S-93856A142 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life
• Precise component alignment through the precision-ground shoulder with tight diameter tolerance, minimizing assembly play
• High-strength performance offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing in demanding applications
• Secure, slip-resistant fastening enabled by the knurled socket head and 2mm hex drive for maximum torque application and tool grip
• Consistent and reliable thread engagement with Class 5g6g metric coarse thread (M3 x 0.5mm), ensuring predictable clamping force and vibration resistance
• Versatile shoulder length selection from 4mm to 49.75mm, providing design flexibility for various spacing and pivoting requirements
• Compliance with global environmental standards including RoHS 3 and REACH, ensuring safe use in regulated markets and applications

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, making it suitable for applications in electronics, automation, and machinery exposed to moisture or chemicals. The precision shoulder acts as a built-in spacer or pivot, eliminating the need for additional bushings or washers, which reduces parts count and assembly time. The knurled socket head with a 2mm hex drive ensures high torque transmission without cam-out, securing components firmly even in high-vibration environments. With its Class 5g6g thread fit and coarse pitch, it offers quick assembly and reliable performance in industrial fastening applications where repeatability and strength are paramount.

Specification Summary & Compliance

This shoulder screw conforms to metric system dimensions with an M3 thread size and 0.5mm coarse pitch. The thread is manufactured to Class 5g6g tolerance for consistent fit, while the shoulder diameter tolerance is -0.072 to -0.01 mm and length tolerance is ±0.05 mm, ensuring precise alignment. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming it is free of restricted substances for use in industrial and electronic products globally.