S-91273A369 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• High strength and durability with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance
• Precise alignment and smooth rotation with 4mm shoulder diameter and tight tolerance for accurate assembly
• Secure and efficient installation using a standard 2mm hex drive with knurled head for enhanced grip
• Consistent thread engagement with Class 5g6g metric coarse thread ensuring reliable fastening
• Environmental compliance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Excellent shear resistance with minimum 35,000 psi shear strength for demanding mechanical applications

Professional Applications & Engineering Value

This M4 shoulder screw delivers exceptional engineering value in precision assembly applications where alignment and durability are critical. The 18-8 stainless steel construction provides excellent corrosion resistance, making it suitable for machinery, automation systems, and electronic enclosures exposed to moisture or chemicals. The hex socket head with knurled texture ensures secure tool engagement during installation, while the 16mm shoulder length with precise diameter tolerance enables accurate component positioning and smooth rotational movement. The Class 5g6g thread with coarse pitch offers reliable fastening in various materials, reducing the risk of cross-threading. These features combine to solve common industrial challenges of misalignment, corrosion-induced failure, and installation inefficiency in precision mechanical assemblies.

Specification Summary & Compliance

This precision shoulder screw features M4 x 0.7mm metric coarse thread with Class 5g6g thread fit per ISO standards. The shoulder diameter maintains tight tolerance of -0.04 to -0.01 mm, while shoulder length tolerance is 0 to 0.25 mm. Manufactured from 18-8 stainless steel with Rockwell B55 hardness, it delivers 70,000 psi tensile strength and 35,000 psi minimum shear strength. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety for industrial applications.