Borg Mech-Digital Back-to-Back Adaptor Kit - Lockwood 3572 Mortice Lock - Suits 5000 Series Keypads
This Borg back-to-back (BTB) adaptor kit converts a Lockwood 3572 mortice lock that is already in the door so it can be worked by Borg 5000 Series mechanical digital keypads - one keypad on each side of the door. It is a stainless steel conversion part for an existing Lockwood lock, from our Scar & Adaptor Plates range.
A back-to-back door takes two Borg 5000 Series keypad-only units, such as the BL5000KSC / BL5000KSS lever keypad. The 5000 Series keypads this kit takes are listed under What This Kit Converts and the Keypads It Takes, and they sit in our Keypads for Smartlocks category. New to battery-free keypad locks? What Is a Mechanical Digital Lock? in Chapter 16 of our Buyer's Guide explains how they work.
Estimated Dispatch
Usually ships same day if ordered before 11am AEST (excludes weekends and Queensland public holidays).
Usually ships same day if ordered before 11am AEST (excludes weekends and Queensland public holidays).
Key Features
- Back-to-back (BTB) conversion for the Lockwood 3572 mortice lock: a Borg keypad on each side of the door (see What Is a Double-Sided Digital Mechanical Lock?).
- Takes Borg 5000 Series keypads, including the BL5000KSC / BL5000KSS, BL5000KMG and BL5401KSSDDA keypads and the Easicode Pro (ECP) BL5401KSSDDAECP.
- Stainless steel kit that keeps the Lockwood 3572 already in the door - the retrofit approach set out in The Retrofit Ecosystem.
- Battery-free: Borg keypads are fully mechanical, with no batteries to replace - see How a Mechanical Digital Lock Works.
- Code changing is set by the keypads you choose: ECP keypads change on the door (Borg Easicode Pro: The On-Door Change), non-ECP keypads change On The Bench (Borg Standard Chambers).
- Sister kits: BL50013572K is the single-keypad 5000 Series kit for the same lock, and BL3572KITBTB is the Lockwood 3572 back-to-back kit for Borg 2000 and 4000 Series keypads.
- Spare spindles: the standard BLMORTSPDL, and the extended BLMORTSPDL120 for thicker doors.
Suitable Uses
- Doors already fitted with a Lockwood 3572 mortice lock that is staying in place - identify the hardware with Existing Door Hardware in our Measuring Your Door chapter.
- Doors where a code is wanted on both sides, as long as the door is not part of a required exit path - see Doors in Required Exit Paths.
- Commercial doors already fitted with Lockwood mortice hardware, where keypad entry is wanted without replacing the lock - see Commercial & Heavy Duty and Better Suited to Commercial Door Hardware.
- Battery-free code entry in place of an electronic smart lock - compare the two in Mechanical Digital Lock vs Smart Lock.
Available Finish Options
Stainless Steel
(This Product)
STK BL50013572KBTB
Finish selection does not affect functionality, compliance, or performance.
Borg Adaptor Kits and Scar Plates - Item Code Family
This product is the bold row. Browse scar and adaptor plates in the Scar & Adaptor Plates category.
What This Kit Converts and the Keypads It Takes
This kit converts the Lockwood 3572 mortice lock and takes Borg 5000 Series keypads, one on each side of the door. The table lists the lock, the 5000 Series keypad-only units it takes (also in Keypads for Smartlocks) and the complete Borg 5000 Series locks from the same keypad family. If you choose the Easicode Pro (ECP) keypad, ask us to confirm it with this kit before you order.
Other ways to do the same job:
Accessories and Spares
Choose the spindle once the door is measured - see Door Thickness - and check the ordering note on the BLMORTSPDL120 page before ordering the extended spindle.
Full Specifications
Frequently Asked Questions
How many keypads does this back-to-back kit need?
Two. Back-to-back means a Borg 5000 Series keypad on each side of the door, so the kit pairs with two keypad-only units - for example two BL5000KSC / BL5000KSS lever keypads. The keypads we stock for it are listed under What This Kit Converts and the Keypads It Takes, and What Is a Double-Sided Digital Mechanical Lock? explains the set-up.
Two. Back-to-back means a Borg 5000 Series keypad on each side of the door, so the kit pairs with two keypad-only units - for example two BL5000KSC / BL5000KSS lever keypads. The keypads we stock for it are listed under What This Kit Converts and the Keypads It Takes, and What Is a Double-Sided Digital Mechanical Lock? explains the set-up.
Will a code be needed to get out as well as in?
Yes. With a keypad on both faces of the door, a code is needed to leave as well as to enter, so a back-to-back set-up is not for a door that forms a required exit path - see Not for Required Exit Paths and Doors in Required Exit Paths. Where people must be able to leave freely, Lockwood's 3572DX pairs an outside keypad with free exit from inside.
Yes. With a keypad on both faces of the door, a code is needed to leave as well as to enter, so a back-to-back set-up is not for a door that forms a required exit path - see Not for Required Exit Paths and Doors in Required Exit Paths. Where people must be able to leave freely, Lockwood's 3572DX pairs an outside keypad with free exit from inside.
Should I choose this kit or the single-keypad BL50013572K?
Choose by where you want the code. This kit puts a Borg 5000 Series keypad on both sides of the Lockwood 3572; BL50013572K is the 5000 Series kit for the same lock with a single keypad. Compare every kit in the item code family table, or ask us for a recommendation.
Choose by where you want the code. This kit puts a Borg 5000 Series keypad on both sides of the Lockwood 3572; BL50013572K is the 5000 Series kit for the same lock with a single keypad. Compare every kit in the item code family table, or ask us for a recommendation.
My door has a Lockwood 3582, not a 3572 - which kit do I need?
A 3582 kit - this one is for the Lockwood 3572. For a Lockwood 3582 with a Borg 5000 Series keypad the kit is BL50013582K, for outward-opening doors only; the back-to-back kit for a 3582 is BL3582KITBTB, for Borg 2000 and 4000 Series keypads. Not sure which lock you have? Existing Door Hardware in our Measuring Your Door chapter shows what to check.
A 3582 kit - this one is for the Lockwood 3572. For a Lockwood 3582 with a Borg 5000 Series keypad the kit is BL50013582K, for outward-opening doors only; the back-to-back kit for a 3582 is BL3582KITBTB, for Borg 2000 and 4000 Series keypads. Not sure which lock you have? Existing Door Hardware in our Measuring Your Door chapter shows what to check.
Will this kit suit a thicker door?
Thicker doors take the extended spindle. The standard spare spindle is BLMORTSPDL, and BLMORTSPDL120 is the extended version for thicker doors. Measure the door as shown in Door Thickness and ask us to confirm what your door needs before you order.
Thicker doors take the extended spindle. The standard spare spindle is BLMORTSPDL, and BLMORTSPDL120 is the extended version for thicker doors. Measure the door as shown in Door Thickness and ask us to confirm what your door needs before you order.
Additional Information
- Retrofit, not replacement: keeping the Lockwood 3572 in the door and adding Borg keypads is the approach set out in The Retrofit Ecosystem, and parts support matters as much as the first fit - see Spare Parts and Support Matter.
- Plan code changes before choosing keypads: Easicode Pro keypads change code on the door (What Does ECP Mean?); non-ECP keypads change On The Bench (The Bench Method). If codes will change regularly, even once a year, choose ECP keypads - Do You Always Need ECP? sets out the trade-off.
- Identify and measure first: the 3572 and 3582 take different kits and thicker doors take the extended spindle, so check the lock type (Bored Cylindrical vs Mortice Door Prep, Mortice Lever & Escutcheon) and the door thickness (Door Thickness) before ordering.
- Professional fitting: a back-to-back conversion means work on a mortice lock from both faces of the door. When DIY Is Appropriate in Chapter 12 sets out when to call a professional, and our advice and installation service can help.
- The complete-lock route: Lockwood's own 3572DX is a complete keypad mortice lock with a single outside keypad and free exit from inside - the Lockwood DX route for mortice doors covered in Better Suited to Commercial Door Hardware.
Warranty
Borg Locks Warranty - 12 Months (Australia)
All Borg locks are warranted against mechanical defects in materials and workmanship under normal use and service for a minimum of 12 months from date of sale. The warranty does not cover damage arising from misuse, vandalism, or improper installation. The lock must not be dismantled - doing so will invalidate the warranty. Proof of purchase required for all claims.
All Borg locks are warranted against mechanical defects in materials and workmanship under normal use and service for a minimum of 12 months from date of sale. The warranty does not cover damage arising from misuse, vandalism, or improper installation. The lock must not be dismantled - doing so will invalidate the warranty. Proof of purchase required for all claims.
Purchased through Terry's Tradies Pty Ltd or one of its associated trading names? Contact us first - we will manage your warranty claim with the Australian distributor (LSC) on your behalf. This warranty operates alongside your rights under the Australian Consumer Law.
Download PDF Resources
Borg 5000 Series Accessories (PDF)
Borg's one-page BL5000 Series accessories sheet (LSC) - covers the single-keypad BL50013572K, the 3582 kit and the SPBL5001 scar plates. The back-to-back kit itself is in the BDS catalogue.
Borg's one-page BL5000 Series accessories sheet (LSC) - covers the single-keypad BL50013572K, the 3582 kit and the SPBL5001 scar plates. The back-to-back kit itself is in the BDS catalogue.
BDS Security Products Catalogue 2024/2025 - Borg Adapter Plates (PDF)
The BDS security products catalogue (LSC) - page 44 covers the Borg 2000 & 5000 Series adapter plates, including BL50013572KBTB in stainless steel with its plate dimensions. The mortice lock spindle for Borg 2000 and 5000 Series conversions is on page 45.
The BDS security products catalogue (LSC) - page 44 covers the Borg 2000 & 5000 Series adapter plates, including BL50013572KBTB in stainless steel with its plate dimensions. The mortice lock spindle for Borg 2000 and 5000 Series conversions is on page 45.
Borg BL5000 Series Brochure (PDF)
Borg's BL5000 Series brochure - includes dimensioned drawings of the 5000, 5400 and 5100 Series keypads.
Borg's BL5000 Series brochure - includes dimensioned drawings of the 5000, 5400 and 5100 Series keypads.
BL50013572KBTB Back-to-Back Adaptor Kit - FAQ, Fitting and Buying Guide
Buying and fitting questions for putting Borg 5000 Series keypads on both sides of a Lockwood 3572 mortice lock. For the bigger picture, see Chapter 16 - Mechanical Digital Locks and Chapter 13 - Smart Lock FAQ in our Buyer's Guide.
Choosing the Keypads
Which Borg 5000 Series keypads suit this kit?
It takes these Borg 5000 Series keypad-only units: the BL5000KSC / BL5000KSS and BL5000KMG lever keypads, and the BL5401KSSDDA and BL5401KSSDDAECP flat bar lever keypads (the second is Easicode Pro). A back-to-back door needs two, one for each side. Already have a Borg keypad? Ask us to check it before you order, or browse Keypads for Smartlocks.
It takes these Borg 5000 Series keypad-only units: the BL5000KSC / BL5000KSS and BL5000KMG lever keypads, and the BL5401KSSDDA and BL5401KSSDDAECP flat bar lever keypads (the second is Easicode Pro). A back-to-back door needs two, one for each side. Already have a Borg keypad? Ask us to check it before you order, or browse Keypads for Smartlocks.
Which keypads let me change the code on the door?
Easicode Pro (ECP) keypads, such as the BL5401KSSDDAECP. An ECP code change is done on the door rather than on the bench - Borg Easicode Pro: The On-Door Change covers the method, with The 3000 and 5000 series in action for the 5000 Series, and What Does ECP Mean? explains the term. If the code will change regularly, even once a year, ECP keypads are the practical choice - ask us to confirm them with this kit before you order.
Easicode Pro (ECP) keypads, such as the BL5401KSSDDAECP. An ECP code change is done on the door rather than on the bench - Borg Easicode Pro: The On-Door Change covers the method, with The 3000 and 5000 series in action for the 5000 Series, and What Does ECP Mean? explains the term. If the code will change regularly, even once a year, ECP keypads are the practical choice - ask us to confirm them with this kit before you order.
How do the non-ECP 5000 Series keypads change code?
On The Bench. The BL5000KSC / BL5000KSS, BL5000KMG and BL5401KSSDDA are non-ECP keypads, so a code change is a bench job rather than a quick change on the door - Borg Standard Chambers: Series Notes covers the 5000 Series specifics, and How Long Does a Code Change Really Take? gives realistic times. Expecting to re-code, even yearly? Choose an ECP keypad instead.
On The Bench. The BL5000KSC / BL5000KSS, BL5000KMG and BL5401KSSDDA are non-ECP keypads, so a code change is a bench job rather than a quick change on the door - Borg Standard Chambers: Series Notes covers the 5000 Series specifics, and How Long Does a Code Change Really Take? gives realistic times. Expecting to re-code, even yearly? Choose an ECP keypad instead.
Can this kit be used with the keypads from a factory back-to-back Borg lock such as the BL5051?
Ask us before relying on that pairing - we will check your lock and keypads before you order. The BL5051 and BL5051MGPROECP are complete Borg 5000 Series back-to-back locks from the same 5000 Series keypad family this kit takes.
Ask us before relying on that pairing - we will check your lock and keypads before you order. The BL5051 and BL5051MGPROECP are complete Borg 5000 Series back-to-back locks from the same 5000 Series keypad family this kit takes.
Checking the Lock and the Door
How do I check that the lock in my door is a Lockwood 3572?
Start with the hardware and a tape measure. Existing Door Hardware in Chapter 2 of our Buyer's Guide shows the mortice formats (mortice lever and escutcheon, mortice with longplate furniture), and Measuring Your Lock Backset shows how to measure backset - the Lockwood 3572 we list is a 60mm backset lock, while the Lockwood 3582 is a short backset lock that takes a 3582 kit. Still unsure? Ask us for a recommendation.
Start with the hardware and a tape measure. Existing Door Hardware in Chapter 2 of our Buyer's Guide shows the mortice formats (mortice lever and escutcheon, mortice with longplate furniture), and Measuring Your Lock Backset shows how to measure backset - the Lockwood 3572 we list is a 60mm backset lock, while the Lockwood 3582 is a short backset lock that takes a 3582 kit. Still unsure? Ask us for a recommendation.
I have Borg 2000 or 4000 Series keypads - which Lockwood 3572 kit do I need?
A 2000 and 4000 Series kit - match the kit to the keypad series. For a keypad on each side of a Lockwood 3572 it is BL3572KITBTB (see the keypads it takes); for one keypad it is BL3572KIT. This kit, BL50013572KBTB, is the Borg 5000 Series version.
A 2000 and 4000 Series kit - match the kit to the keypad series. For a keypad on each side of a Lockwood 3572 it is BL3572KITBTB (see the keypads it takes); for one keypad it is BL3572KIT. This kit, BL50013572KBTB, is the Borg 5000 Series version.
Can I have a key override on a Lockwood 3572 conversion?
In this adaptor family, key override comes with the key override (KOR) plate 09351550 (BL3572KOR), the Lockwood 3572 conversion with key override for Borg 2000 and 4000 Series keypads. Lockwood's own 3572DXKO is a keypad mortice lock with key override. Key Override Can Be Important explains when it matters.
In this adaptor family, key override comes with the key override (KOR) plate 09351550 (BL3572KOR), the Lockwood 3572 conversion with key override for Borg 2000 and 4000 Series keypads. Lockwood's own 3572DXKO is a keypad mortice lock with key override. Key Override Can Be Important explains when it matters.
Fitting and Alternatives
Should I fit this kit myself or use a locksmith?
A locksmith or experienced installer is the safer choice unless you are confident with mortice lock work: the kit converts the lock already in the door and puts a keypad on each face, and a wrong spindle position is one of the most common fitting mistakes (Wrong spindle position). Gold Coast customers can book professional supply and installation or a free site survey, and our advice and installation page covers the options.
A locksmith or experienced installer is the safer choice unless you are confident with mortice lock work: the kit converts the lock already in the door and puts a keypad on each face, and a wrong spindle position is one of the most common fitting mistakes (Wrong spindle position). Gold Coast customers can book professional supply and installation or a free site survey, and our advice and installation page covers the options.
Should I convert the Lockwood 3572 or fit a complete keypad lock instead?
Convert when you want to keep the Lockwood 3572 and have a Borg keypad on both sides. Choose a complete lock when one outside keypad with free exit from inside suits the door better - Lockwood's 3572DX does that as a complete 3572 keypad mortice lock. For the brand choice, compare The Three Ranges in Chapter 16 and Lockwood vs Borg vs Carbine; complete Borg locks are in Digital Mechanical Locks.
Convert when you want to keep the Lockwood 3572 and have a Borg keypad on both sides. Choose a complete lock when one outside keypad with free exit from inside suits the door better - Lockwood's 3572DX does that as a complete 3572 keypad mortice lock. For the brand choice, compare The Three Ranges in Chapter 16 and Lockwood vs Borg vs Carbine; complete Borg locks are in Digital Mechanical Locks.
Does a Borg keypad conversion need batteries or power?
No. Borg keypads are mechanical digital - the code works through the keypad's own mechanism, with no batteries, wiring or app. See the Borg brand profile, Inside the coding chamber, and Mechanical Digital Lock vs Smart Lock for how they compare with electronic locks.
No. Borg keypads are mechanical digital - the code works through the keypad's own mechanism, with no batteries, wiring or app. See the Borg brand profile, Inside the coding chamber, and Mechanical Digital Lock vs Smart Lock for how they compare with electronic locks.
Related Products, Guides and Chapters
Sister kits and plates: BL50013572K · BL3572KITBTB · BL3572KIT · BL50013582K · BL3582KITBTB · 09351550 (BL3572KOR)
Borg 5000 Series keypads: BL5000KSC / BL5000KSS · BL5000KMG · BL5401KSSDDA · BL5401KSSDDAECP
Complete Borg 5000 Series locks: BL5001 · BL5001MGPROECP · BL5051 · BL5051MGPROECP · BL5401SSDDAECP · BL5401DDAMGPROECP · Borg
Lockwood: Lockwood 3572 Mortice Lock · Lockwood 3572DX · Lockwood 3572DXKO · Lockwood · Lockwood brand profile
Spares: BLMORTSPDL spindle · BLMORTSPDL120 extended spindle · BDS
Categories: Scar & Adaptor Plates · Keypads for Smartlocks · Digital Mechanical Locks · Smart Lock Accessories
Buyer's Guide: What Is a Mechanical Digital Lock? (Ch 16) · Decoding Borg Names (Ch 16) · Changing the Code (Ch 16) · Door Thickness (Ch 02) · Bored Cylindrical vs Mortice Door Prep (Ch 02) · When DIY Is Appropriate (Ch 12) · Borg brand profile (Ch 10)
Blogs: What Is a Double-Sided Digital Mechanical Lock? · Doors in Required Exit Paths · The Bench Method · Do You Always Need ECP? · The Retrofit Ecosystem · How a Mechanical Digital Lock Works · Three Brands, Three Code Change Methods
Advice and fitting: Advice and Installation · Qualified Locksmith Recommendation · Book a Site Survey
PDF Files - BL50013572KBTB
Borg 5000 Series Accessories (PDF)
Borg's one-page BL5000 Series accessories sheet (LSC) - covers the single-keypad BL50013572K, the 3582 kit and the SPBL5001 scar plates. The back-to-back kit itself is in the BDS catalogue.
Borg's one-page BL5000 Series accessories sheet (LSC) - covers the single-keypad BL50013572K, the 3582 kit and the SPBL5001 scar plates. The back-to-back kit itself is in the BDS catalogue.
BDS Security Products Catalogue 2024/2025 - Borg Adapter Plates (PDF)
The BDS security products catalogue (LSC) - page 44 covers the Borg 2000 & 5000 Series adapter plates, including BL50013572KBTB in stainless steel with its plate dimensions. The mortice lock spindle for Borg 2000 and 5000 Series conversions is on page 45.
The BDS security products catalogue (LSC) - page 44 covers the Borg 2000 & 5000 Series adapter plates, including BL50013572KBTB in stainless steel with its plate dimensions. The mortice lock spindle for Borg 2000 and 5000 Series conversions is on page 45.
Borg BL5000 Series Brochure (PDF)
Borg's BL5000 Series brochure - includes dimensioned drawings of the 5000, 5400 and 5100 Series keypads.
Borg's BL5000 Series brochure - includes dimensioned drawings of the 5000, 5400 and 5100 Series keypads.
Borg Locks Warranty
Borg products sold in Australia are covered against mechanical defects in materials and workmanship under normal use and service. Warranty claims are handled by Terry's Tradies Pty Ltd and its associated websites, trading names, and subsidiaries.
Warranty Summary
What the Warranty Covers
- Mechanical defects in materials and workmanship
- Defects arising under normal use and service conditions
- Repair or replacement of defective units at the discretion of the Australian distributor (LSC)
What the Warranty Does Not Cover
- Damage arising from misuse, vandalism, or abuse
- Damage resulting from improper installation
- Locks that have been dismantled - dismantling invalidates the warranty
- Normal wear and tear
- Cosmetic damage not affecting function
How to Make a Claim
For full returns and warranty claim procedures, visit our Returns & Warranty page - this is kept up to date and is the authoritative reference for current claim steps.
- Contact Terry's Tradies Pty Ltd first if you purchased through us or one of its associated trading names - we will assess the issue and manage the warranty process with LSC on your behalf. You do not need to contact LSC or Borg Locks UK directly.
- Have your proof of purchase ready (receipt or order confirmation).
- Warranty claims for Borg products in Australia are processed through LSC, the authorised Australian importer and distributor. Where an item is returned to LSC, freight charges must be prepaid and the item returned within the warranty period.
- If LSC finds the returned item to be defective, it will be repaired or replaced, and a detailed assessment report is provided to the customer after examination.
Australian Consumer Law
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure. The Borg manufacturer warranty above operates alongside - and does not limit - these statutory rights.
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure. The Borg manufacturer warranty above operates alongside - and does not limit - these statutory rights.
