S-90269A955 M33 ISO 7379 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 316 stainless steel construction, ideal for harsh industrial environments and chemical exposure.
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B79 hardness for reliable load-bearing in demanding applications.
• Precise component alignment enabled by the 120mm shoulder with controlled diameter tolerance, reducing wear and ensuring smooth rotational movement.
• Secure, high-torque installation using the 17mm hex drive and knurled head, preventing slippage and ensuring a tight, stable fit.
• Long-term durability and consistent performance thanks to the black oxide finish, which adds an extra layer of protection against rust and abrasion.
• Guaranteed dimensional accuracy and interchangeability with Class 5g6g thread fit and compliance with the ISO 7379 standard.
• Safe for regulated industries as it is fully compliant with RoHS 3 and REACH environmental and safety regulations.

Professional Applications & Engineering Value

This M33 shoulder screw is engineered to solve critical alignment and durability challenges in industrial applications. The 316 stainless steel core provides excellent resistance to corrosion, making it suitable for machinery exposed to moisture, chemicals, or outdoor conditions. The black oxide finish further enhances surface protection, reducing friction and preventing galling. The precision-ground shoulder (36mm diameter, 120mm length) acts as a reliable pivot or spacer, maintaining exact positioning in assemblies such as conveyor systems, rotating shafts, and precision instruments. Its coarse metric thread (M33x3.5mm) and hex drive ensure quick, secure fastening, minimizing assembly time while upholding the ISO 7379 standard for consistent quality and performance in high-stress environments.

Specification Summary & Compliance

This shoulder screw features a metric thread (M33x3.5mm, coarse pitch) with a Class 5g6g thread fit for precise engagement. The shoulder diameter is 36 mm with a tolerance of -0.072 to -0.01 mm, and the shoulder length is 120 mm with a tolerance of 0 to 0.25 mm, ensuring high dimensional accuracy. Manufacturing and material specifications conform to ISO 7379. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety standards for hazardous substances.