Borg BLS517BMG Knob - External Grade - Suits 5000 Series - Chrome Plate
The Borg BLS517BMG is a spare external grade knob in chrome plate for Borg 5000 Series locks. It is supplied as the knob only and retrofits in place of a standard lever where a knob is preferred.
The external grade build is weather resistant and suits sheltered outdoor doors, but it is not suitable for coastal or saline areas. For fully exposed coastal doors the Marine Grade Pro knob is the better choice. When converting from a lever to a knob, confirm spindle and latch compatibility with us first.
The BLS517BMG is brought in to order and cannot be returned for change of mind, so confirm it is the right knob for your lock and contact us for the current lead time before ordering. Your rights under the Australian Consumer Law for faulty goods are unaffected.
Key Features
- Genuine Borg spare knob for the 5000 Series.
- External grade build - weather resistant for sheltered outdoor doors.
- Not suitable for coastal or saline areas.
- Chrome plate finish; retrofits in place of a standard lever.
- Supplied as a single knob - knob only.
What's in the Box
- 1 x Borg 5000 Series external grade knob (chrome plate)
Suitable Uses
- Retrofitting a knob in place of a lever on an external Borg 5000 Series lock.
- Servicing or refurbishing an external installation.
- Sheltered outdoor doors where a knob is preferred to a lever - the complete locks are in our Digital Mechanical Locks range.
Available Finish Options

Chrome Plate
(This Product)
STK BLS517BMG

Finish selection does not affect the mechanical function of the part.
Compatible Locks
The BLS517BMG retrofits in place of the standard lever on the Borg 5000 Series lever locks below. Each row opens the section of the lock's page that lists the knob. Confirm your lock model, spindle and latch with us before ordering.
The knob comes in four finishes - see Available Finish Options. Browse the complete locks under Digital Mechanical Locks and more spares under smart lock accessories.
Full Specifications
Frequently Asked Questions
It is made for the Borg 5000 Series - the four lever locks under Compatible Locks, such as the BL5001. Confirm your lock model before ordering.
No - this external grade knob is not suitable for coastal or saline areas. For exposed salt-air positions, the Marine Grade Pro knob is the better choice; our MG Pro and ECP guide explains the grades.
Yes - it retrofits in place of a standard lever on compatible 5000 Series locks. Confirm spindle and latch compatibility when converting.
Yes - the BL5001HMG is the external grade lever handle for the 5000 Series, in polished chrome.
Additional Information
Warranty
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.
Download PDF Resources
Borg's one-page BL5000 Series brochure - the three handle styles (5000 round bar, 5400 flat bar and 5100 knob), the series finishes and dimensioned drawings of the keypads and inside handles. (Host lock series document.)
Borg's manual for the On The Bench (non-ECP) BL5000 Series - parts list, handing, fitting, the code change, troubleshooting and the drilling template. (Host lock series document.)
Borg's one-page BL5000 Series accessories sheet (LSC) - the keypad-only units, Lockwood conversion kits and scar plates for the 5000 Series. It does not list this knob. (Host lock series document.)
PDF Files - BLS517BMG
Borg's one-page BL5000 Series brochure - the three handle styles (5000 round bar, 5400 flat bar and 5100 knob), the series finishes and dimensioned drawings of the keypads and inside handles. (Host lock series document.)
Borg's manual for the On The Bench (non-ECP) BL5000 Series - parts list, handing, fitting, the code change, troubleshooting and the drilling template. (Host lock series document.)
Borg's one-page BL5000 Series accessories sheet (LSC) - the keypad-only units, Lockwood conversion kits and scar plates for the 5000 Series. It does not list this knob. (Host lock series document.)
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
- 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.
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.
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