S-93856A221 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ensuring long-term performance in harsh environments.
• High mechanical strength offering 70,000 psi tensile strength and 35,000 psi minimum shear strength for reliable load-bearing applications.
• Precise thread engagement with Class 5g6g thread fit and coarse 0.7mm pitch for quick assembly and secure fastening.
• Secure hex socket drive with 3mm drive size providing high torque transmission and reduced risk of tool slippage.
• Accurate shoulder positioning featuring tight diameter and length tolerances for consistent alignment in mechanical assemblies.
• Environmental compliance meeting RoHS 3 and REACH standards for safe use in regulated industries.
• Versatile shoulder length options from 50-99.75mm to accommodate various design requirements.

Professional Applications & Engineering Value

This M4 shoulder screw delivers exceptional engineering value in precision applications where alignment and durability are critical. The 18-8 stainless steel construction provides excellent corrosion resistance, making it ideal for machinery exposed to moisture, chemicals, or outdoor conditions. The hex socket drive design ensures secure installation in confined spaces while the Class 5g6g thread fit guarantees consistent engagement in automated assembly processes. The precisely machined shoulder maintains accurate component positioning in rotating assemblies, jigs, and fixtures, eliminating the need for additional spacers or bushings. These metric shoulder screws are particularly valuable in manufacturing equipment, robotics, and precision instruments where vibration resistance and dimensional stability are essential for long-term reliability.

Specification Summary & Compliance

This precision shoulder screw features M4 x 0.7mm coarse thread with Class 5g6g thread fit, ensuring compatibility with standard metric components. Shoulder diameter tolerance ranges from -0.072 to -0.01 mm with length tolerance of ±0.05 mm for precise fitment. Manufactured from 18-8 stainless steel with Rockwell B55 hardness, the screw complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for use in electronics, medical devices, and other regulated industries where material restrictions apply.