FORM F

Descriptions

Form F washers are flat metric fasteners governed by British Specification BS 4320. They are explicitly defined as having a large outside diameter (OD) and a normal thickness profile, historically categorised as "black" or heavy-series washers meant for structural and outdoor engineering tasks.

Form F vs Form C

In terms of pure physical measurements, a Form F washer shares identical dimensions with a Form C washer. However, they are separated by their historical industry finish and modern material usage:

Form C: Typically manufactured from bright mild steel and finished with Bright Zinc Plating (BZP) for general interior or light-duty tasks.
Form F: Traditionally categorized as un-machined "black" steel but overwhelmingly supplied in modern commercial trade with a Hot-Dip Galvanised (HDG) finish to survive structural outdoor use.

Specifications

No detailed specifications are available for this product.

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Code	Description	Price	Quantity
RWM12F	M12 1/2 FORM F WASHER 28 OD X 2.5 112 In Stock for dispatch	£28.65 (exc VAT) per HUND £34.38 (inc VAT) per HUND	- +
RWM12FG	M12 1/2 FORM F WASHER GALV 28 OD X 2.5 370 In Stock for dispatch	£28.50 (exc VAT) per HUND £34.20 (inc VAT) per HUND	- +
RWM12FP	M12 1/2 FORM F WASHER 28 OD X 2.5 ZINC Out of Stock	£11.50 (exc VAT) per HUND £13.80 (inc VAT) per HUND	- +
RWM16F	M16 5/8 FORM F WASHER 34 OD X 3.0 Out of Stock	£35.00 (exc VAT) per HUND £42.00 (inc VAT) per HUND	- +
RWM16FG	M16 5/8 FORM F WASHERS 34 OD X 3 GALV Out of Stock	£50.00 (exc VAT) per HUND £60.00 (inc VAT) per HUND	- +
RWM16FP	M16 5/8 FORM F WASHER 34 OD X 3.0 ZINC Out of Stock	£17.50 (exc VAT) per HUND £21.00 (inc VAT) per HUND	- +
RWM16FZY	M16 5/8 FORM F WASHER 34 OD X 3.0 ZINC & YELLOW Out of Stock	£16.80 (exc VAT) per HUND £20.16 (inc VAT) per HUND	- +
RWM20FP	M20 3/4 FORM F WASHER 39 OD X 3.0 ZINC Out of Stock	£45.67 (exc VAT) per HUND £54.80 (inc VAT) per HUND	- +
RWM22F	M22 7/8 FORM F WASHER 44 OD X 3.0 Out of Stock	£27.50 (exc VAT) per HUND £33.00 (inc VAT) per HUND	- +
RWM22FP	M22 7/8 FORM F WASHER 44 OD X 3.0 ZINC 2 In Stock for dispatch	£78.75 (exc VAT) per HUND £94.50 (inc VAT) per HUND	- +
RWM27F	M27 1" FORM F WASHER 56 OD X 4.0 Out of Stock	£1,000.00 (exc VAT) per HUND £1,200.00 (inc VAT) per HUND	- +
RWM27FP	M27 1" FORM F WASHER 56 OD X 4.0 ZINC Out of Stock	£42.60 (exc VAT) per HUND £51.12 (inc VAT) per HUND	- +
RWM30F	M30 1.1/8 FORM f WASHER 60 OD X 4.0 52 In Stock for dispatch	£295.80 (exc VAT) per HUND £354.96 (inc VAT) per HUND	- +
RWM30FG	M30 1.1/8 FORM F WASHER 60 OD X 4 GALV Out of Stock	£198.80 (exc VAT) per HUND £238.56 (inc VAT) per HUND	- +
RWM36FG	M36 1.3/8 FORM F WASHER GALV 16 In Stock for dispatch	£310.00 (exc VAT) per HUND £372.00 (inc VAT) per HUND	- +

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