S-91273A781 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with 18-8 stainless steel construction, ideal for demanding industrial environments.
• Superior thread reliability due to Class 5g6g thread fit, ensuring consistent engagement and reduced assembly issues.
• High mechanical strength offering 70,000 PSI tensile and 35,000 PSI shear strength for secure, long-lasting fastening.
• Durable black oxide finish provides added wear resistance and a sleek, low-reflectivity appearance.
• Easy installation and removal with hex socket drive and 2 mm drive size, accommodating standard tools.
• Improved grip and handling from the knurled head texture, preventing slippage during manual adjustments.
• Precision shoulder design with tight diameter and length tolerances for accurate alignment in assemblies.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address common industrial challenges such as misalignment and component wear. The 18-8 stainless steel material ensures excellent corrosion resistance, while the black oxide finish enhances durability in high-friction applications. With a Class 5g6g thread fit and coarse metric thread (M4 x 0.7mm), it provides reliable performance in machinery, automotive, and electronics assemblies where precise shoulder positioning is critical. The knurled head and hex drive facilitate quick installation, reducing downtime in production lines.

Specification Summary & Compliance

This shoulder screw features a metric coarse thread with M4 size, 0.7mm pitch, and Class 5g6g thread fit for consistent accuracy. Shoulder dimensions include a diameter of 4 mm (tolerance: -0.04 to -0.01 mm) and length of 6 mm (tolerance: 0 to 0.25 mm). It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for industrial use.