20Pcs M12 Oil Drain Plug Gasket, Copper Crush Washer, Seal Ring by

These M12 crush washers are copper: 12 mm through the middle, 20 mm across, 1.4 mm thick, twenty to a set. The quietest part of an oil change — engine off, sump draining into the pan below — is when this little ring gets its one chance to be fitted right. Everything the engine does afterwards sits on top of that seal, no small responsibility for the least expensive item in the whole service.

Copper's case for the job

The supplier starts from copper ore and quotes a copper content of up to 99.5 per cent — note the "up to", which we leave exactly as worded. From there the claims stack up quickly: pure copper does not rust, the washer resists acid and alkali, and contact with oil will not corrode it. The durability bullet piles on: heat resistance, pressure resistance, a long-lasting sealing effect; every one of those arrives as an adjective rather than a number, a shortfall this page returns to below.

Twenty of one thing, on purpose

Nothing here is an assortment. All twenty washers carry the same M12 dimensions, which is how a workshop drawer should work when the same drain plug comes around every few months: you never fish for the odd size, you just take the next ring off the stack.

Key features

• Quoted at up to 99.5 per cent copper: the supplier's content figure, ceiling wording included.
• Does not rust: the supplier's flat claim for pure copper.
• Stands up to oil chemistry: acid and alkali resistance, with oil contact rated non-corroding.
• Heat, pressure, longevity: all three claimed for the seal, all three without figures.
• Single-size stack: twenty identical M12 rings, no sorting tray needed.

Specifications

• Plug thread: M12
• Diameter, outer: 20 mm
• Diameter, inner: 12 mm
• Ring thickness: 1.4 mm
• Copper content: up to 99.5 per cent, per the supplier
• Washers per set: 20, one size

The figures the durability bullet owes you

• "High temperature resistant" and "high pressure resistance" come with no temperature and no pressure figure attached; treat both as adjectives until numbers exist.
• "Up to 99.5 per cent" copper is a ceiling, not a floor — the supplier promises at most that purity, not at least.
• No torque specification and no vehicle list accompany the set; match your plug against the M12 figures listed here instead.
• The title trails off at "Seal Ring by" where a brand name once sat, and the description likewise names no maker.

Twelve millimetres is the whole of the decision here — take that measurement off the plug before you order — so this is the ring to grab when the drain bolt measures twelve millimetres.

Returns, Refunds, and Replacements Products that are received faulty, damaged, or not as described are eligible for a return, refund, or replacement in accordance with the Australian Consumer Law (ACL). We are committed to ensuring all products meet the standards of quality and reliability expected by our customers. However, please note that we do not accept returns or provide refunds for change of mind. We encourage you to carefully consider your purchase to ensure it meets your needs and expectations.

Delivery Timeframe

Please note that we cannot guarantee the exact date of arrival, and the delivery timeframes (excluding weekends and public holidays) are as follows:

For customers in Victoria, approximately 7-10 working days; For customers in NSW, SA, ACT, and QLD, approximately 9-12 working days; For customers in WA, NT, and TAS, approximately 9-12 working days.