IMPORTANT NOTE:

If using this style lock on a trailers' coupler latch (see image below), please note it is NOT recommended for all 2-5/16" couplers. It will fit some 2-5/16" couplers, the exception being 2-5/16" couplers that have the latch partially recessed from the top surface of the coupler, or latches that are wider than 7/8".
The #37 latch lock works well on 1-7/8" and 2" couplers and on virtually all standard hasp applications. 

Master Coupler Latch/Hasp Lock

Three Keyed Alike - Model # 37KA-2

Lifetime Guarantee

The $31.80 special price with FREE shipping is for two locks keyed alike (same key unlocks both), and four keys. 

These armored padlocks work well when securing trailer hasps or chains. The armored shackle prevents bolt cutter attacks. KEY RETAINING - ensures that padlock is not left unlocked. 

When used as a coupler latch lock they protect and guard against tow-away theft. The lock works when the trailer is either connected to the tow vehicle or when the trailer is unattached and prevents the coupler latch from moving, therefore preventing either the coupler to be removed from the ball, or not allowing a ball to be placed into the coupler.

To fit coupler latch: remove the shackle sleeve. Shackle fits opening of 9/32" (7mm). Note that non-rigid shackle has enough play to fit virtually all coupler latches less than 7/8" wide.

You can order multiple locks keyed alike. This style lock is also available in a 3-pack, 4-pack, 6-pack and 8-pack. To purchase, visit our  3-pack store category,  4-pack store category, or  6-pack store category or  8-pack store category. To reach any desired quantity order a combination of 3-packs, 4-packs, 6-packs, 8-packs or single keyed alike lock necessary to attain the desired quantity.  

For quantities greater than eight please inquire and we can have them in a couple of days.

This lock is also available with BumpStop™ technology.


LATCH LOCK FEATURES:

  • 1-1/2" (38mm) wide x 7/8" (21mm) opening Armored Shackle Guard helps block bolt cutters.
  • Keyed Alike
  • KEY RETAINING - ensures that padlock is not left unlocked.
  • Revolving, case-hardened steel shackle sleeve resists cutting and sawing.
  • Removable shackle sleeve. Sleeve off - Secures coupler latches. Sleeve on - Works best with hasps.
  • Precision pin tumbler mechanism resists picking.
  • Limited Lifetime Warranty.

THE MASTER ADVANTAGE

  • World's Largest Padlock manufacturer, approximately 50,000,000 locks sold each year.
  • Ranked #1 by consumers as the best padlock brand.
  • All Master Lock padlocks are individually tested for quality.
  • 97 out of 100 people recognize the Master Lock Brand name.
  • Market share leader in U.S. sales of padlocks.
  • Master Lock padlocks offer a full lifetime guarantee.

Please contact us at 856-374-4740 with any questions or comments.

Telephone customer service hours: Mon-Thurs 7am-9pm EST Fri-Sat 7am-5pm