250pc Assorted Metric Copper Sealing Washers Box - M5 to M17

250pc Assorted Box of Metric Copper Sealing Washers - 250 copper sealing washers to DIN 7603 Form A in fourteen sizes, with bores from 5mm to 17mm and outside diameters from 9mm to 23mm.

Copper crushes into the sealing face as the fitting is pulled up, giving a metal to metal joint that needs no compound or tape and takes no notice of how hot or how highly pressurised the line is. That is why copper rather than fibre goes on brake unions, diesel injector pipes and hydraulic fittings. Three figures decide whether one fits - the bore, the outside diameter and the thickness - and all three are listed against every size.

Box contents (250 pieces total, fourteen sizes)
25 x 5mm bore x 9mm x 1.0mm
25 x 6mm bore x 10mm x 1.0mm
25 x 6.5mm bore x 9.5mm x 1.0mm
20 x 8mm bore x 12mm x 1.0mm
20 x 9mm bore x 14mm x 1.0mm
20 x 10mm bore x 14mm x 1.0mm
20 x 10mm bore x 16mm x 1.5mm
20 x 12mm bore x 16mm x 1.5mm
20 x 13mm bore x 18mm x 1.5mm
20 x 14mm bore x 18mm x 1.0mm
15 x 14mm bore x 20mm x 1.5mm
10 x 15mm bore x 20mm x 2.0mm
5 x 16mm bore x 22mm x 1.5mm
5 x 17mm bore x 23mm x 1.5mm

Type
Copper sealing washer to DIN 7603 Form A. Sizes quoted as bore x outside diameter x thickness.

Please note
Copper washers seal best fitted new. One that has been crushed before will not seal as reliably again unless it is annealed first.

Suitable for
Banjo bolts and brake unions, diesel injector and fuel lines, hydraulic fittings, sump and gearbox drain plugs, carburettors and fuel pumps, cars, vans, tractors and machinery

Also known as copper crush washers, copper sealing rings, banjo washers, brake washers, injector washers, or a copper washer assortment box.