Workshop Warehouse Copper Sealing Washers – Metric M12 X 16 X 1.5 (HCU1216)

Description

Genuine Workshop Warehouse · Part no. HCU1216

Workshop Warehouse HCU1216 copper sealing washers are the M12 x 16 x 1.5 size: 12mm bore, 16mm outside and 1.5mm thick, made to DIN 7603A. They sit under an M12 plug or union and flatten a little on tightening to make an oil- or fluid-tight seal, the usual job being a sump or gearbox drain plug at service time.

Good to know

• Should I reuse the old washer at an oil change? No; once crushed it has done its job, and a fresh copper washer each time costs little and avoids a slow drip from the sump plug.
• Is my plug M12? Measure the thread across its outside; around 12mm means M12, but also measure the old washer's outside diameter, since plugs of the same thread can use washers of different widths.
• How tight should the plug go? To the torque in the handbook or workshop manual; overtightening strips the thread in an alloy sump, which is a far bigger repair than a washer.

Which one?

If your plug takes a different size, the Workshop Warehouse Copper Sealing Washers – Metric (HCU1520) are another DIN 7603A copper size; for a rubber-faced seal on hydraulic fittings, see the Workshop Warehouse Bonded Seals (Dowty Washers) Metric (AB107).

Key features

• M12 x 16 x 1.5 copper washers
• DIN 7603A
• Crush to seal oil and fluid joints
• Corrosion resistant copper
• Conducts heat and electricity well

Specification