S-94361A379 1/2"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength – Withstands up to 140,000 psi, providing reliable performance in high-stress industrial applications.
• Precision Thread Fit – Class 3A thread ensures tight, secure fastening with minimal backlash for improved assembly accuracy.
• Superior Corrosion Resistance – Black oxide finish protects against rust and wear, extending service life in harsh environments.
• Enhanced Grip & Handling – Knurled head design allows for easy manual adjustment and prevents slipping during installation.
• High-Strength Material – Alloy steel construction with Rockwell C32 hardness offers excellent durability and fatigue resistance.
• Accurate Shoulder Alignment – Tight shoulder diameter and length tolerances ensure precise component positioning and reduced vibration.
• Compliant with Global Standards – Meets RoHS 3 and REACH regulations, ensuring safe use in regulated industries.

Professional Applications & Engineering Value

This shoulder screw is engineered to address critical alignment and load-bearing challenges in machinery, automation, and precision equipment. The 1/2"-20 UNF fine thread with Class 3A fit provides secure, vibration-resistant connections, while the 5/8" shoulder diameter acts as a precise pivot or spacer in assemblies. Made from alloy steel and treated with a black oxide finish, it resists corrosion and wear in demanding environments like automotive jigs, conveyor systems, and robotic arms. The knurled socket head allows for quick tool-free adjustments, reducing downtime in maintenance-heavy applications. Ideal for securing rotating parts, guiding linear motion, or supporting axial loads, this screw ensures long-term reliability and reduces the risk of misalignment-induced failures.

Specification Summary & Compliance

This shoulder screw features a 1/2"-20 UNF fine thread with Class 3A thread fit and standard shoulder fit. Key dimensions include a shoulder diameter of 5/8" (tolerance: -0.004" to -0.002") and shoulder length of 1 7/8" (tolerance: -0.005" to 0.005"). It complies with RoHS 3 (2015/863/EU) under exemption 6(a) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for industrial use.