S-94361A552 M8 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black oxide finish, extending service life in demanding environments
• High tensile strength (140,000 psi) and Rockwell C32 hardness for reliable performance under heavy loads
• Precision shoulder dimensions with tight tolerances (±0.25mm length, -0.072/-0.01mm diameter) ensuring accurate alignment in assemblies
• Knurled socket head provides enhanced grip and prevents slipping during installation with standard hex tools
• Coarse metric thread (M8x1.25) with Class 5g6g fit enables quick assembly and secure fastening
• Compliance with RoHS 3 and REACH regulations meets international environmental standards for industrial applications
• 50mm shoulder length offers stable bearing surface for rotating components and precise spacing

Professional Applications & Engineering Value

This M8 shoulder screw delivers exceptional engineering value in precision machinery and industrial equipment where alignment accuracy and durability are critical. The alloy steel construction with black oxide finish combats corrosion in manufacturing environments, while the 50mm shoulder length with tight tolerances ensures precise component positioning in assemblies. The knurled socket head design prevents tool slippage during high-torque installation, reducing installation errors and maintenance downtime. Ideal for precision applications including rotating shafts, bearing retainers, and mechanical linkages, this metric shoulder bolt maintains dimensional stability under continuous operational stress, making it a reliable choice for automotive, automation, and heavy equipment industries.

Specification Summary & Compliance

This shoulder screw features Class 5g6g thread fit per metric standards with M8x1.25 coarse thread configuration. Shoulder diameter tolerance maintains -0.072 to -0.01 mm while shoulder length tolerance is 0 to 0.25 mm for precision alignment. Manufacturing complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as steel alloying element and REACH (EC 1907/2006) compliance verified as of January 17, 2023. The combination of alloy steel material and black oxide surface treatment ensures consistent performance in industrial applications requiring reliable fastening solutions.