Shop master lock for trailer

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$30.00
Metal Trailer Lock - Keyed Alike, Yellow - ULINE
Uline
$30.00
Metal Trailer Lock - Keyed Alike, Yellow - ULINE
Uline
$66.95
Master Lock Trailer Coupler Lock, 2-5/16" - 378DAT
Global Industrial
$66.95
Master Lock Trailer Coupler Lock, 2-5/16" - 378DAT
Global Industrial
$30.00
Metal Trailer Lock - Keyed Alike, Blue - ULINE
Uline
$30.00
Metal Trailer Lock - Keyed Alike, Blue - ULINE
Uline
$40.65
Master Lock Black Universal Size Trailer Hitch Lock, Trailer Coupler Lock For Securing Rvs, Horse Trailers, Tool Trailers And More, 379ATPY
Amazon.com
Free shipping
$40.65
Master Lock Black Universal Size Trailer Hitch Lock, Trailer Coupler Lock For Securing Rvs, Horse Trailers, Tool Trailers And More, 379ATPY
Amazon.com
$17.40
Master Lock 1471DAT Trailer Coupler Latch Lock, 3-4/10" Long Shackle X 9/32" Diameter Pin
Amazon.com
$17.40
Master Lock 1471DAT Trailer Coupler Latch Lock, 3-4/10" Long Shackle X 9/32" Diameter Pin
Amazon.com
$63.19
Master Lock 378DAT Trailer Coupler Lock, 2-5/16-Inch
Amazon.com
Free shipping
$63.19
Master Lock 378DAT Trailer Coupler Lock, 2-5/16-Inch
Amazon.com
$36.99
$41.99
Master Lock Universal Trailer Coupler Lock
Tractor Supply Co.
11% off
$36.99
$41.99
Master Lock Universal Trailer Coupler Lock
Tractor Supply Co.
$43.77
Master Lock Coupler Lock: Universal, Powder Coated, (2) Keys, Coupler Lock Model: 389DAT
Grainger
$43.77
Master Lock Coupler Lock: Universal, Powder Coated, (2) Keys, Coupler Lock Model: 389DAT
Grainger
$25.72
Master Lock Trailer Receiver Lock: Barbell, Silver, (2) Keys, Receiver Lock Model: 1479DAT
Grainger
$25.72
Master Lock Trailer Receiver Lock: Barbell, Silver, (2) Keys, Receiver Lock Model: 1479DAT
Grainger
$29.84
Master Lock Receiver/Coupler Lock: Silver, (2) Keys, Trailer Locking Kit Model: 2848DAT
Grainger
$29.84
Master Lock Receiver/Coupler Lock: Silver, (2) Keys, Trailer Locking Kit Model: 2848DAT
Grainger
$9.99
Gray No Key Control Masterlock
TPES Online
$9.99
Gray No Key Control Masterlock
TPES Online
$43.75
Master Lock Universal Trailer Coupler Lock
Forestry Suppliers Inc.
$43.75
Master Lock Universal Trailer Coupler Lock
Forestry Suppliers Inc.
$61.65
Master Lock Universal Trailer Coupler Lock Keyed Alike To Key 0501 | 379KAATPY-0501
Lowe's
$61.65
Master Lock Universal Trailer Coupler Lock Keyed Alike To Key 0501 | 379KAATPY-0501
Lowe's
$44.99
Master Lock 5/8 in. (16Mm) Class III/IV Barbell Trailer Coupler Lock, Keyed Alike
Tractor Supply Co.
$44.99
Master Lock 5/8 in. (16Mm) Class III/IV Barbell Trailer Coupler Lock, Keyed Alike
Tractor Supply Co.
$63.01
Master Lock 3794DAT Trailer Lock, Trailer Coupler Receiver Lock Combo Pack
huffordr
$63.01
Master Lock 3794DAT Trailer Lock, Trailer Coupler Receiver Lock Combo Pack
huffordr
$146.30
Master Lock - (4) Keyed Alike Universal Trailer Coupler/Tongue Locks W/8 Keys, 379KA-4
Amazon.com
Free shipping
$146.30
Master Lock - (4) Keyed Alike Universal Trailer Coupler/Tongue Locks W/8 Keys, 379KA-4
Amazon.com
$24.76
Master Lock Trailer Coupler Latch Lock - 3-1/2" Span - 9/32" Diameter - Chrome ML94VR
etrailer.com
$24.76
Master Lock Trailer Coupler Latch Lock - 3-1/2" Span - 9/32" Diameter - Chrome ML94VR
etrailer.com
$187.80
Master Lock Universal Trailer Coupler Lock, Fits Most 1-7/8", 2" And 2-5/16" Couplers - 389DAT - Pkg Qty 4
Global Industrial
$187.80
Master Lock Universal Trailer Coupler Lock, Fits Most 1-7/8", 2" And 2-5/16" Couplers - 389DAT - Pkg Qty 4
Global Industrial
$41.99
Master Lock Trailer Coupler Lock - Red By Sportsman's Warehouse
Sportsman's Warehouse
$41.99
Master Lock Trailer Coupler Lock - Red By Sportsman's Warehouse
Sportsman's Warehouse
$26.69
Master Lock Silver And Red Receiver Lock, Stainless Steel Barbell™ Hitch Pin Lock, Fits 5/8 in. Receivers, Weather Resistant Automotive Receiver Lock,
Amazon.com
$26.69
Master Lock Silver And Red Receiver Lock, Stainless Steel Barbell™ Hitch Pin Lock, Fits 5/8 in. Receivers, Weather Resistant Automotive Receiver Lock,
Amazon.com
$46.99
Master Lock 1/2 in. (13Mm) And 5/8 in. (16Mm) Stainless Steel Receiver Locks With Adjustable Coupler Latch Lock
Tractor Supply Co.
$46.99
Master Lock 1/2 in. (13Mm) And 5/8 in. (16Mm) Stainless Steel Receiver Locks With Adjustable Coupler Latch Lock
Tractor Supply Co.
$50.80
Master Lock 379ATPY Trailer Coupler Lock 1St-In-Padlocks, Keyed Alike - All Locks Open With Same Key (Can Only Be Matched To Keys That Start With "0")
1st-in-Padlocks
$50.80
Master Lock 379ATPY Trailer Coupler Lock 1St-In-Padlocks, Keyed Alike - All Locks Open With Same Key (Can Only Be Matched To Keys That Start With "0")
1st-in-Padlocks
$106.00
Master Lock Trailer Lock, Trailer Coupler Lock, Fits 2-5/16 in.
eBay
$106.00
Master Lock Trailer Lock, Trailer Coupler Lock, Fits 2-5/16 in.
eBay
$67.79
Master Lock 378DAT Trailer Coupler Locks 1St-In-Padlocks
1st-in-Padlocks
$67.79
Master Lock 378DAT Trailer Coupler Locks 1St-In-Padlocks
1st-in-Padlocks
$50.74
Master Lock 377DAT Trailer Coupler Locks 1St-In-Padlocks
1st-in-Padlocks
$50.74
Master Lock 377DAT Trailer Coupler Locks 1St-In-Padlocks
1st-in-Padlocks
$23.59
Master Lock Chrome Hasp Lock, Heavy Duty Hidden Shackle Lock And Hasp, Solid Steel Lock For Trucks, Trailers, Or Vans, 9 Inches Wide, 770
Amazon.com
$23.59
Master Lock Chrome Hasp Lock, Heavy Duty Hidden Shackle Lock And Hasp, Solid Steel Lock For Trucks, Trailers, Or Vans, 9 Inches Wide, 770
Amazon.com
$199.70
Master Lock Semi-Trailer Lock For Use With Trailer King Pins 387 - 32948531
Penn Tool Co
$199.70
Master Lock Semi-Trailer Lock For Use With Trailer King Pins 387 - 32948531
Penn Tool Co
$46.55
Master Lock Universal Trailer Coupler Lock 379KAATPY
etrailer.com
$46.55
Master Lock Universal Trailer Coupler Lock 379KAATPY
etrailer.com
$80.62
Master Lock Trailer Coupler Lock - 2-5/16" Size Silver 378DAT
DkHardware.com
$80.62
Master Lock Trailer Coupler Lock - 2-5/16" Size Silver 378DAT
DkHardware.com
$214.96
Master Lock - (6) Keyed Alike Universal Trailer Coupler Locks W/12 Keys, 379KA-6
Amazon.com
Free shipping
$214.96
Master Lock - (6) Keyed Alike Universal Trailer Coupler Locks W/12 Keys, 379KA-6
Amazon.com
$217.35
Master Lock Fits 1-7/8, 2, 2-5/16 Couplers-(6) Keyed Alike Trailer
eBay
$217.35
Master Lock Fits 1-7/8, 2, 2-5/16 Couplers-(6) Keyed Alike Trailer
eBay
$38.81
Master Lock 379DAT Trailer Coupler Locks 1St-In-Padlocks
1st-in-Padlocks
$38.81
Master Lock 379DAT Trailer Coupler Locks 1St-In-Padlocks
1st-in-Padlocks
$45.99
Marshall Master Lock Trailer Coupler Lock | Camping World
Camping World
$45.99
Marshall Master Lock Trailer Coupler Lock | Camping World
Camping World
$105.27
Master Lock 3794DAT | Combination Trailer Lock Kit, Keyed Alike With Trailer Coupler/Receiver/Coupler Latch
AllDataResource.com
$105.27
Master Lock 3794DAT | Combination Trailer Lock Kit, Keyed Alike With Trailer Coupler/Receiver/Coupler Latch
AllDataResource.com
$12.00
Master Lock Solid Brass Latch Lock Trailer Coupler 605Dat 3/4 in 19 mm
eBay
$12.00
Master Lock Solid Brass Latch Lock Trailer Coupler 605Dat 3/4 in 19 mm
eBay
$11.97
Master Lock 2847DAT | Trailer Coupler Latch Lock, Keyed Different, Adjustable, 9/16 To 2-3/4" Length, Stainless Steel
AllDataResource.com
$11.97
Master Lock 2847DAT | Trailer Coupler Latch Lock, Keyed Different, Adjustable, 9/16 To 2-3/4" Length, Stainless Steel
AllDataResource.com
About Master Lock Universal Trailer Coupler Lock
0:57
About Master Lock Universal Trailer Coupler Lock
47.1K viewsMar 10, 2010
YouTubeMaster Lock
Master Lock Universal Coupler Lock: Secure Your Trailer
0:28
Master Lock Universal Coupler Lock: Secure Your Trailer
2.1K viewsFeb 19, 2025
YouTubeCommQuest
Add a Master Lock 2 5/16” coupler lock and protect your trailer for less than 1% of your investment.
0:17
Add a Master Lock 2 5/16” coupler lock and protect your trailer for less than 1% of your investment.
2.1K views5 months ago
YouTubeSales, Parts & Service. Your Trailer Experts.
[377] Master Lock Model 2866 Trailer Hitch Pin Lock Picked
2:46
[377] Master Lock Model 2866 Trailer Hitch Pin Lock Picked
49.1K viewsFeb 4, 2017
YouTubeLockPickingLawyer
Protect Your Trailer from Theft! Master Lock #389DAT Tested!
1:42
Protect Your Trailer from Theft! Master Lock #389DAT Tested!
336 viewsDec 22, 2024
YouTubeCommQuest
Master Lock Coupler Lock
2:00
Master Lock Coupler Lock
754 views11 months ago
YouTube44 Years Around the Sun
Heavy Duty Trailer Security With Master Lock 378DAT Coupler Lock
2:28
Heavy Duty Trailer Security With Master Lock 378DAT Coupler Lock
4 views4 months ago
YouTubeDVM NEWS
0:25
Master Lock Silver Trailer Hitch Lock, Trailer Tongue Lock for RV, Horse Trailer, or Utility Tool Trailer, 377DAT
Jan 1, 2024
amazon
1:12
Universal Trailer Lock – How It Works & Should You Buy?
4 views1 month ago
YouTubeTeam Kandy
2:22
etrailer | A Closer Look at the Master Lock Trailer Coupler Lock
189 views7 months ago
YouTubeetrailer
1:37
Video 18 - Newbie vs. Master Lock 389DAT Trailer Coupler Lock - No tension lever needed :)
10.8K viewsFeb 15, 2022
YouTubeLock Picking Newbie
1:20
Common MasterLock trailer lock EASILY defeated
12.4K viewsJan 9, 2019
YouTubeFt. Knox Locks
0:21
Part 4 | What is the best Trailer Lock? Master Lock
9.4K viewsApr 18, 2025
YouTubeLVT
0:45
Master Lock Trailer Hitch Lock, Fits 1-7/8 in., 2 in., and Most 2-5/16 in. Trailer Couplers, Weather Resistant Automotive Hitch Lock with Keys, 377KA
36 viewsOct 3, 2008
amazon
3:16
[410] Master Lock 605DAT Trailer Coupler Lock Picked and Bypassed
28.4K viewsMar 10, 2017
YouTubeLockPickingLawyer
3:48
etrailer | Comprehensive Review: Master Lock Hitch Receiver and Coupler Latch Lock Set
1.2K viewsJan 4, 2021
YouTubeetrailer
2:10
etrailer | Review of Master Lock Trailer Coupler Lock - Latch Lock - ML94VR
36 viewsMay 4, 2025
YouTubeetrailer
Can MASTER Trailer Hitch Lock Be Easily Picked? (Let's Find Out!)
4:47
Find in video from 01:00Examining the Lock
Can MASTER Trailer Hitch Lock Be Easily Picked? (Let's Find Out!)
21K viewsJun 2, 2020
YouTubeelectronicsNmore
0:30
Master Lock Chrome Hasp Lock, Heavy Duty Hidden Shackle Lock and Hasp, Solid Steel Lock for Trucks, Trailers, or Vans, 9 Inches Wide, 770
Jun 30, 2018
amazon
2:26
[665] Master Lock Trailer Coupler Lock Picked FAST (Model 379ATPY)
49.4K viewsApr 21, 2018
YouTubeLockPickingLawyer
2:28
etrailer | A Closer Look at the Master Lock Set
24 views3 months ago
YouTubeetrailer
7:26
(1532) Master Lock Trailer Couplers (379ATPY & 389DAT) (JUNK!)
107.4K viewsJul 17, 2019
YouTubeBill Johnson
4:41
etrailer | Review of Master Lock Trailer Tongue Lock - Lock Set - ML44VR
46 viewsMay 8, 2025
YouTubeetrailer
Top 5 Best Trailer Hitch Locks 2023
6:44
Find in video from 05:21Master Lock Universal Trailer Couple Lock
Top 5 Best Trailer Hitch Locks 2023
45.5K viewsApr 28, 2022
YouTubeTools Guider
1:26
Master Lock 379ATPY Universal Trailer Hitch Lock , Black
4 views6 months ago
YouTubeวัชรพงศ์ ทองเหว่า
4:53
Top 5 Best Trailer Locks Review in 2023
1K viewsApr 26, 2021
YouTubeLegend Handyman
3:13
Unboxing & Overview: Master Lock Universal Trailer Coupler Lock
5.4K viewsDec 10, 2015
YouTubeMatt Kaczynski
5:33
Best Trailer Hitch Lock of 2025 - Top 5 Picks & Reviewed
402 viewsFeb 1, 2025
YouTubeProduct ReviewZone
2:26
Quality product - Master Lock Trailer Lock, Trailer Coupler & Receiver Lock Combo Pack, 3794DAT , R
4 views5 months ago
YouTubeRT Shop
See more

Shop master lock for trailer

Sponsored
About our ads
$30.00
Metal Trailer Lock - Keyed Alike, Yellow - ULINE
Uline
$30.00
Metal Trailer Lock - Keyed Alike, Yellow - ULINE
Uline
$66.95
Master Lock Trailer Coupler Lock, 2-5/16" - 378DAT
Global Industrial
$66.95
Master Lock Trailer Coupler Lock, 2-5/16" - 378DAT
Global Industrial
$30.00
Metal Trailer Lock - Keyed Alike, Blue - ULINE
Uline
$30.00
Metal Trailer Lock - Keyed Alike, Blue - ULINE
Uline
$40.65
Master Lock Black Universal Size Trailer Hitch Lock, Trailer Coupler Lock For Securing Rvs, Horse Trailers, Tool Trailers And More, 379ATPY
Amazon.com
Free shipping
$40.65
Master Lock Black Universal Size Trailer Hitch Lock, Trailer Coupler Lock For Securing Rvs, Horse Trailers, Tool Trailers And More, 379ATPY
Amazon.com
$17.40
Master Lock 1471DAT Trailer Coupler Latch Lock, 3-4/10" Long Shackle X 9/32" Diameter Pin
Amazon.com
$17.40
Master Lock 1471DAT Trailer Coupler Latch Lock, 3-4/10" Long Shackle X 9/32" Diameter Pin
Amazon.com
$63.19
Master Lock 378DAT Trailer Coupler Lock, 2-5/16-Inch
Amazon.com
Free shipping
$63.19
Master Lock 378DAT Trailer Coupler Lock, 2-5/16-Inch
Amazon.com
$36.99
$41.99
Master Lock Universal Trailer Coupler Lock
Tractor Supply Co.
11% off
$36.99
$41.99
Master Lock Universal Trailer Coupler Lock
Tractor Supply Co.
$43.77
Master Lock Coupler Lock: Universal, Powder Coated, (2) Keys, Coupler Lock Model: 389DAT
Grainger
$43.77
Master Lock Coupler Lock: Universal, Powder Coated, (2) Keys, Coupler Lock Model: 389DAT
Grainger
$25.72
Master Lock Trailer Receiver Lock: Barbell, Silver, (2) Keys, Receiver Lock Model: 1479DAT
Grainger
$25.72
Master Lock Trailer Receiver Lock: Barbell, Silver, (2) Keys, Receiver Lock Model: 1479DAT
Grainger
$29.84
Master Lock Receiver/Coupler Lock: Silver, (2) Keys, Trailer Locking Kit Model: 2848DAT
Grainger
$29.84
Master Lock Receiver/Coupler Lock: Silver, (2) Keys, Trailer Locking Kit Model: 2848DAT
Grainger
$9.99
Gray No Key Control Masterlock
TPES Online
$9.99
Gray No Key Control Masterlock
TPES Online
$43.75
Master Lock Universal Trailer Coupler Lock
Forestry Suppliers Inc.
$43.75
Master Lock Universal Trailer Coupler Lock
Forestry Suppliers Inc.
$61.65
Master Lock Universal Trailer Coupler Lock Keyed Alike To Key 0501 | 379KAATPY-0501
Lowe's
$61.65
Master Lock Universal Trailer Coupler Lock Keyed Alike To Key 0501 | 379KAATPY-0501
Lowe's
$44.99
Master Lock 5/8 in. (16Mm) Class III/IV Barbell Trailer Coupler Lock, Keyed Alike
Tractor Supply Co.
$44.99
Master Lock 5/8 in. (16Mm) Class III/IV Barbell Trailer Coupler Lock, Keyed Alike
Tractor Supply Co.
$63.01
Master Lock 3794DAT Trailer Lock, Trailer Coupler Receiver Lock Combo Pack
huffordr
$63.01
Master Lock 3794DAT Trailer Lock, Trailer Coupler Receiver Lock Combo Pack
huffordr
$146.30
Master Lock - (4) Keyed Alike Universal Trailer Coupler/Tongue Locks W/8 Keys, 379KA-4
Amazon.com
Free shipping
$146.30
Master Lock - (4) Keyed Alike Universal Trailer Coupler/Tongue Locks W/8 Keys, 379KA-4
Amazon.com
$24.76
Master Lock Trailer Coupler Latch Lock - 3-1/2" Span - 9/32" Diameter - Chrome ML94VR
etrailer.com
$24.76
Master Lock Trailer Coupler Latch Lock - 3-1/2" Span - 9/32" Diameter - Chrome ML94VR
etrailer.com
$187.80
Master Lock Universal Trailer Coupler Lock, Fits Most 1-7/8", 2" And 2-5/16" Couplers - 389DAT - Pkg Qty 4
Global Industrial
$187.80
Master Lock Universal Trailer Coupler Lock, Fits Most 1-7/8", 2" And 2-5/16" Couplers - 389DAT - Pkg Qty 4
Global Industrial