New Arrivals/Restock

Master Lock Key Lock - Red, 387NKA, 1-Pack

flash sale iconLimited Time Sale
Until the end
03
19
26

US$74.25 cheaper than the new price!!

Free shipping for purchases over $99 ( Details )
Free cash-on-delivery fees for purchases over $99
Please note that the sales price and tax displayed may differ between online and in-store. Also, the product may be out of stock in-store.
Used  US$49.50
quantity

Product details

Management number 232122281 Release Date 2026/06/18 List Price US$49.50 Model Number 232122281
Category

This durable high security keyed alike king pin lock protects your trailers and their cargo. This lock includes two keys. The reality is that trailer theft is quite prevalent throughout the United States and around the world. There are very few secured parking areas available to truck operators, and dropped trailers with no locking device are vulnerable to cargo thieves. Many king pin locks are ineffective in preventing a full trailer/container theft. For an effective theft deterrent look to Master Lock, the most recognizable and trusted locking company in the industry today. This individual keyed alike lock is purchased in conjunction with a two pack listing, when requiring an odd numbered quantity. Fleet orders are available. When purchasing even quantities buy as many two packs as needed - available in our Amazon Store (click on our logo), or via the Master Lock link under this pages title. If requiring an odd quantity, purchase as many two packs as necessary plus this single keyed alike lock. LOCK BUMPING, a surprisingly simple method of breaking in through locked doors and padlocks - is undoubtedly the newest emerging threat to personal property security. And virtually all locks in use today are particularly vulnerable to bumping. Until now. BumpStopTM Advanced Cylinder Technology employs an innovative, patent pending design which utilizes a unique reverse rake tapered driver pin, high performance springs and tightly machined cylinder chambers. During a bump attempt, this design prevents the transfer of force from the bump key to the pins and therefore blocks rotation of the cylinder so that the lock remains locked.

  • Secures the king pin of semi-trailers, RV's, and other fifth wheel trailers. Solid, cast aluminum alloy withstands physical attacks.
  • Featuring the BumpStop technology. For explanation view SEE MORE PRODUCT DETAILS below.
  • Available Keyed Alike for your entire fleet. ATTENTION: If you order two 1-packs they will NOT necessarily be keyed the same. To ensure you get two 1-packs keyed alike, you must order the 2-pack.
  • Lock, protected by the housing, resists common physical attacks: 1) Shackle cannot be cut. 2) Hardened steel bottom plate resists drill attacks. 3) Rivets are countersunk making chisel attempts fruitless
  • The bright red finish and red flag makes it visible to the driver from a distance. Handle makes it easy to carry.
UPC 071649217166
ASIN B001OEIC1K
Color Red
Shape Round
Lock Type Key Lock
Brand Name Master Lock
Model Name 387KA
Style Name Modern
Unit Count 1.0 Count
Finish Types Painted
Manufacturer Master Lock
Model Number 387NKA
Material Type Aluminum
Control Method App
Controller Type Hand Control
Number of Pieces 1
Additional Features Key Lock
Included Components 2 keys
Manufacturer Part Number 387NKA
Smart Home Compatibility Not Smart Home Compatible
Recommended Uses For Product Securing the king pin of semi-trailers, RVs, and fifth wheel trailers
Manufacturer Warranty Description MASTER LOCK PRODUCT WARRANTY: Limited Lifetime Warranty. Master Lock Company LLC (Master Lock) grants the following warranty: If this product or any part of the product fails due to a defect in materials or workmanship at any time during the life of the product, Master Lock will, at its own discretion, repair or replace the product or part free of charge. Simply contact Master Lock at www.masterlock.com or 1.800.464.2088 for instructions on obtaining repair or replacement.

Correction of product information

If you notice any omissions or errors in the product information on this page, please use the correction request form below.

Correction Request Form

Product Review

You must be logged in to post a review