S-91808A108 5/8"-8 Acme Lead Screws and Nuts

Key Features & Benefits at a Glance

• Enhanced Durability: Grade 2 carbon steel construction with 64,000 psi tensile strength and Rockwell B85 hardness ensures long-lasting performance in demanding industrial environments.
• Precision Movement: 0.125" travel per turn provides consistent and accurate linear motion control for repetitive applications.
• Reliable Thread Engagement: Class 2G thread fit offers optimal clearance for smooth operation with Acme lead screws, reducing binding and wear.
• Left-Hand Thread Compatibility: Specifically designed for systems requiring reverse-direction motion, expanding application versatility.
• Easy Installation & Maintenance: Standard 1 1/16" hex design allows for straightforward wrenching and secure fastening in assembly lines.
• Environmental Compliance: Meets RoHS 3 and REACH standards, ensuring safe use in regulated industries without hazardous substances.
• Robust Load Handling: Engineered for general-purpose thrust and rotational loads in machinery, supporting efficient power transmission.

Professional Applications & Engineering Value

This 5/8-8 left-hand Acme hex nut is engineered to address common industrial challenges such as misalignment, thread wear, and inconsistent motion in automated systems. The Grade 2 carbon steel material provides excellent strength-to-weight ratio, resisting deformation under continuous use. With its Acme thread form and Class 2G fit, it ensures minimal backlash and reliable engagement with lead screws, making it ideal for precision equipment like CNC machines, linear actuators, and conveyor systems. The left-hand thread direction allows for unique mechanical configurations where standard right-hand threads are unsuitable, enhancing design flexibility. Its compliance with RoHS and REACH standards makes it a responsible choice for OEMs in manufacturing, packaging, and automotive sectors, ensuring both performance and regulatory adherence.

Specification Summary & Compliance

This nut features a 5/8-8 left-hand Acme thread with Class 2G thread fit per industry standards, ensuring dimensional accuracy and compatibility. Manufactured from Grade 2 carbon steel, it delivers a tensile strength of 64,000 psi and Rockwell B85 hardness. Key dimensions include a height of 39/64" and width of 1 1/16" for the hex nut design. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for global industrial applications without restricted substances.