Home / Plumbing / Compression / Large F 1″ Brass Backnut Large F 1″ Brass Backnut£0.07 This product is available for pickup in Orpington. Large F 1" Brass Backnut quantity Delivery Store Collection SKU: 35310WC01 Category: Compression Product ID: 6940 Reviews Related products 28Mm Copper Olives £0.34 Add to basket Sale! 20Mm X 15Mm Poly Shank Adaptor £7.96 Original price was: £7.96.£5.99Current price is: £5.99. Add to basket 15Mmx10Mm-3 Part Reduc Set £0.62 Add to basket 22Mm Copper Olives £0.22 Add to basket