AULDAY 16mm Copper Oil Drain Plug Crush Washers for Subaru — 100-Pack, Leak-Resistant Seal

These are 100 copper 16mm oil drain plug crush washers sized to replace Subaru drain plug gaskets (OEM 803916010 and related part numbers) for routine oil drain maintenance.

Keep a supply of correctly sized crush washers on hand to ensure a clean, leak-free oil change. These AULDAY copper gaskets are made to match the 16mm inner diameter used on many Subaru transmissions and oil pans, including models from roughly 2010–2022. The set includes 100 washers so you can change the gasket each time you remove the drain plug without reusing a deformed seal.

Which Subaru models and part numbers do these washers fit?

They are designed to replace OEM drain plug gasket numbers such as 803916010 and cross-references like 095159, 21677, and 17000700. Common compatible vehicles include Ascent, BRZ, Crosstrek, Forester, Impreza, Legacy, Outback, and WRX across several years.

• Fits many Subaru models from approximately 2010–2022
• Direct replacement for OEM 803916010 and listed cross-reference numbers
• Intended for transmission and engine oil drain plug applications

What are the exact dimensions and material of each gasket?

Each washer is precision-sized so it compresses reliably under the drain plug head and forms a leak-resistant seal. They are copper crush washers with dimensions chosen to match Subaru drain plug sealing surfaces.

• Inner diameter (ID): 16 mm / 0.62 in
• Outer diameter (OD): 20 mm / 0.78 in
• Thickness: 2.25 mm / 0.08 in
• Material: copper crush-style gasket for dependable malleability

How should I use and replace these crush washers during maintenance?

Replace the crush washer each time you remove the drain plug to avoid leaks; copper deforms to fill gaps but will not reseal properly when reused. Tighten the drain plug to the vehicle manufacturer’s torque specification and inspect for seepage after the first short drive.

• Always discard the old washer and install a fresh AULDAY gasket
• Tighten drain plug to Subaru torque spec—do not overtighten
• Check for leaks after refilling oil and running the engine briefly

Who is this for? DIY mechanics, independent repair shops, and fleet owners who service Subaru engines and transmissions will appreciate a bulk pack of correctly sized drain plug gaskets. This 100-piece set reduces waste, saves repeated ordering, and ensures you have the right copper crush washer for routine oil and transmission drain procedures. Backed by a 12-month warranty and lifetime technical support from the seller, these washers are intended for routine maintenance use; follow vehicle manufacturer instructions for torque and service intervals.