RS PRO Stainless Steel Plain Washers M10 BS 4320 189-670, 21mm OD, 10.5mm ID, 1.25mm Thick

RS PRO 189-670 Stainless Steel Plain Washers, M10, BS 4320, are precision-engineered washers used in mechanical assemblies to provide reliable load distribution and surface protection. Manufactured from robust A4 stainless steel, these washers offer excellent resistance to corrosion, making them suitable for demanding environments, including industrial, food processing, chemical handling, and construction.

With an external diameter of 21mm and an internal diameter of 10.5mm, the M10 size is compatible with standard metric bolts and screws. The 1.25mm thickness contributes to effective load spreading and mitigates wear and distortion of installation surfaces over time. Compliant with BS 4320 standards, these washers ensure consistent performance and fit in critical fastener assemblies.

The plain finish allows for smooth installation, reducing friction and ensuring easy tightening and loosening of bolts or nuts. Whether used in maintenance, repairs, or new constructions, these washers help maintain structural integrity by preventing surface damage and extending the life of connections.

Applications include electrical assemblies, machinery mounting, food equipment, chemical facilities, and any scenario where reliable fastener support and corrosion protection are paramount. The quality stainless steel material makes these washers particularly suitable for environments exposed to moisture or aggressive chemicals.

Corrosion-resistant stainless steel prolongs service life in harsh environments. Adheres to BS 4320 specification for precise fit and function. Used for spacing and load distribution in bolt and nut assemblies. Supports smoother maintenance through easier loosening and tightening.

Plain finish provides uniform contact and prevents distortion. Designed for versatility across industrial, commercial, and food sector requirements.

Choose RS PRO for reliability and consistent quality in fastening solutions. Browse more Washers and Fasteners in the Industrial Fasteners category for competing brands and technical types.