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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 (9)
  • Q & A (37)
  • Videos (1)
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  • Why etrailer?

Master Lock Padlocks - 131D

  • Universal Application Padlock
  • Master Lock
  • 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:  4.0 out of 5 stars   (9 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

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

- 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

- 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

  • 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.
    view full answer...
  • 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...
    view full answer...
  • 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...
    view full answer...
  • 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...
    view full answer...
  • 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.
    view full answer...
  • 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.
    view full answer...
  • What Size Padlock Can be Used with the Curt Cargo Bag # C18210
    If you check out the attached review video of the Curt Cargo Bag # C18210 (about the 2:00 mark) our video team member already measured the zippers to have a hole that is about 3/8" diameter so you will just need a padlock with a shackle diameter smaller than 3/8" to use with the bag. The Master Lock Laminated Steel Padlock # ML101 has a shackle diameter of 5/16" so it should work just great for your application. If you would like a smaller diameter shackle then I recommend the Master...
    view full answer...
  • 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...
    view full answer...
  • 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...
    view full answer...
  • Recommended Options To Securely Lock Cargo To 24x60 Curt Cargo Carrier for 2 Hitches
    For an option to use with your Curt Cargo Carrier, # C18153, I recommend using an enclosed box like the DeeZee Specialty Series Storage Box - Chest Style - Poly Plastic - 3.6 Cu Ft - Black, # DZ6535P. This box is 35" long x 14" wide x 13" tall, and will require locks like the Master Lock Shrouded Padlock, # 37DAT, along with a cable lock or permanent mounting solution. Another option is the etrailer Cargo Bag w/ Mounting Straps - Weatherproof - 20 cu ft - 59" x 24" x 24", # 988501,...
    view full answer...
  • 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.
    view full answer...
  • Replacement Lock Assembly for SportRack Aero XL Rooftop Cargo Box
    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...
    view full answer...
  • Can't Remove Broken Key fro Thule Cargo Box. What Now?
    Thule unfortunately doesn't offer the cylinder or sleeve the lock core sits in as a replacement part. If the cylinder hasn't been damaged, there's a chance a locksmith could carefully drill the lock core out, because if that cylinder is damaged, there's not much that can be done other than using a couple of padlocks, hasps # H135-203E and # H115-204E staples to secure the box. It isn't a pretty solution, but it's less expensive than a new Thule cargo box.
    view full answer...
  • 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.
    view full answer...
  • Recommended Hasp And Lock For Enclosed Trailer That Deters Theft
    The closest we have to the dimensions you mentioned is part # PLR158-102-A which measures 4-inches hole to hole. If that will not work for you and you have to drill a new hole for the hasp I recommend part # PLR158-102-SS. This measures 3-3/4 inches center to center for the mounting holes. I do have an alternative for you. I recommend a lock like part # 720DPF. The mounting hardware is hidden under the covers and it is difficult to pry off. It is made of hardened steel and uses a padlock...
    view full answer...
  • Hitch Lock Recommendation for a BikeWing Bike Rack on a 2017 Chevy Bolt EV
    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.
    view full answer...
  • 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...
    view full answer...
  • Secure Cargo Carrier Recommendation to Fit Roadmaster Spare Tire Carrier # RM-195125
    The 2 inch hitch opening of the Roadmaster Spare Tire Carrier # RM-195125 that you have was designed to allow you to carry an additional cargo carrier with it as needed. For security like you mentioned being a priority I would go with an enclosed carrier like GearDeck 17 Enclosed Cargo Carrier # H00604 as it can be locked with a padlock # 131D to keep the enclosure shut and then can be locked to the trailer hitch with a part # ACC3250 as well. Having the contents of the box totally out...
    view full answer...
  • Replacement Lock Core And Keys For Sears Cargo Box
    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...
    view full answer...
  • Lock Recommendations for a Reese Titan Fifth Wheel Hitch
    I was able to find your order notes so I was able to determine that you bought the Reese 16 Slider fifth wheel hitch part # RP30075. For a lock to secure the hitch to the rails of your truck you would want the part # TR63254. I attached a review video for more info. For a small padlock to lock the handle of the hitch you would want the part # 131D.
    view full answer...
  • Recommended Cargo Carrier and Lighting for 2014 Acura MDX
    Everything looks perfect! Starting with the wiring harness, the Tekonsha T-One Vehicle Wiring Harness # 118628 that you referenced is confirmed to fit your 2014 Acura MDX and is exactly the harness that I would recommend. This custom-fit harness will install by connecting directly to the built-in port behind the driver side trim panel. This will give you a 4-Way at the rear of your MDX to connect with and power a trailer's signal lights. I have attached an installation video on your...
    view full answer...
  • How to Lock the Curt A25 OEM 5th Wheel Trailer Hitch 16066
    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....
    view full answer...
  • Can the Thule Pack 'n Pedal Round Trip Transition # TH100502 be Locked
    Yes, you can lock the Thule Pack 'n Pedal Round Trip Transition # TH100502 closed. We recommend a small luggage padlock such as # 131D. Our demonstrator points this out at the end of the video I have linked for you.
    view full answer...
  • Recommendation For Replacement Lock For SportRack AERO XL Roof Cargo Box
    I did some research and Unfortunately there is no replacement lock available for you SportRack Aero XL cargo box. If you are interested in fashioning a replacement option then you could use a silicone caulk like Item # LT37467 to seal up your lock holes and then drill new holes for a new lock. You could install a simple single-hinged Master lock like Item # 720DPF and then use a padlock like Item # 131D to keep it secure. I have attached a video for you to check out. Contact...
    view full answer...
  • 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.
    view full answer...
  • Is this Step Lockable to Prevent Theft from Hitch
    A lockable hitch pin is included with the HitchMate Extendable TruckStep # HE4045 so you can be free of worry that someone will try to steal it from your hitch receiver. Just add a padlock with a 3/16-inch diameter shackle, such as # 131D.
    view full answer...
  • Will the Swagman Pick-Up Truck Bed Mounted Bike Rack Fit on a 2007 Ford Ranger w/o Stepside Bed
    The Swagman Pick-Up Truck Bed Mounted 2 Bike Carrier # S64702 will fit your 2007 Ford Ranger without the Stepside Bed. This bike carrier will snap right into your bed and will adjust to fit the width of your bed. While the Integrated push-button lock secures the rack to your truck bed, you can add a padlock similar to part # 131D on the telescoping arm lever for added security. I attached a review video of the truck bed rack you may want to check out.
    view full answer...
  • Lock Recommendation For Truck Tool Box
    The toolbox locks we offer are designed for specific toolboxes, but I may have a lock you can use. You may be able to use a lock like the UWS Twist Latch, part # UWSTWISTLOCK. This would involve attaching both parts of the latch to your toolbox. You would also need a padlock like part # 131D to use in the latch. If you have the make and model of your toolbox let me know and I can see if we have a lock that will work better for you.
    view full answer...
  • 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...
    view full answer...

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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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