What is the purpose of a port plug with a crush washer?

A port plug is used to seal off unused threaded openings. The crush washer, typically made of soft metal, deforms slightly when tightened, creating a leak-proof seal against the mating surface.

What material is this port plug made from?

This port plug is made from 6061 aluminum alloy, which is known for its strength and light weight. It also has a black anodized finish for added durability and appearance.

What does the M10 x 1.25 size refer to?

M10 x 1.25 refers to the thread size. 'M10' indicates a metric thread with a 10mm nominal diameter, and '1.25' is the pitch, meaning there are 1.25 millimeters between each thread crest.

1 / 4

Specifications

Brand: Vibrant
Part #: 16661
UPC: 690092159986

Vibrant M10 x 1.25 Metric Aluminum Port Plug with Crush Washer

Name: Vibrant M10 x 1.25 Metric Aluminum Port Plug with Crush Washer
Brand: Vibrant
SKU: vibrant-vibrant-m10-x-1-25-metric-aluminum-port-plug-with-crush-washer-t14-31349
Price: 13.84 USD
Availability: BackOrder

$13.84

On Backorder — Expected to ship by Jun 7, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Vibrant M10 x 1.25 Metric Aluminum Port Plug with Crush Washer. Prevents leaks and keeps debris out of exposed ports.

Key Features

Fits M10 x 1.25 metric ports.
Constructed from durable 6061 aluminum alloy.
Features a black anodized finish.
Includes a crush washer for a secure seal.
Helps prevent leaks and contamination of exposed ports.
Backed by a one-year limited warranty.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

This is a Vibrant M10 x 1.25 metric port plug, made from 6061 aluminum alloy and finished in black anodize. It comes with a crush washer to help seal the port effectively. It's designed to prevent leaks and stop unwanted contaminants like dirt and debris from getting into exposed ports and lines on your engine or fabrication project.

Using a plug like this is a clean way to close off unused ports during custom builds or when replacing components. The aluminum construction makes it lightweight, and the included crush washer ensures a solid seal without needing special tools, making it a straightforward part to install.