Best Defender Security Door Lock Replacement Parts in 2026
Daisy
Last Updated: Jul 19, 2026
Daisy
Last Updated: Jul 19, 2026
* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| UHPPOTE | 9.85 | ✅ | ✅ | ✅ |
✅This lock offers fail-secure operation, so when power is lost, the strike locks the door
✅The No-Cut Electric Door Strike (Fail-Secure) is used to convert a cylindrical lockset into an electronic access-controlled locking system
✅This "no-cut" model is specially designed to fit most metal or wooden doors with only minimal cutting required of the door frame beyond the hole for the strike
✅Provides 1,000-pound holding force/static strength
✅It's a solenoid with one function, can be wired any way. Uses 2-contacts, non-polarized connection to access control or egress device. (This lock will polarized when the diode added.)
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| UHPPOTE | 9.85 | ✅ | ✅ | ✅ |
Z & L bracket special stent for 600-lb series electromagnetic locks (Indoor)
Special aluminum, firm and durable
Special design, suitable with wooden door and metal door
It is easy to install and convenient to use (Only compatible with the Electromagnetic Lock of UHPPOTE)
Includes one "Z" bracket and one "L" bracket for mounting on inswing doors. The "Z" bracket consists of two parts and is adjustable for flexible positioning of the armature plate.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| UHPPOTE | 9.85 | ✅ | ✅ | ✅ |
Fail safe, NC mode (Unlocked when power is removed)
Holding Force: 1000kg / 2204.62lb
This electric strikes with 4-27/32" faceplates are designed for use with mortise or cylindrical type lockset with up to 3/4" latchbolt projection without deadbolt
Electrical actuation unlocks the keeper, releasing the latchbolt so the door may be opened without operating the latch itself. The electric strike must be positioned to accommodate offset mortise latches during installation
Attention: Before placing order, please check the size of your door’s frame to avoid wrong purchase
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| UHPPOTE | 9.85 | ✅ | ✅ | ✅ |
✅Field-selectable for fail-safe or fail-secure operation
✅2,200-lb (1000kg) Jaw strength, Tested to 500,000 cycles
✅Complete mounting hardware included, Screw terminals for ease of wiring
✅This Eelectric Door Strike can be used to convert cylindrical lock sets into an electronic access controlled locking system
✅Attention: Before placing order, please check the size of door’s frame to avoid wrong purchase
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| UHPPOTE | 9.85 | ✅ | ✅ | ✅ |
Fail secure, NO mode (Locked when power is removed)
This electric strikes with 4-27/32" faceplates are designed for use with mortise or cylindrical type lockset with up to 3/4" latchbolt projection without deadbolt
Electrical actuation unlocks the keeper, releasing the latchbolt so the door may be opened without operating the latch itself. The electric strike must be positioned to accommodate offset mortise latches during installation
Designed for Metal Frame drill a hole, then install it directly
Attention: Before placing order, please check the size of your door’s frame to avoid wrong purchase
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| UHPPOTE | 9.85 | ✅ | ✅ | ✅ |
✅Field-selectable for fail-safe or fail-secure operation
✅This strikes feature an ultra-compact design and adjustable stainless steel keepers with over 2,200lbs [1000kg] of holding force in fail secure mode. The strikes release electrically with up to 25 lbs of door preload. Single solenoid operates on 12VDC power. Provides electrical remote control, allowing door to open without actuation of the exit device.
✅Suitable for fire exit door with Push-rod lock.The operating principle of electric strike is that electromagnetism produces the force to pull or push the release lever so that to lock or open the door
✅This electric Strike is designed for rim exit devices with 3/4" [19.1 mm] Pullman latchbolts. For Indoor Use Only.
✅Push panic bar need buy seperately, please refer to ASIN: B06XWY91HQ
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| UHPPOTE | 9.85 | ✅ | ✅ | ✅ |
✅NC mode - (locked while supplied with power), fail safe mode
✅LED Indicates the door Status
✅Holding force about 280kg (600lbs)
✅Suitable For: Wooden door, Glass door, Metal door, Fireproof door
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| UHPPOTE | 9.85 | ❌ | ❌ | ❌ |
✅NC mode - (locked while supplied with power), fail safe mode
✅LED Indicates the door Status
✅Holding force about 350kg (800-lb)
✅Suitable For: Wooden door, Glass door, Metal door, Fireproof door
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Uhppote | 8 |
We've carried out a comprehensive analysis of 1,359 reviews on door lock replacement parts, using our selection criteria to identify the best options in the home improvement. Our findings reveal that most customers typically select door lock replacement parts priced around $62.72, with top brands including design house, schlage lock company, kwikset, prime-line, defender security, dwell+good, andersen windows, kvosit and passdone and han&hau
Our team of expert editors reviewed these high-quality items and handpicked the top 8 door lock replacement parts for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the home improvement category. These include amazon.com, choicelly llc, dwell+good, southern supply marketplace, colden solutions, kvosit store, passdone direct, techpro equinox and jasons hall and omnipotent pocket .
We are dedicated to assisting our users in finding the right parts Products based on their needs, saving them considerable time when choosing which door lock replacement parts to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.
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