S-91190A515 3.9 mm ID x 6.1 mm OD DIN 7980 Split Lock Washers for Socket Head Screws

Key Features & Benefits at a Glance

• Superior vibration resistance due to the split lock design, preventing fastener loosening in dynamic applications
• Enhanced durability and corrosion resistance from the black-oxide steel finish, extending service life in various environments
• Reliable hardness and spring action with a Rockwell C44 rating, ensuring consistent locking force and reusability
• Precise dimensional fit with a 3.9 mm ID and 6.1 mm OD, designed for secure installation on M3.5 screws
• Guaranteed quality and interchangeability through compliance with the DIN 7980 standard for metric washers
• Safe for sensitive applications as it is RoHS 3 and REACH compliant, meeting strict environmental regulations
• Versatile industrial use with a standard split lock type, suitable for a wide range of machinery and equipment assemblies

Professional Applications & Engineering Value

This M3.5 metric split lock washer is engineered to address common industrial challenges such as vibration-induced loosening and corrosion in mechanical assemblies. The black-oxide steel material provides a protective layer against rust, making it ideal for automotive, electronics, and machinery sectors where environmental factors are a concern. Its split lock design and Rockwell C44 hardness ensure a robust spring effect that maintains clamp load under stress, reducing maintenance needs and downtime. Complying with DIN 7980, it offers precise threading and dimensional accuracy for M3.5 screws, enhancing assembly reliability in high-vibration environments like motors and conveyor systems. This washer delivers long-term performance, supporting efficient and safe operations in demanding B2B settings.

Specification Summary & Compliance

This washer features precise dimensions with an inner diameter of 3.9 mm, outer diameter of 6.1 mm, and thickness of 0.9-1.1 mm, ensuring accurate fit for M3.5 screw sizes. It conforms to the DIN 7980 standard for metric split lock washers, guaranteeing dimensional and performance consistency. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, affirming its safety and environmental responsibility for industrial use.