S-93255A493 1 1/4"-5 x 18" ASTM A108 Acme Lead Screws and Nuts

Key Features & Benefits at a Glance

• Enhanced Durability & Corrosion Resistance – Zinc plating on carbon steel provides reliable protection against rust, extending service life in demanding industrial environments.
• Precision Movement Control – With a consistent 0.2" travel distance per turn, this screw ensures accurate and repeatable linear motion for automated systems and machinery.
• High Tensile Strength for Demanding Loads – Rated at 53,000 psi tensile strength, it reliably handles high-stress applications without deformation or failure.
• Superior Thread Engagement & Wear Resistance – Class 2G thread fit and Rockwell B61 hardness offer excellent wear characteristics and smooth, low-backlash operation.
• Broad Industry Compliance – Manufactured to ASTM A108 standards, ensuring material consistency and performance reliability for engineering and OEM applications.
• Optimized for Right-Hand Drive Systems – Fully threaded, single-start ACME design simplifies integration and provides efficient power transmission in standard mechanical setups.

Professional Applications & Engineering Value

This ACME lead screw is engineered from zinc plated carbon steel to address common industrial challenges such as positional accuracy, load capacity, and environmental durability. The fully threaded design with a 1 1/4"-5 ACME thread and Class 2G thread fit ensures minimal play and consistent performance in linear motion systems, including CNC machines, lifting equipment, and automated conveyors. Its Grade 2 strength and Rockwell B61 hardness resist wear under cyclic loading, while the zinc coating prevents corrosion in humid or abrasive settings. Ideal for precision mechanical screw applications, it delivers reliable, long-term value by reducing maintenance needs and enhancing operational efficiency in industrial lead screw installations.

Specification Summary & Compliance

This product meets ASTM A108 material specifications, with a Class 2G thread fit ensuring dimensional accuracy and interchangeability. The single-start, right-hand ACME thread (1 1/4"-5) provides a 0.2" travel per turn, and the assembly is manufactured from Grade 2 carbon steel with a tensile strength of 53,000 psi and Rockwell B61 hardness. It is fully threaded over an 18" length and complies with industry standards for mechanical power transmission components.