulder screw is engineered to address common industrial challenges such as misalignment and wear in dynamic applications. Featuring a 2-56 UNC coarse thread and Class 3A fit, it provides precise threading for secure connections in machinery, automotive, and electronics assemblies. The black oxide finish enhances corrosion resistance, reducing maintenance in harsh environments, while the knurled head and hex drive facilitate quick installation with standard tools. Ideal for pivots, spacers, and rotating components, this screw's high tensile strength and standard shoulder design ensure reliable performance, minimizing downtime and improving operational efficiency in demanding B2B settings.
Specification Summary & Compliance
This shoulder screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and UNC coarse threading with a 2-56 size. Manufactured in compliance with ASTM A108 specifications, it ensures consistent quality and performance. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility for industrial use.
