Timco BS4320B Form B Washer, Bright Zinc Plated, M12

The Timco BS4320B Form B Washer is a standardised, industrial-grade flat washer designed for a wide range of fastening, clamping, and spacing applications. As a thinner alternative to the Form A design, it provides an excellent bearing surface for nuts and bolt heads while helping to distribute load and prevent damage to the clamped material. Its consistent dimensions and reliable performance make it a staple component in assembly and repair tasks across numerous industries.

These washers are plated with a high-quality Trivalent Chromium (Cr3) Zinc finish. This coating offers superior corrosion resistance compared to traditional zinc plating, providing a durable and environmentally friendly protective layer. The bright, silvery appearance adds a clean, professional look to any assembly, suitable for both functional and aesthetic applications where the hardware is visible.

Manufactured from durable carbon steel, these washers provide the necessary strength for general-purpose use. The precise engineering ensures a perfect fit on standard metric bolts, facilitating smooth and secure installation. This pack format is ideal for trade professionals, maintenance teams, and manufacturing operations that require a high-volume, reliable supply of consistent quality fasteners.

Key Applications

• Creating a stable bearing surface under nuts and bolt heads
• Distributing clamping force over a wider area to protect softer materials
• Acting as a precision spacer in assemblies to maintain specific gaps
• General-purpose fastening in construction, machinery, automotive repair, and furniture assembly
• Use in environments where a corrosion-resistant finish is beneficial.