S-95090A427 1"-5 ASTM B505 Acme Lead Screws and Nuts

Key Features & Benefits at a Glance

• Superior wear resistance and self-lubricating properties from 932 Bearing Bronze material, reducing maintenance needs in high-friction applications.
• Precise 0.2" linear travel per revolution enables accurate positioning control in automated systems and machinery.
• Class 2G thread fit ensures consistent, reliable engagement with mating Acme screws, minimizing backlash and improving operational stability.
• Left-hand thread direction provides design flexibility for specialized mechanisms requiring reverse motion or counter-rotation safety.
• ASTM B505 compliance guarantees material consistency and performance, meeting industrial standards for bronze casting quality.
• RoHS 3 certification with exemption ensures environmental regulatory adherence while maintaining leaded bronze's mechanical advantages.
• Robust 1-21/32" diameter and round nut design offers secure mounting and even load distribution in assembly configurations.

Professional Applications & Engineering Value

This left-hand Acme thread nut delivers exceptional value in applications requiring reverse-motion precision and durability. The 932 Bearing Bronze construction inherently resists galling and provides dry-running capability, making it ideal for situations where lubrication is impractical or contaminating. With its Class 2G thread fit and standardized Acme thread profile, it ensures smooth, predictable motion in lifting systems, linear actuators, and valve controls. The 0.2" travel per turn offers fine adjustment capability for positioning equipment, while the left-hand thread direction is critical for dual-drive systems and safety-critical reverse-thread applications. Engineered to ASTM B505 specifications, this nut maintains dimensional stability under repetitive use, reducing downtime in industrial automation, packaging machinery, and material handling systems.

Specification Summary & Compliance

This Acme thread nut features a 1"-5 left-hand thread with Class 2G fit per ANSI/ASME B1.5 standards, ensuring proper clearance and functional reliability. Manufacturing adheres to ASTM B505 for continuous cast bronze, guaranteeing material integrity. The component is RoHS 3 (2015/863/EU) compliant under exemption 6(c) for lead in copper alloys, meeting environmental regulations without compromising bronze's bearing properties. Key dimensions include 1-17/32" height and 1-21/32" diameter with single-start thread configuration for consistent 0.2" travel per revolution.