Best Defender Security Door Lock Replacement Parts in 2026

Daisy
Last Updated: Jul 18, 2026

Summary of the Best Defender Security Door Lock Replacement Parts of 2026

Market Overview
Defender Security Door Lock Replacement Parts Reviewed
  • Reviews Analyzed: 48370 Items
  • PM Avg. Rating: 8.6 / 10
37 Products Evaluated
  • Highest Price: $43.09
  • Lowest Price: $2.81
  • Avg. Price: $14.86
#TOP1
Best Door Armor Best Door Lock Replacement Parts Best For Aluminum

Defender Security U 10827 Door Reinforcement Lock – Add Extra, High Security To Your Home And Prevent Unauthorized Entry – 3” Stop, Aluminum Construction (Satin Nickel Anodized Finish)

DEFENDER SECURITY
U 10827
2.50 X 1.38 X 3.00 inches

Reviews for DEFENDER SECURITY (PM Score)

9.9
Check on Amazon
Customer Reviews
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68 ✅ ✅ ✅

Features

KEEP YOUR HOME SAFE – Designed to withstand 800 lbs. of force, this U 10827 satin nickel finish door reinforcement lock helps to prevent doors from being kicked in, increasing your home security and keeping you and your family safe!

EASY INSTALLATION – The included 3” hardened screws make installation a breeze – extra security and peace of mind can be achieved in just minutes!

ADDITIONAL HOME SECURITY - Use this high security door reinforcement lock for additional home security on any swing-in door of any door thickness. It helps to ensure any door cannot be opened from the outside.

CHILD-SAFE AND TAMPER-RESISTANT – This door reinforcement lock has a spring-loaded design that is both child-safe and tamper-resistant. It can be installed higher on the door where your children can’t reach! Plus, not only can doors not be kicked in by intruders, it protects against lock picking and bumping while in the locked position.

WATCH THE VIDEO ON THIS PAGE for installation tips and operating instructions.

For all dimensional information please refer to the line art and compare to your needs before purchasing

#TOP2
Best For Defender Security Best For Defender Security

Prime-Line U 9524 3-1/2 In. Bright Brass Plated Backplate (2 Pack)

DEFENDER SECURITY
U 9524
0.06 X 3.50 X 3.50 Inches
0.10 Pounds

Reviews for DEFENDER SECURITY (PM Score)

9.6
Check on Amazon
Customer Reviews
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68 ✅ ✅ ✅

Features

Typically used on 2-1/8 inch bore lock sets

Converts a 2-3/4 inch to 2-3/8 in

Brass construction

Covers marred doors

Lock sets are not included

Mounting hardware included

Please refer to the line art drawing for dimensions and compare with your needs before ordering

Brands
Related
Top 10

Top 10 door lock replacement parts Brands on Amazon

Here is the list of top-rated brands that were evaluated by PM.

Brand Count
Defender Security 33
Prime-Line 4

Top 10 door lock replacement parts Brands Pie Chart

We've carried out a comprehensive analysis of 48,370 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 $14.86, 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 2 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.