S-91273A419 M8 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise component alignment ensured by the 4mm shoulder with tight ±0.25mm length tolerance
• Exceptional mechanical strength with 70,000 PSI tensile strength and 35,000 PSI shear strength for demanding applications
• Reliable thread engagement with Class 5g6g metric coarse threads (M8x1.25) for secure fastening
• Enhanced installation control through knurled socket head and 4mm hex drive for superior torque transmission
• Long-term durability supported by Rockwell B55 hardness for consistent performance under load
• Environmental compliance meeting RoHS 3 and REACH standards for global manufacturing requirements

Professional Applications & Engineering Value

This precision shoulder screw delivers critical engineering value in applications requiring exact component positioning and rotational stability. The 18-8 stainless steel construction provides excellent corrosion resistance for machinery operating in humid or chemically aggressive environments. The 4mm shoulder length with controlled tolerance acts as a precise locating dowel, eliminating component misalignment in assemblies while the M8x1.25 coarse thread ensures rapid installation and secure fastening. The knurled socket head with hex drive prevents tool slippage during high-torque applications, making these shoulder screws ideal for precision machinery, automation systems, and rotating assemblies where dimensional accuracy and reliability are paramount.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 5g6g thread fit and shoulder diameter tolerance of -0.04 to -0.01 mm. The metric coarse thread (M8x1.25) follows standard thread specifications with right-hand orientation. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and global market acceptance.