S-93856A182 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and washdown applications
• Enhanced torque transmission and slip resistance thanks to the knurled head texture and 2.5mm hex socket drive
• Reliable, precision thread engagement ensured by the Class 5g6g thread fit, minimizing the risk of cross-threading and assembly issues
• High mechanical strength with a tensile strength of 70,000 psi and Rockwell B55 hardness for demanding applications
• Versatile shoulder length options from 50mm to 99.75mm, providing precise spacing and acting as a pivot or axle in assemblies
• Broad regulatory compliance with RoHS 3 and REACH, making them suitable for global markets and sensitive applications
• Coarse M4 x 0.7mm thread for faster assembly and reduced susceptibility to thread damage compared to fine-pitch alternatives

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to solve critical alignment and pivot-point challenges in industrial applications. The precision-machined shoulder provides an exact unthreaded bearing surface, eliminating the need for separate spacers and bushings, which reduces part count and assembly time. Manufactured from 18-8 Stainless Steel, it offers excellent resistance to rust and corrosion, ensuring long-term reliability in environments exposed to moisture or chemicals. The Class 5g6g thread fit guarantees consistent, secure fastening, while the hex socket drive with a knurled head allows for high-torque installation without slippage. This makes it an indispensable component in machinery, automation systems, and precision instruments where dimensional accuracy and high strength are paramount.

Specification Summary & Compliance

This precision metric shoulder screw features an M4 x 0.7mm coarse thread with a Class 5g6g thread fit per ISO standards, ensuring dimensional accuracy and interchangeability. The shoulder diameter is held to a tight tolerance of -0.072 to -0.01 mm, and the shoulder length tolerance is ±0.05 mm. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming its suitability for use in regulated industries and environmentally conscious supply chains.