Rubber Grommet for 4" Round Trailer Lights - PVC

Rubber Grommet for 4" Round Trailer Lights - PVC

Item # A45GB

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Accessories and Parts A45GB - 4 Inch Diameter - Optronics
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  • Trailer Lights
  • Mount Parts
  • Grommet
  • Optronics
  • Round
  • 4 Inch Diameter
This black PVC grommet allows you to flush mount your Optronics 4" round trailer light. Shock mount protection extends the life of the lamp. Recessed mount. Durable plastic construction. Call 800-298-8924 to order Optronics accessories and parts part number A45GB or order online at etrailer.com. Free expert support on all Optronics products. Guaranteed Lowest Price and Fastest Shipping for Rubber Grommet for 4" Round Trailer Lights - PVC. Accessories and Parts reviews from real customers.


  • All Info
  • Reviews (108)
  • Q & A (88)
  • Videos (2)
  • Photos
  • Why etrailer?

Optronics Accessories and Parts - A45GB

This black PVC grommet allows you to flush mount your Optronics 4" round trailer light. Shock mount protection extends the life of the lamp. Recessed mount. Durable plastic construction.


Features:

  • Grommet allows you to flush mount your Optronics 4" round trailer light
    • Designed to fit Optronics 45 Series lights (sold separately)
  • Shock mount design cushions light against vibration and jolting
  • Open back provides easy access when wiring
  • Light snaps into grommet for a finished look
  • Durable PVC construction
  • Recessed mount installation - hardware not included
    • Requires 4-1/2" cutout


Specs:

  • Outer diameter: 5-3/8"
  • Mounting depth: 1-1/16"


Optronics PVC grommet for 4 Inch Round Flush Mount Lights Diagram

Manufacturer Cross-Reference

Grommet will work as an exact replacement for:

  • Uni Bond GR4000
  • Wesbar 224088
  • Truck Lite 40700
  • Grote 91740
  • Peterson 426-18
  • Bargman 40-01-020


A45GB Optronics Rubber Grommet for 4" Round Sealed Trailer Tail Lights - Recessed Mount

Alternate part number: A-45GB






California residents: click here


Video of Rubber Grommet for 4" Round Trailer Lights - PVC


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




Video Transcript for Optronics Rubber Grommet Review

Today on our gooseneck flatbed trailer we'll be installing the Optronics rubber grommet for 4 inch round trailer tail lights, part number A45GB. As you'll see here on the grommet, there's a lip built into the grommet itself that'll go around the steel portion of the trailer. As you push the grommet in place, the lip will go through the steel, holding the grommet into place. This rubber grommet is designed for flush mounting 4 inch round lights, and by being rubber it gives some shock protection for extended lamp life. You'll also notice that the back side of the grommet is open, allowing for easy access to the wiring. Time to install the grommet in the trailer itself. You'll start by pushing in the top portion of the grommet, and working the grommet around, making sure that the steel is located within the inner lip and the outer lip of the rubber grommet. Once the steel is in this position, it'll hold the grommet in place. That's all there is to it to installing the Optronics rubber grommet for 4 inch round trailer tail lights, part number A45GB, on our gooseneck flatbed utility trailer. .


Customer Reviews

Rubber Grommet for 4" Round Trailer Lights - PVC - A45GB

Average Customer Rating:  4.7 out of 5 stars   (108 Customer Reviews)

This black PVC grommet allows you to flush mount your Optronics 4" round trailer light. Shock mount protection extends the life of the lamp. Recessed mount. Durable plastic construction.

- A45GB
by:

Arrived on time, as expected from 5-star provider, thanks 472987



- A45GB
by:

I ordered a set of tail lights for my boat trailer and they shipped fast. The customer service is really great too. The product is high quality and I'm very happy with it. The only issue I had with etrailer.com is they charge far too much for shipping and they only use UPS. So people like me who have a frequent shipper contract with other freight and delivery companies can't get it shipped at a reasonable cost. It is unreasonable to me to pay just as much for shipping as the product cost. Etrailer if you are listening, please ship small things in USPS flat rate boxes and allow customers to use their frequent shipping agreements with other delivery services. 637174



- A45GB
by:

Looks good, should work, just haven't used it yet...... 700392



- A45GB
by:

Met our expectations. Very happy 675377



- A45GB
by:

Fast service...another good products...what more can a person ask for. 675072



- A45GB
by:

Quality products. Quick shipping. 674542



- A45GB
by:

Exactly as described and what I was looking for. 657306



- A45GB
by:

Perfect fit...etrailer does a great job, always! 655329



- A45GB
by:

Love your products , this my third orde r! 654242



- A45GB
by:

Communication with etrailer has been really good.This item was back ordered and they let us know immediately. The grommets fit well into the holes and the lights pop in snuggly. 652576



- A45GB
by:

I fought with these PVC grommets for 10 minutes then gave up. Waaay to stiff. I'm going to stick with rubber grommets and change them out when they start cracking and shrinking. 644231



- A45GB
by:

Is exactly what I needed. 635581



- A45GB
by:

works great 635500



- A45GB
by:

I’ve used etrailer on multiple occasions and have been completely satisfied with their service and professionalism . 633121



- A45GB
by:

Very satisfied 608103



- A45GB
by:

Another good product 602864



- A45GB
by:

Best product, good quality 599522



- A45GB
by:

Worked as advertised 597077



- A45GB
by:

great 583390



- A45GB
by:

Great product! Great delivery! Great customer service! Need I say more? Patrick 579540



- A45GB
by:

All around good experience! Person I dealt with was very knowledgeable about their products and order was received as expected. 556737



- A45GB
by:

Excellent service and attention to detail. I would highly recommend purchasing from etrailer. Prices are great and they have a wide selection of information that helps with the purchase decision. Very impressed. 551655



- A45GB
by:

Hi guys, I'm usually the one answering reviews These guys are great! My client emailed the link & told me to order these for our horse trailers. They've held up, to the point, we're not even close to needing to replace them. We haul quite a bit. These lights have been tried & true, day & night. When you're hauling a lot of livestock, you want people that have no clue what that entails, to see your lights well before they get near your livestock ; these lights do the job perfect! We've outfitted 3 separate trailers with this company. We restored wires, lights, & pretty much everything along those lines ;from a 2 horse, to a large stock, & a gooseneck. All the parts come quickly, are all there, & work & fit great. What more can you ask for?! 517861



- A45GB
by:

Easy installation and work great! 515036



- A45GB
by:

Converting an older home made trailer to LED lighting. These high quality parts worked great. Received order within 3 days. Thanks 501815



- A45GB
by:

It’s a rubber grommet, how could you screw it up 492550



- A45GB
by:

Work great 485032


Comments

Great Fit

Blake C - 03/15/2019

50549

- A45GB
by:

Great prices just what I needed fast delivery thanks 467416



- A45GB
by:

Great Product & Service! 457401



- A45GB
by:

These were a joy to install. They really make for an easy job for installing the lenses. They make a great finished look and provide a good secure seating for the lights. I have no regrets getting these - They sure were an upgrade to the old riveted lights that they replaced. Definitely recommend them. 455197



- A45GB
by:

product arrived as advertised 453516



- A45GB
by:

Great product got it fast 441054



- A45GB
by:

No complaints here! Product was perfect and delivered faster than I expected! I bought these grommets for a halloween costume diver suit. Nothing to do with trailers at all. :) 436653



- A45GB
by:

Product was delivered quickly and was exactly what I ordered. 436561



- A45GB
by:

Loose fit in bracket with light pushed in it. 427460



- A45GB
by:

I ordered the STL101RB Trailer Tail Light - Stop, Tail, Turn, Backup - LED to replace the standard tail lights on my Yamah Drive G19 golf cart. They replaced to stock ones perfectly as a neat way to add a backup lights for a custom feature. The backups led are actuated by the reverse switch on the dash. It should be noted that the ground terminal on the two wire pigtail connection is not wired internally to the backup LEDs. They rely on the ground supplied by the three wire pigtail. Not a big deal, but worth noting. It throws a curve when bench testing. These lamps add a nice custom touch! 423711



- A45GB
by:

ok 413009



- A45GB
by:

Quick service, great product 406548



- A45GB
by:

just received my order have not installed yet but look like they will work 387513



- A45GB
by:

Excellent product - Great company. I will order from etrailer.com again. 383247



- A45GB
by:

Exactly what we needed. Arrived timely. 380723



- A45GB
by:

My 96 Chevy ramp truck, (car hauler) has 12 total lights mounted in these rubber rings and several them were cracked and aged. These look and fit well. I'd buy them again if I needed them. 379255



- A45GB
by:

Prompt delivery...great product 371046



- A45GB
by:

no problem with anything we have gotten from etrailer gets equipment back on road quickly 369909



- A45GB
by:

great pricing along with quick service 362683



- A45GB
by:

A+ 349539



- A45GB
by:

The products came in quicker than I expected and are of good quality. I am very satisfied with this company 344845



- A45GB
by:

Works great 343623



- A45GB
by:

The product arrived quickly and was just as described. My trailer is older and I was having trouble finding replacements for the tail lights. Their sales rep, Cathy T., was knowledgeable and friendly. The next time I need parts for my horse trailer, I will go directly to etrailer. 339647



- A45GB
by:

Excellent quality 335526


50
108
Show More Reviews

Ask the Experts about this Optronics Accessories and Parts

Do you have a question about this Accessories and Part?


  • Replacement Tail Light For Forest River Georgetown XL RV
  • I'd be happy to assist you. It sounds like you need the Sealed, Flush Mount Tall Rectangle LED Trailer Stop, Turn and Tail Light, Grommet and Plug, 12 Diode # STL34RB but most of the pictures I see have round tail lights like the Sealed, 4" Round, LED Stop/Turn/Tail light, 21 Diode - Red # STL55RB. If this is not the correct part, then send me a photo with the measurements of the light and we will get you what you need. The numbers and letters that are actually printed on the light...
    view full answer...

  • Will Optronics GloLight LED Tail Light # STL101RB and Grommet Fit 4-3/8 Inch Cutout
  • The GloLight LED Trailer Tail Light # STL101RB referenced in your question, when used with the Rubber Grommet # A45GB, is designed to fit a 4-1/2 inch cutout on the trailer. Since your opening is just a tiny bit smaller at 4-3/8 inches, you should have no problem fitting the grommet on your trailer and you shouldn't have to make any additional modifications. I have attached a couple short video demonstrations on these products that you can also check out.
    view full answer...

  • Recommended Trailer Tail Lights for 4.25 Inch Opening
  • The LED Trailer Tail Light # STL42RMB has screw mounting holes that are 4-1/4 inches on center. The smallest hole this light will fit is 4 inches. You will have difficulty mounting this light as your opening matches the mounting hole locations so you won't get proper hold. You may want to use the Rubber Grommet for 4" Round Trailer Tail Lights # A45GB along with the # STL55RB which won't use any screws to mount. You will also want the 3 wire pigtail # A45PB.
    view full answer...

  • Brightest Round LED Backup Trailer Light
  • The Light Guide LED Backup Light # BUL603CB you referenced is certainly a nice, bright LED backup light, but the brightest is the GloLight LED Backup Light for Truck or Trailer # BUL101CB, as you can see by the accompanying photo. This light requires Grommet # A45GB and Right Angle 2-Wire Pigtail # A49PB. This does come packaged together with the GloLight LED Backup Light w/ Grommet and Pigtail # BUL101CKB. I have added links to video reviews for you as well which I highly recommend...
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  • Grommet for Optronics 4 Inch Round Recessed Mount Trailer Lights
  • For the Optronics Trailer Tail Light - Stop, Tail, Turn, Backup - LED # STL201RB, you will want the Rubber Grommet for 4" Round Trailer Tail Lights # A45GB.
    view full answer...

  • Replacement Round LED Trailer Tail Light for a Peterson Round Tail Light
  • The Peterson part number # 420-15 that you referenced is a replacement lens for the Peterson Round Trailer Tail Light # 431800 which has a 3-3/4" diameter. Although we don't have an exact match to this in LED we do have slightly larger sizes of round tail lights that come as LED. If you are wanting to go with one from Peterson then we have the LED Trailer Light # M826R-7 which has an overall diameter of 5-1/2" but the light diameter is only 4-1/4". The grommet # 426-18 and 3-prong plug...
    view full answer...

  • Replacement Tail Light for 2009 Ranger Boat Trailer
  • Sometimes it is possible to replace a broken trailer light with one that uses a different type of installation but since we offer a very wide range of lights you may very well be able to find an exact OEM-style replacement. It sounds like you have a light like # STL42RB which has a 3-hole mounting flange. I linked our main page for trailer tail lights of all shapes and sizes. On the page you can simply click on the filters for light shape, light type (LED or standard bulb), lens color,...
    view full answer...

  • Flush Mount, Submersible LED Back Up Light Recommendation for a Trailer
  • The brightest LED light, flush mount, submersible, that can be used as a back up light, is going to be the round light # BUL23C24B. But this is a 24 volt light and it has 27 diodes. For a 12 volt back up light that is flush mount and submersible would be # BUL10CB or # BUL11CB. For the BUL10CB that you have referenced, you will also need grommet # a70gb, and a wiring harness # A49PB. For the round light # BUL11CB, you would need grommet # A45GB. and harness # A45CB.
    view full answer...

  • Replacement 4 Inch by 2 Inch Round Tail Light for a 2006 Damon Intruder RV
  • The closest match we have to your existing Glo-Brite taillight is the Sealed, 4 inch Round LED Trailer Stop, Turn and Tail Light, Flush Mount, 3-Function, 12 Super Diode, # STL23R-24B. It measures 4 inches in diameter and 1-15/16 inches deep. To install this light, you would also need Rubber Grommet for 4 inch Round Trailer Tail Lights, # A45GB, and Straight 3-Wire Pigtail for Sealed Trailer Stop, Turn and Tail Lights, # A45PB. Since this light is an LED, if you determine that it is...
    view full answer...

  • What Size Hole is Required to Install Optronics Grommet A45GB
  • The grommet part # A45GB that you referenced requires a 4-1/2 inch diameter hole be cut to install. I looked up the light you mentioned and it is a 4 inch diameter light like what this is designed to fit. I attached an install video for you to check out as well.
    view full answer...

  • Compatibility of Optronics Trailer Tail Light # STL43RB With Trailer 4-1/2-Inch Opening
  • The Optronics Trailer Light # STL43RB that you referenced can mount using rubber grommet # A45GB. But this light's overall diameter is 4-5/16-inches so this light unit would be too large to allow for grommet mounting in your trailer's 4-1/2-inch opening. However, my contact at Optronics confirmed that this mounting grommet # A45GB will fit a 4-1/2-inch rough opening and with it you can use the other light you referenced, part # STL101RB, which is 4-inches in diameter. If you need a wiring...
    view full answer...

  • Recommended Grommet for Optronics 4 Inch Round LED Light # STL55RB
  • Both the Rubber Grommet # A45GB and the Notched Rubber Grommet # A45GNB that you referenced will fit and work well with the Optronics 4" Round LED Light # STL55RB. The only difference between the two grommets, as you mentioned, is the notched cut out in the lower portion of the unit. This is not necessary for wiring or fitment, but it will allow for a bit of an easier install.
    view full answer...

  • Are there Replacement Tail Lights for a 1982 Scamp Trailer
  • In order to determine which replacement lights will fit your 1982 Scamp trailer, you will need to find the manufacturer and model number of the light assembly. This could involve removal of the assembly. If you see numbers on the lens, those are not the correct numbers. If you cannot find any manufacturer/model number information, you will need to measure the diameter of your existing tail lights and any other dimension that you can. You will also need to determine how they mount to...
    view full answer...

  • What Size Hole Is Needed For Installation Of Optronics Flush Mount 4 Inch Round Light # STL23R-24B
  • If you are using the Optronics Rubber Grommet for 4 Inch Round Trailer Tail Lights, part # A45GB, with the Optronics Sealed, 4 Inch Round LED Trailer Stop, Turn and Tail Light, Flush Mount, part # STL23R-24B, you will want to drill a 4-1/2 inch cutout. This grommet will allow you to flush mount 4 inch round lights to your trailer. If you are needing the wiring for the light I have both a right angle pigtail and a straight pigtail available. The Optronics Right Angle 3-Wire Pigtail, part...
    view full answer...

  • How to Remove Tail Light That Has Rivets Holding the Grommet in Place
  • It all depends on how the light installs. If it is like the Optronics part # ST45RB that installs with the grommet # A45GB then you should be able to remove it without removing the grommet. You may need access behind the light to do this though. If your tail light is more like the Optronics part # ST40RB though where the grommet is part of the light then you will need to remove the rivets by drilling them out and then use new rivets or even screws to install the new tail light (or the...
    view full answer...

  • Size Hole Needed to Install 4 inch Trailer Taillight that is Flush Mounted
  • When used with the # A45GB grommet, a 4-1/2 inch diameter hole is needed to flush-mount a 4 inch taillight.
    view full answer...

  • Installing New Trailer Lights and Wiring on a Horse Trailer
  • There isn't a kit available for what you are looking for, but you can still piece everything together. For grommets to use with the # ST45RB you would want the part # A45GB and then for a pigtail you would want the part # A45PB. Often times, people will run the wires from a 7-way such as yours to a junction box like part # 38656. From there, they will run the standard wire colors to the trailer lights, brakes and battery. I have attached a photo that shows how this setup works in...
    view full answer...

  • Installation Assistance With Mounting Hole Dimensions Optronics GLOLight LED Stop/Turn/Tail Light
  • To install the Optronics GLOLight LED # STL101RMB you will also need grommet # A45GB. There are two mounting options for this LED light. The first one is using Optronics grommet # A45GB and mounting directly into your 1998 Jeep Wrangler. The other option is using the Optronics Mounting Bracket # BK45BB. If you decide to use the mounting bracket, you will still need the grommet as well. If you are mounting using the grommet only the grommet opening is 4-1/2 inches. When cutting...
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  • Mounting Hole Size for Optronics 4 Inch Round Back Up Lamp # BUL53CB
  • When used with the # A45GB grommet, a 4-1/2 inch diameter hole is needed to flush-mount the Optronics 4 inch Round LED Trailer Back Up Light # BUL53CB.
    view full answer...

  • Recommendation for 24 Volt Trailer Lights
  • We do have some lights that are designed to work on a 24 volt system but none that are available in a kit. I recommend using light # STL23R24B. There are a few ways to mount this light. You can use a grommet and flush mount it using # A45GB. Or you can surface mount it with a bracket, # BK45BB. You will also use a wiring harness, # A47PB.
    view full answer...

  • Measureing Light Grommet Size for Round Trailer Lights
  • I am sorry but at this time we do not stock a light grommet for a 3 inch round light. I checked with our supplier and they do not have a grommet for a 3 inch light either. If you are measuring the hole the grommet and light mounts in then you may have a 2-1/2 inch light and the mounting hole is 3 inches or close to it. If you measure the diameter of the light itself, this measurement will be the measurement you will need to select the proper grommet for your application. Our grommets...
    view full answer...

  • What Size Hole is Required for Installing Black Rubber Trailer Light Grommet # A45GB
  • We have actually had this question before and we determined that the Black Rubber Grommet, # A45GB, mounts in a 4 1/2 inch diameter hole. It is compatible with a light like # STL23RB. You will also need a wiring harness like # A47PB.
    view full answer...

  • Replacement 4 Inch Reverse Lights to Replace Truck Lite Stop Turn Lights
  • If the cut out diameter of your vehicle is 4-1/2 inches then you can install the part # STL55RB in place of what you have with the grommet part # A45GB. For a similar clear version of this light you would want the # BUL43CB.
    view full answer...

  • What is the Brightest 12 Volt Fully Submersible Backup Light Available
  • If you are looking for a round backup light then I recommend part # BUL53CB but if you are looking for an oval backup light then I recommend part # BUL52CB. Both of these backup lights are completely submersible. The round light has 36 diodes with a 275 candella rating and the oval light has 36 diodes with a 175 candella rating therefore the round light will be a bit brighter than the oval light. In order to mount the round light you will also need part # A45GB or part # A70GB for the...
    view full answer...

  • What Size Hole Would Clearance Light STL13RB Fit
  • If the box you referenced has a hole that is 4-1/2 inches in diameter then yes, the light part # STL13RB will fit it with the grommet # A45GB.
    view full answer...

  • Hole Size Information Needed for Mounting Trailer Light Grommet A45GB
  • It doesn't really have a wall thickness requirement. As long as the hole is 4-1/2 inch in diameter this will fit and work well. It is compatible with a light like # STL23RB. You will also need a wiring harness like # A47PB.
    view full answer...

  • Can Bulb be Replaced on Peterson Red Flush Mounted Sealed Turn Signal Light 435800
  • Peterson brake/turn signal light # 435800 is sealed and cannot be opened up to change out the bulb. I pulled one from the warehouse to verify this and cannot get the lens off (without breaking it) to access the bulb/interior of the light. What I recommend is to use an LED light, # STL43RB, because the LEDs will last much longer than a regular incandescent bulb. For a grommet use # A45GB and for a wiring harness use # A45PB.
    view full answer...

  • How to Mount the Light Guide LED Trailer Tail Light Part # STL603RB
  • Yes! In order to mount the Light Guide LED Trailer Tail Light part # STL603RB you are going to want to use the Rubber Grommet for 4" Round Trailer Tail Lights part # A45GB. I have attached an install video of this grommet for you as well. In addition to the grommet you will also need the 3-Wire Pigtail part # A47PB. If you need butt connectors you can use part # DW05743-5.
    view full answer...


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Info for this part was:

Expert Research:
Jackie C
Expert Research:
Michael L
Expert Research:
Michael H
Expert Research:
Jameson C
Video by:
Andrew K
Installed by:
Kathleen M
Updated by:
Rachael H
Updated by:
Brian T
Video Edited:
Chad S

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