Washers – Galvanised – Form A (Box Qty)

Form A washers are the standard flat washer used across general construction, steel fabrication, timber framing, and general fixing work. These galvanised Form A washers follow the DIN 125 profile, with a flat face and consistent thickness that spreads load across a broader bearing area than a bolt head or nut alone. If you have ever had a nut pull through softwood or a bolt head sink into a surface, you already know what these are for.

The hot-dip galvanised finish gives these washers solid corrosion resistance, making them suitable for external and exposed applications where plain steel would begin to rust within weeks. That includes outdoor structural work, fencing, garden buildings, cladding fixings, and any application where the fastener will face rain, condensation, or contact with treated timber.

Where Galvanised Form A Washers Get Used

Form A is the most widely used washer profile in UK construction and engineering. The flat, thin profile fits under standard hex nuts and bolt heads without taking up unnecessary space, and the M4 to M20 size range covers the majority of fixings used on a typical site. Available sizes run from M4 up to M20, with box quantities from 100 to 1250 units depending on size, so you can buy to suit the job rather than raiding a mixed bag every time.

These washers are particularly useful in timber construction and steelwork connections where load distribution matters. When bolting through structural members, purlins, rails, or brackets, a Form A washer under both the head and the nut is standard practice and often a requirement under fixing specifications.

Galvanised Finish for Outdoor Use

The galvanised coating on these form a washers resists white rust and general oxidation far better than zinc electroplate. For outdoor fixings or anywhere near treated timber, which contains preservatives that accelerate corrosion in plain steel, galvanised is the correct choice. Not glamorous, but consistently reliable.