The RS Pro 189‑670 is a precision-engineered plain washer crafted from A4 (316) stainless steel, designed for M10 bolts and nuts. Compliant with BS 4320 standards, it features an inner diameter of 10.5 mm, an outer diameter of 21 mm, and a thickness of 1.25 mm. Primarily used to distribute load and reduce stress on materials evenly, these washers help maintain structural integrity across a wide range of industrial, electrical, and food processing applications.

Why Buy the RS Pro Stainless Steel Plain Washer?

Choosing RS Pro's stainless steel washer ensures reliability and corrosion resistance without incurring a premium cost. Its A4 316 composition provides excellent performance in harsh environments, including those with chemicals, marine applications, and food-grade settings. The BS 4320 certification confirms consistent dimensions and compatibility. Ultimately, this washer offers dependable, high-quality performance, making tightening, assembly, and long-term durability both cost-effective and user-friendly.

Product Highlights:

• Material: A4 (316) stainless steel — superior corrosion resistance
• Standard compliance: BS 4320 ensures accuracy and interchangeability
• Dimensions: 10.5 mm ID, 21 mm OD, 1.25 mm thickness — for M10 bolts/nuts
• Functionality: Spreads load to prevent surface damage and distortion
• Suitable environments: Ideal for electronic, chemical, food-processing, construction, and marine applications.