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Master Lock Covered, Solid Body Padlock - 3/16" Diameter Shackle

Master Lock Covered, Solid Body Padlock - 3/16" Diameter Shackle

Item # 131D
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Master Lock Universal Application Padlock - 131D
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Guard your gear against theft with this hardened steel padlock. The lock has a scratch-resistant vinyl coating and offers 4-pin tumbler security to deter lockpicking. Includes convenient, color-coded key. Lowest Prices for the best padlocks from Master Lock. Master Lock Covered, Solid Body Padlock - 3/16" Diameter Shackle part number 131D can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (16)
  • Q & A (44)
  • Videos (1)
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Master Lock Padlocks - 131D

  • Master Lock
  • Universal Application Padlock
  • 3/16 Inch Diameter
  • Keyed Unique
  • Steel

Guard your gear against theft with this hardened steel padlock. The lock has a scratch-resistant vinyl coating and offers 4-pin tumbler security to deter lockpicking. Includes convenient, color-coded key.


  • Corrosion-resistant, hardened steel construction ensures strength and durability
  • Stylish, scratch-resistant vinyl covering
  • 4-Pin tumbler security deters lockpicking
  • Color-coded key includes black cover for easy identification on your key ring


  • Lock body: 1-3/16" wide
  • Shackle diameter: 3/16"
  • Shackle opening: 5/8" tall x 9/16" wide
  • Limited lifetime warranty

131D Master Lock Covered, Solid Body Padlock - 3/16" Diameter Shackle

Video of Master Lock Covered, Solid Body Padlock - 3/16" Diameter Shackle

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

Video Transcript for Master Lock Solid Body Padlock Review

Today we'll be taking a look at the Master Lock covered solid body padlock. That's part number 131D. This is a really nice lock. It will help guard your gear against any theft. It's got a really nice hardened steel padlock to it. The lock has got a nice scratch resistant vinyl coating.

It also offers a 4-pin tumbler security to deter any lock picking. It also includes a convenient color-coded key so as you see here it matches with the actual padlock itself. Also comes with two keys so either if you misplace one or if you are giving it to a spouse or a significant other, they'll be able to have that too. It just pops right open like that as you can see. It is also corrosion resistant. It's got this nice hardened steel construction which insures strength and durability. It's kind of a nice stylish thing that will go with any of your things such as a bag at the airport, or locking up your fence, going to the gym and taking this and locking up your gym locker.

Today we're actually going to show you an application on a trailer. We're going to go ahead and put these on some wheel chocks so let's go ahead and grab those. We're here at our trailer. We've got our wheel chock in place already. We have these in place just to make sure that the trailer doesn't maybe roll down the hill or maybe if someone might roll off of there without you knowing. We're going to go ahead and take our Master Lock slide it into place and pop it on just like we would any regular lock that we have.

It is now in place and as you can see with that now in place, we won't be able to pull up on this and with one of our two keys just slide it into place whenever we're ready to move our wheel chocks. Just like a lock on your luggage, it will pop right off. That will complete today's look at our Master Lock Covered Solid Black Padlock, part number 131D. .

Customer Reviews

Master Lock Covered, Solid Body Padlock - 3/16" Diameter Shackle - 131D

Average Customer Rating:  4.4 out of 5 stars   (16 Customer Reviews)

Guard your gear against theft with this hardened steel padlock. The lock has a scratch-resistant vinyl coating and offers 4-pin tumbler security to deter lockpicking. Includes convenient, color-coded key.

- 131D


- 131D

Seems well-made and worked well. Not heavy-duty - simply keeps the honest people honest. 937084

- 131D

Easy to use. Well made and a solid bar! 936528

- 131D

This lock fits perfect in my swagman bike carrier to prevent bike theft. Also a great price. 913787

- 131D


- 131D

Package arrive and heard from Carol right away ... Love the swagman two bike carrier hitch type. Would buy again from etrailer Thanks Carol 814520

- 131D

Very solid hitch. Arrived in perfect condition with all the hardware needed. I watched the installation video for installation on my 2013 Taurus which was a big help. The installation went perfectly with only slight drilled hole modifications for bolt alignment. I did the installation by myself, and did not have the car on a lift, so it took about an hour and a half which was not bad, as most of the time was just disconnecting the exhaust and positioning the hitch. I would not hesitate buying another hitch for my Chevy and if i do, it will come from etrailer. Great company, EXCELLENT communications, and very fast shipment. Couldn't be happier. By the way, I also purchased the locking hitch pin, a bike rack, and padlocks all from etrailer. Very happy with these purchases too!!!!! If you are looking around for a better deal, just stop, and buy here, you won't regret it. 803938

- 131D

I use to lock my hitch bolt to my receiving hitch, this way I know my bike carrier will be on my car when I get back from a ride!! John K 732193

John K - 12/14/2020


- 131D

It fits my BikeWing; however, it wouldn't take much for a determined bike rack nabber to snip it. 650162

- 131D

I thought that they were going to be a more standard size and they arrived being much smaller than anticipated. 644357

- 131D

Fast shipping order complete in great shape This is a great Bike Rack using to haul a Tndem Bike 425509

- 131D

We love the service from etrailer.com! Fast delivery, great prices. 279605

- 131D

Great product looks awesome on my Jeep !! 150726

- 131D

The lock wasn't as big as I was expecting, but it will work great for my toolbox i'm putting on top of my roof rack. Good lock though! 49547

- 131D

Lock as expected. 12024

- 131D

Product was not as sturdy as I'd hoped. Service from etrailer.com was great! 10172


Ask the Experts about this Master Lock Padlocks

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    I have a solution for locking the arms on your Swagman XC # S64650 but the Replacement Locking Long and Short Hooks for Swagman # SP428 does not fit on the center mast of your bike rack. It will be too large and won't engage with your mast. These arms are a replacement for the Swagman Chinook # S64683, G10 S64682, or E-Spec Bike # S94FR racks. The Master Lock Covered, Solid Body Padlock # 131D is a good way to lock your bike rack. This will secure at the hole near the release button...
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  • Best Cargo Bag for 24 x 40 etrailer Cargo Carrier for RV Bumper
    I can definitely help you out with a cargo bag to use with the nifty 24 x 40 etrailer Cargo Carrier for RV Bumper # e99050. The best option for this is going to be the etrailer Cargo Bag with Mounting Straps # e98990. There are a number of reasons why I really like this bag, starting with its size. It is 40 inches wide and 20 inches deep so it is going to be a perfectly snug fit with the 40 inch wide x 24 inch deep cargo carrier. Other bags that are wider won't allow you to fully...
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  • Is It Safe to Use Older Husky 5th Wheel Hitch
    As long as a 5th wheel hitch has been well taken care of and is in good working order there is no reason to doubt that it is safe to use. Unless you were to exceed the weight capacity I see no reason to be concerned. Husky is known for making quality 5th wheel hitches so unless something doesn't look right I'd say you are good to go! If you would like to add a lock you can use the Master Lock Covered, Solid Body Padlock # 131D which has a 3/16 inch diameter shackle.
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  • How To Lock The Valterra RV Sewer Hose Carriers
    It is a great idea to use the RV Sewer Hose Carrier for fishing poles. You can lock the Valterra RV Sewer Hose Carrier part # A04-5094BK with a padlock using the hole in the lid on the ends of the carrier. The hole measures a little less than 1/4". I recommend to use Master Lock Covered, Solid Body Padlock part # 131D to lock it. I took a look at your photo and we do not carry a gray water hose storage box that looks like yours. We do carry the Lippert Components Nozzle Enclosure with...
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  • Bike Rack Needed for Kayak Clearance When Using the Stromberg Carlson Bike Bunk
    I do have a few alternative bike racks that you can potentially use with the Stromberg Carlson Bike Bunk # CC-275. Just for reference, the Thule T2 Pro XTS # TH9034XTS that you currently use measures 41-1/2" from the center of the hitch pin hole to the farthest edge of the bike rack. If you want to stick with the Thule brand then the Thule T2 Classic # TH9044 only measures 36" from the hitch pin hole to the end of the bike rack. This is the base model version of the T2 Pro that you...
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  • Can the Swagman Platform-Style Bike Rack 64663 be Installed on a Trailer Hitch
    Yes, you can use the Swagman Platform-Style 2 Bike Rack # S64663 with a 2" receiver, like the Curt # E-100 that you referenced, or with the bumper mount that comes with the bike rack. To ensure that this fits your application you can measure 6-3/4" from the front end of your bumper as that is about where the rearmost cradle will sit of the Swagman bike rack. If you would like to add locks to this bike rack then part # S64027 will lock the bike rack while 2 of the padlocks # 131D...
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  • The Best Options For Hauling Cargo Safely On My Roof Or In My Hitch To Free Up Space?
    Let's see what we can do. I understand your concern about theft, but in all reality all it takes is a sharp knife to cut into any soft bag and take whatever you have in there. If you're wanting to use it for more than just rooftop carrying, a cargo box isn't what you want either even though it will be more secure. That being said, I'll give you two different options, a roof option and a hitch option. Both are going to be using either our 20 cu ft bag # 988501 or our 9 cu ft bag # e98990....
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  • Can 20x47 MaxxTow Cargo Carrier and Bag be Used on a 2018 Jeep Wrangler with 2 Trailer Hitch
    The MaxxTow Cargo Bag w/ Mounting Straps # MT70209 and the 20x47 MaxxTow Cargo Carrier for 2" Hitches # MT70108 are actually excellent choices and will fit together beautifully. They do technically take up the same amount of space but since the bag isn't rigid it allows you to take full advantage of the space the carrier offers. The only other thing I recommend adding are some security measures to help protect your cargo. For this I recommend the Anti-Rattle Trailer Hitch Receiver Lock...
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  • Swagman XTC2 Versus XC2 Bike Rack Comparison
    If I had to choose between the two, I would choose the XTC-2, part # S64670. Not only does the XTC2 have rubber straps to better secure the wheels, but the wheel hoops themselves are much stronger and are slightly raised for better ground clearance. The rack includes a threaded hitch pin, but I would also recommend the locking hitch pin, part # S64029. With the addition of two padlocks like part # 131D, your bikes would be secured to the rack.
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  • Can I use a Padlock on the Swagman XTC-2 to Secure my Bikes
    The use of a small pad lock like the Master Lock Covered Solid Body Padlock part # 131D on the Swagman XTC-2 2-Bike Platform Rack part # S64670 would not cause any harm to the bike rack. It can be an effective way to secure your bikes.
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  • Fit Looks Tight for Reese Pull Pin Lock Plates for 5th Wheel Trailer Hitches # RP58093
    Thank you for the photo of your 5th wheel base rail and mounting pin and clip. The Reese Pull Pin Lock Plates # RP58093 you referenced are intended to be used with a pad lock to secure your hitch mounting pin. In order to use these on your 5th wheel you will need to replace your mounting pins (or at least one of them anyway) with a new pin that has a notch in the end. We offer part # 6020PIN. Given the tight fit around your base rails installing these may be easier with a helper on...
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  • Recommended Padlock Compatible with Demco 5th Wheel Rail Adapter for Ford Towing Prep Package
    The Master Lock Laminated Steel Padlock - 1-3/4" Wide - 5/16" Diameter Shackle # ML1KA can be keyed alike and will work very well to secure your Demco 5th Wheel Rail Adapter for Ford OEM 5th Wheel Towing Prep Package # DM6175.
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  • Does the Curt Bike Rack C18065 have an Anti-Rattle Hitch Bolt
    The Curt Bike Rack part # C18065 does include a threaded hitch pin bolt that will tighten the shank of the rack to the hitch that the rack is installed in. For a lock that you could run through the end of the bolt after it is installed you could use the # 131D.
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  • How to Lock Bikes for Security When Using the Swagman Pick-Up 2 Bike Carrier # S64702
    The Swagman Pick-Up Truck-Bed-Mounted 2 Bike Carrier # S64702 comes with an integrated lock for the rack itself. If you would like to lock your bikes as well you will need to add a cable lock like part # e98891. You can also add some extra security to the adjustment lever by installing a padlock like part # 131D. If you would rather have a truck bed bike rack that has integrated locks for both the rack and your bikes then the Swagman Patrol # S64701 is what you are looking for. This...
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    The only way I can see fit to secure the Curt A25 5th Wheel Trailer Hitch part # C16066 to your 2019 GMC Sierra 3500 would be by replacing the security pins with padlocks as you mentioned. The correct size padlock for you is the Master Lock Padlock part # 131D. The nuts that hold the legs to the feet could be removed with an open ended wrench (crescent is likely too bulky) but they would also need a pair of pliers to remove the cotter pin and they would have to do this for all four sides....
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    Great question. The Swagman Traveler XCS - Platform-Style 2 Bike Rack for 2" Ball Mount - Towing # S64664 will not be compatible with the Replacement Long and Short Hooks for Swagman G10 or Chinook Platform Bike Racks - Locking # SP428. The shank is a different size and the ratcheting portion are in completely different locations. You can use the Master Lock Covered, Solid Body Padlock - 3/16" Diameter Shackle # 131D to lock your bikes to your Traveler XCS rack.
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    Thank you for providing a photo of your SportRack Aero XL cargo box for which you are looking for a complete replacement lock assembly. I shared the photo with my contact at Thule (parent company of SportRack) and unfortunately they do not have a replacement lock. The original mechanism was, according to my contact, riveted in place and there is no user-replaceable part. However, you can still add a lock to the box with a little bit of creative modification. You will need to drill new...
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  • How to Prevent Yourself from Getting Locked in a Trailer that has a Cam-Door Lock
    You would just need to lock the latch shut after you opened the trailer. That way the only way someone could close the door and lock it would be to first unlock the latch. Most likely you were planning on using a padlock to lock the door closed like the part # 131D, so when the door is open you would just need to put the padlock back on the latch and you would prevent the latch from getting shut while you are in the trailer.
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  • Will Master Lock Covered Solid Body Padlocks # 141T Work with the Swagman XTC-2 Bike Rack # S64670
    I went out to our video studio to take a look at the XTC-2 and found that the padlock hole that can be used to secure the frame hooks of the Swagman XTC-2 Bike Rack, # S64670, into position measures right at 1/4 inches. With this measurement, I recommend going with the Master Lock Covered Solid Body Padlock with 3/16 Inch Diameter Shackle, # 131D. This lock is sold individually. The Master Lock Covered Solid Body Padlock with 1/4 Inch Diameter Shackle, # 141T, will be too large for the...
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    Yes the Fishing Rod Storage Tube for Malone MegaSport Kayak Trailer Item # MPG541 is compatible with the 2nd Tier Micro Sport. I have included this Item # MAL62FR as a reference that shows the rod holder mounted. I also recommend the Master Lock Covered, Solid Body Padlock - 3/16" Diameter Shackle Item # 131D to lock the hinged door on the case.
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    I'm guessing you already have a trailer hitch installed on your 2015 Fiat 500? If not I've attached a link to our selection of trailer hitches that you can filter through. When it comes to bike racks and vehicles that are flat-towed a lot of manufacturers like to shy away from that. I don't 100% understand that because the vehicle won't move that much more, but this does limit our options a little more. For a bike rack that won't require an adapter for the women's bike we have the Lets...
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    Regarding your SportRack Vista XL # SR7018 roof top cargo box. On further correspondence we discussed that not only do you need a key and lock cylinder core, but you also need the housing and latch parts. I spoke with the manufacturer and they only have replacement parts for keys and lock cores, but NOT the remaining mechanism. The remaining solution would be a hasp lock using the Paneloc # H125-203E hasp with the Paneloc # H110-204U Staple, and a Master Lock # 131D padlock.
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  • Can Padlocks be Used to Lock Bikes to Swagman XTC Bike Rack
    I went out to our video studio to take a look at the XTC-2 and found that the padlock hole that can be used to secure the frame hooks of the Swagman XTC-2 Bike Rack, # S64670, into position measures right at 1/4 inches. With this measurement, I recommend going with the Master Lock Covered Solid Body Padlock with 3/16 Inch Diameter Shackle, # 131D. This lock is sold individually.
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    The drawbar would only be used if you were towing a trailer and the 2017 Chevy Bolt EV is not rated for towing so you would not need the drawbar. I checked your order notes and it looks like you ordered the BikeWing # LGA54FR. This rack has a threaded hitch pin which provides anti-rattle abilities. To lock it you can use padlock # 131D through the hole at the end of the threaded hitch pin.
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    If you have a lock with a replaceable lock core on your Sears cargo box, then you can use a lock core like part # THLOCKN070. This would replace the lock core on your roof box. You would then need to order the replacement key to match. That is part # THKEYN070. The lock you asked about, part # SR03807 is not a replacement lock for your carrier. If the lock is riveted in place on the roof box, the lock cannot be replaced. You would need to remove the lock and use a hasp lock like...
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Info for this part was:

Written by:
Tyler C
Updated by:
Adele M
Video by:
Dustin K
Installed by:
Shane T
Video Edited:
Chad S

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