First Watch Security

Model # 1840-SN

Internet # 202799699

Satin Nickel Flip Door Lock

$2.38 /each

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Product Overview

First Watch Security has been designing, manufacturing, and deliverying home security products since 1959. Today, First Watch Security is one of the most recognized brands in the market. Our Brand is found on products that include home, office, and door security offerings. Today's consumers understand the importance of supplementing primary entrance door locks. First Watch Security's total offering of products will maximize your sales of auxiliary door security products.

  • Painted or plated steel privacy lock
  • Locks or unlocks with flip action
  • No mortising required
  • Easy to install
  • Satin nickel finish



Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 


Door Locks & Knobs Product Type 
Folding Door Locks 
Satin Nickel 
Hardware Finish Family 
Hardware Included 
Housing collar material 
Lever style 
Lock Type 
Product Weight (lb.) 
0.10625 lb 
Security/ANSI Grade 

Warranty / Certifications

Certifications and Listings 
No Certifications or Listings 
Manufacturer Warranty 
30 Days 

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Customer Questions & Answers

2 Questions0 Answers

Customer Questions & Answers

Satin Nickel Flip Door Lock
Satin Nickel Flip Door Lock

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Can it lock on its own it the door is slammed close? Is there any safety mechanism to keep it in the open position?

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Fairfax, VA
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February 9, 2016
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It doesn't seem to work. My door opens to the right

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November 12, 2015
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Customer Reviews

Rated 4.5 out of 5 by 23 reviewers.
Rated 5.0 out of 5.0 by good solution for my problem The latch works good, best part is that there are no holes in door, just two little holes in the door jamb, if I deside to take the latch off. May 10, 2016
Rated 5.0 out of 5.0 by Security Solution for a Toddler I was looking for something to install on the front door of my son's apartment that wouldn't cause a lot of damage, worked on a metal entry door, and prevented his overly intelligent 2 year old daughter from walking out the front door by herself as she's already figured out the locks. This was perfect. It attaches to the wooden frame of the door and latches the door shut. It's easy for adults to open but is placed high enough to be completely out of her reach. Best of all, it's an inexpensive solution that the apartment management allowed. February 14, 2016
Rated 4.0 out of 5.0 by Flip lock alarm Easy to install and good price. We use it as an indicator that the house alarm is set and needs to be turned off. Keeps guests from setting off the alarm. January 26, 2016
Rated 5.0 out of 5.0 by works good Easy to install, works good. Just wish I didn't have to order it online. And the store cared it in stock November 22, 2015
Rated 5.0 out of 5.0 by Best online purchage Easy to order and have good price from online... Good thing I can return easily at any local store September 29, 2015
Rated 2.0 out of 5.0 by Not what I wanted We purchased this flip lock (and another one locally) to use as extra security measures on our front and rear doors, which have glass inserts. The lock was intended to be installed low to the ground and lifted / unlocked using the toe of a shoe. This lock didn't work smoothly on our (right swing) door because of the (non-symmetrical) design of the lock hinge. I think it would work for a left swing door...but not for us. The other lock we purchased (a different brand) did not have this issue. July 2, 2013
Rated 5.0 out of 5.0 by Great latch for keeping toddlers from letting themselves out. Simple design, but effective. I like that it will won't damage the trim and door when removed. Just some putty in two holes on the jamb. June 3, 2014
Rated 3.0 out of 5.0 by Does not secure properly every time and does not fit flush in door frame. Door lock does not secure properly every time you flip it into place, after several attempts then it is secure. Also, back plate where the screws go does not fit flush into the inside door frame. If you put it flush then it will not secure the flip latch. It seems to work better onto a left side mount rather than a right side mount even though it is made to work on either side of the door frame. September 24, 2011
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