1 3/8" Rubber Knock Out Plug, Panel Hole Plug, Fits 1 3/8" Hole & 1/8" Materials
 

1 3/8" Rubber Panel Plug – Solid Silicone Blind Knockout Grommet

1-5/8" OD, Fits 1/8" Panels

Each quantity option contains the same part in a different pack size. Choose what fits your job.
Choose a larger pack to keep this common item on hand for future service work.

Description

These solid silicone rubber panel plugs snap into a 1-3/8" hole to seal unused openings in sheet metal and body panels. The flat head provides a clean, flush finish while the molded groove locks securely into 1/8" thick material.

Designed for repair and service work, these blind knockout plugs help block dust, moisture, and debris in automotive panels, electrical enclosures, and fabricated equipment. Silicone rubber offers reliable flexibility and long service life in indoor and outdoor light-industrial environments.

Specifications

  • Hole fit: 1-3/8" diameter hole

  • Outside diameter (OD): 1-5/8"

  • Panel thickness fit: 1/8"

  • Overall thickness: 9/32"

  • Material: Black silicone rubber

  • Hardness: 60–65 Shore A

  • Design: Blind panel plug / knockout plug

  • Head style: Flat, flush-mount

  • Function: Hole sealing, edge protection, dust control

  • Surface types: Metal, plastic, composite panels

  • Use environment: Indoor / outdoor light industrial

  • Operating temperature: -40°F to 400°F (-40°C to 204°C)

Key Uses

  • Sheet metal panel hole sealing

  • Electrical enclosures and junction boxes

  • Automotive body panels and firewalls

  • Fabrication and welding shop panel finishing

  • Equipment housings and service access holes

Package Options

  • Multiple pack sizes available.

  • Please use the drop-down box for needed quantity.

  • Second quantity option offers the best balance of price and quantity.

Service

Ships from California, USA warehouse
Same-day handling on most weekday orders
Tracking uploaded quickly after shipment
51,000 buyers' reviews
99.8 percent positive feedback
Free shipping with tracking included

Product Specs
Item Thickness: 
Shape: Round
MPN: na
Item Length: NA
Gauge: NA
Screw Size: NA
Drive Style: Push-in
Unit Type: Unit
Mandrel Material: NA
Grip Range: 1/8"
Number in Pack: Various pack sizes available
Unit Quantity: 1

We ship every day Monday - Friday.

PayPal is the preferred payment method.

We hope you will love your purchase, however if you need to return it, we have a 60 day return policy.

We hope you will love your purchase, however if you need to return it, we have a 60 day return policy.

We hope you will love your purchase, however if you need to return it, we have a 60 day return policy.

We hope you will love your purchase, however if you need to return it, we have a 60 day return policy.

We hope you will love your purchase, however if you need to return it, we have a 60 day return policy.

We hope you will love your purchase, however if you need to return it, we have a 60 day return policy.

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This solid silicone blind panel plug is designed to close unused holes in sheet metal panels, enclosures, and equipment housings. It installs with a push-in fit and locks into 1-3/8" holes in 1/8" thick panels for a flush, finished appearance.

The silicone rubber construction absorbs vibration, resists heat, and maintains flexibility in demanding environments. It helps prevent dust intrusion, moisture entry, and sharp-edge exposure in electrical panels, fabrication work, and vehicle body panels.

Used by fabrication shops, electrical contractors, auto body technicians, and maintenance teams for professional panel finishing and knockout closure. Designed for MRO teams and technicians working in inch and metric systems.