2-1/2" Diam x 11/16" D; Sealed, waterproof; PC-rated; reflectorized lens; mount w/required grommet; 2-prong plug connection; 1-bulb incandescent Lowest Prices for the best Trailer Lights from Optronics. Sealed, 2-1/2" Round Trailer Clearance, Side Marker Light with Reflector - Amber part number MC57AB can be ordered online at etrailer.com or call 800-298-8924 for expert service.

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Sealed, 2-1/2" Round Trailer Clearance, Side Marker Light with Reflector - Amber

14 reviews 

Shipping Weight: 0.07 pounds


Trailer Lights > Clearance Lights > Submersible Lights > 2-1/2 Inch Diameter > Incandescent Light > Amber > Round > Recessed Mount > Optronics

Sealed, 2-1/2" Round Trailer Clearance, Side Marker Light with Reflector - Amber

Optronics Trailer Lights

(14 reviews)

Code:   MC57AB


Shipping Special

Shipping Weight: 0.07 pounds


Optronics Trailer Lights - MC57AB

2-1/2" Diam x 11/16" D; Sealed, waterproof; PC-rated; reflectorized lens; mount w/required grommet; 2-prong plug connection; 1-bulb incandescent

Sealed, 2-1/2" Round Trailer Clearance and Side Marker Light with Reflector - Amber

This sealed, round light can be used as a clearance or side marker light. This PC-rated light functions as both a marker and clearance light when mounted properly at a 45 degree angle. The amber lens is reflectorized which means a separate reflector is not needed to be DOT compliant. The light measures 2-1/2" in diameter by 11/16" deep. Lens and housing are one unit that is sonically sealed and waterproof, providing protection to the heavy-duty, long-life bulb. A mounting grommet and plug are required to complete the installation. A separate, industry standard, two-prong plug is used for the wiring connection, allowing for choice of several mounting and wiring options.

  • Amber, round light functions as clearance, side marker light
  • PC-rated light - functions as both a clearance and side marker when mounted at a 45 degree angle
  • Reflectorized lens is DOT compliant, eliminating need for separate reflector
  • Sealed, waterproof housing and lens unit
  • Heavy-duty, long-life bulb
  • Accepts industry standard, 2-prong plug
  • Requires mounting grommet and plug
  • Dimensions: 2-1/2" Diam x 11/16" D

Manufacturer Cross Reference
Light will work as an exact replacement for:
Uni Bond # SR2500A
Wesbar # 223223
Truck Lite # 10205Y
Grote # 45813
Peterson # 143A

Manufacturer Specifications

Round clearance or side marker light with reflectorized lens, eliminating the need for a separate reflector to meet DOT requirements. Features sonically sealed, waterproof lens and housing in a single unit. Accepts industry standard, 2-prong plug. Requires mounting grommet and plug for complete installation. Multiple mounting and wiring options available.

Dimensions of Light

MC-57AB Amber Sealed 2-1/2" Round Side Marker, Clearance Light with Reflectorized Lens by Optronics, Inc.

Video of Sealed, 2-1/2" Round Trailer Clearance, Side Marker Light with Reflector - Amber

Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.

Video Transcript for Optronics Trailer Lights MC57AB Review

Customer Reviews

Sealed, 2-1/2" Round Trailer Clearance, Side Marker Light with Reflector - Amber - MC57AB

Average Customer Rating:  4.8 out of 5 stars   (14 Customer Reviews)

2-1/2" Diam x 11/16" D; Sealed, waterproof; PC-rated; reflectorized lens; mount w/required grommet; 2-prong plug connection; 1-bulb incandescent

- MC57AB

by: Rich W.06/23/2014

I got this light in the mail, opened it, popped it in the rubber grommet plugged it in and my light problem was over. Great price for this light. My local auto part store wanted $7.95 for a 2" light. Great light,, great deal...Highly recommend. 137198

- MC57AB

by: Ralph11/24/2014

This is the replacement for what came from the factory. The lights are cheap and easy to replace. Just pop it out and unplug. etrailer was the first place I found this item. Always had good luck with etrailer. 162318

- MC57AB

by: George C.04/20/2015

Equal to or better than the same lights available locally, but at half to 1/3 of the local prices. Even paying shipping I save a lot. Delivery with E-Trailer is always timely, too. 186572

- MC57AB

by: Kermit Williams06/28/2012

Ordered lights for my skid steer trailer, was amazed how fast I recieved the product!! Got exactly what I ordered!! Very fast turn around. Thanks Kermit 45987

- MC57AB

by: Andy S08/10/2014

Very good price and fast delivery. I live in an area where it is almost impossible to find many of the things I need. Your company is just the ticket, Thanks 145570

- MC57AB

by: Gilbert S.11/01/2012

Best service I ever got!! Received my order much faster than expected. Everything worked perfect. 58645

- MC57AB

by: Jake03/17/2015

Quality product. Was as advertised and shipping was very fast as usual. 179069

- MC57AB

by: Dave02/19/2014

Just what I needed to get my snowmobile trailer well lit again. 116896

- MC57AB

by: Steve B07/23/2012

Great prices and quick shipping 49111

- MC57AB

by: Mike m05/01/2015

Great service and price 189238

- MC57AB

by: j02/24/2012

easy direct replacement 32495

- MC57AB

by: mule06/11/2014

received as ordered 135257

- MC57AB

by: Mark01/10/2014

Perfect replacement 112470

- MC57AB

by: Mike N06/26/2014

Superb! 137794


Ask the Experts about this Optronics Trailer Lights
Do you have a question about this Trailer Lights?

  • What Is Hole Size For Mounting 2 Inch Round Trailer Lights With Rubber Grommet
  • The item you selected, Sealed 2-1/2 Trailer Light, part # MC57AB, is a 2-1/2 inch light that will mount into a 3 inch hole using 2-1/2 inch grommet, part # A55GB. The hole size to mount a 2 inch round light flush mounted would be 2-5/16 inches. The grommet you would need for a 2 inch light would be 2 Inch Round Grommet, part # A54GB. If you are flush mounting your lights, the 2 inch light will sit inside the grommet. A 2 inch light similar to the one you selected is part # MC53AB. We...
    view full answer...

  • What Size Hole Is Needed For Mounting Optronics Trailer Light, # MC57AB, In A Rubber Grommet
  • To mount the Optronics Trailer Light, # MC57AB, in a rubber grommet you would use the Optronics 2-1/2 Inch Round Grommet - Flush Mount, # A55GB. This grommet will require a 3 inch mounting hole. To mount the Optronics Miro-Flex, Sealed, 4 Inch Round, Stop/Turn/Tail Light Trailer Light, # STL23CCRB, in a rubber grommet you would use the Optronics Rubber Grommet for 4 Inch Round Trailer Tail Lights, # A45GB. This will require a 4-1/2 inch mounting hole.
    view full answer...

  • Looking for Trailer Clearance/Marker Light to Replace Trucklite Model 10
  • According to my research, I have found that the Trucklite model 10 clearance/side marker light measures 2-1/2 inches in diameter. Because the Optronics # MC53AB measures 2 inches in diameter, it would not be a good replacement. The Optronics # MC57AB, with its 2-1/2 inch diameter, would be the correct replacement. If you need a mounting grommet, it is available as part # A55GB. The two pin wiring pigtail is also available as part # A46PB.
    view full answer...

  • Replacement Clearance Light with a Reflective Lens for a Horse Trailer
  • The Optronics light, MCL71AB, does not have a reflector in the lens. I made a short video that shows the light with the lens off. It would be a fairly water resistant light. A better option may be # MC35AB. It is about the same size and it has a reflector in the lens. It is not as low profile as the flush mount light you referenced. If you are not opposed to switching to round we have # MCL59AB or # MC57AB which has a reflector in the lens and can be flush mounted using harness #...
    view full answer...

  • Can Optronics Sealed 2-1/2 Inch Light be Mounted in a 2-7/8 Inch Hole
  • In order to install this light, you will need a grommet to fit the hole. We have a grommet for a 2-25/32 hole, which is just under 2-7/8 as well as a grommet that fits a 3 inch hole. If you can re-measure the hole with something that has 16th inch or 32nd increments we can get a more accurate measure of the hole. If it is a 2-25/32 inch hole, you would use grommet # A57GB. If you find it is a 3 inch hole, you can use part # A55GB. Both of these grommets will work with the MC57AB.
    view full answer...

  • Availability of Mounting Bracket for 2-1/2 Diameter Round Sealed Trailer Lights
  • We do indeed have a bracket designed for 2-1/2 inch diameter trailer lights, part # BK55BB. You would also need the rubber grommet, part # A57GB. The bracket and grommet would work with a 2-1/2 inch diameter lamps like part # MC57RB or # MC57AB.
    view full answer...

  • Marker Light to Replace Peterson 143 on 2007 Fleetwood Pop Up Camper
  • I did some research, and found that the Peterson 143 is a flush grommet mount lamp, not a flange mount. The lamp itself is 2-1/2 inches in diameter. The Optronics # MC57AB would be a comparable replacement. You'd also need a # A57GB grommet and a # A46PB pigtail. If the # MC57AB doesn't match your lamp, please send me a reply email with a photo of the lamp attached, and I'd be happy to try to find a replacement for you.
    view full answer...

  • What Size Hole Drilled to Install the Side Marker Light Part # MC57AB with Round Grommet # A55GB
  • The recommended grommet to go with the Side Marker Light Part # MC57AB that you referenced is the Round Grommet # A55GB which will require a 3 inch hole.
    view full answer...

Do you have a question about this Trailer Lights?

Info for this part was:

Expert Research:
Patrick B

Expert Research:
Jeff D

Expert Research:
Reno H

Updated by:
Laura H

Installed by:
Cole B

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