S-94361A395 5/8"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capacity: With a tensile strength of 140,000 psi, this shoulder screw reliably handles high-stress applications without failure.
• Precision Thread Fit for Secure Assembly: Class 3A thread fit ensures tight, vibration-resistant connections, reducing the risk of loosening in dynamic environments.
• Superior Wear and Corrosion Resistance: The black oxide finish provides enhanced durability and protection against rust in harsh industrial settings.
• Easy Installation and Removal: The knurled socket head with a 3/8" hex drive offers superior grip and torque application, speeding up maintenance and assembly.
• Accurate Alignment and Spacing: The precisely machined 3/4" shoulder diameter and 1 3/4" shoulder length maintain component alignment, minimizing wear and misalignment.
• High Material Hardness for Longevity: Alloy steel with Rockwell C32 hardness ensures the screw withstands repeated use and impact without deforming.
• Compliance with Global Standards: Meets RoHS 3 and REACH regulations, ensuring safe and environmentally responsible use in various industries.

Professional Applications & Engineering Value

This alloy steel shoulder screw is engineered to address critical challenges in precision machinery and heavy-duty equipment. Its Class 3A thread fit and UNF fine threads provide a secure, vibration-resistant fastening solution, ideal for applications where loosening could lead to operational failures. The black oxide finish enhances corrosion resistance, extending service life in environments exposed to moisture or chemicals. With a robust shoulder diameter of 3/4" and length of 1 3/4", it ensures precise component alignment in assemblies like rotating shafts, pivots, and guides, reducing wear and maintenance downtime. The knurled socket head and 3/8" hex drive facilitate quick installation and removal, boosting efficiency in automated or manual setups. Commonly used in industrial automation, automotive systems, and machinery frames, this screw delivers reliable performance under high tensile loads, supported by its 140,000 psi tensile strength and Rockwell C32 hardness.

Specification Summary & Compliance

This shoulder screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and UNF fine threads (5/8"-18) with a thread diameter of 0.625". The shoulder features a diameter of 3/4" with a tolerance of -0.004" to -0.002" and a length of 1 3/4" with a tolerance of -0.005" to 0.005", ensuring consistent performance in alignment-critical applications. Manufactured from alloy steel, it meets industry specifications for hardness and strength. The product is compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel and REACH (EC 1907/2006), affirming its suitability for regulated industrial and engineering uses.