Classic Brass Interior Mortise Lock With Thumbturn Hole
Classic Brass Interior Mortise Lock With Thumbturn Hole
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Vintage-style Hardware
- High quality & well-built
- Traditional & common size interior mortise lock for doors
- Square recess hole in lock for thumb turn operation for deadbolt (thumbturn not included in this set)
- 2-1/2" backset
- Solid brass plate, latch & throw-bolt
- Thick steel casing with black japanned finish
- Durable & well-built internal mechanism for sturdy operation
- Reversible for right or left applications
- Doorknob spindle hub: 9/32" (7 mm)
- Square recess size for thumbturn piece: 3/16"
- For the thumbturn piece to operate bolt, See here
- *Note: Strike plate & thumbturn piece is not included
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A traditional & authentic old-style interior mortise lock set with a thumbturn recess hole for the deadbolt operation & locking of doors (thumbturn piece not included). This lock is a replica of common-style mortise locks from the past century, although it will easily fit in with any time period from early 20th century to current modern styles. The front plate, latch & throw-bolt are made of high quality solid brass for a real handsome look. The lockset case is made of thick steel with a well-built internal mechanism & bolt, unlike many basic locks out on the market today. The 2-1/2" backset measures from the edge (front) of the plate, to the center of the hole. This old-style privacy lockset is available in unlacquered brass (will patina naturally), oil rubbed bronze, & polished nickel finishes. Beautify & secure your doors with this handsome & classic piece of hardware. *Note: Strike plate & thumbturn piece is not included. For the thumbturn piece to operate bolt, See here.
Hardwick & Sons is pleased to offer vintage-style hardware for the many people who desire to fashion their homes with charm, quality, & style. The traditional-style hardware that we showcase are true & faithful reproductions of classic hardware pieces found in the many homes from across America throughout the past century.
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Product Backset Case Size Face Plate Keyhole to Knob Hub Screw Hole Spacing Square Hole Size for Thumbturn Piece
Strike Plate Size Model # Interior Mortise Lock 2-1/2" 3-1/8" High x 3-5/8" Wide x 9/16" Thick 5-1/4" High x 15/16" Wide 2-1/4" 4-5/8" 3/16" 3-7/8" Long x 1" Wide (8887)
For California Residents:
WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov
WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov/wood
- Customer Reviews5.0 Based on 4 Reviews5 ★100%44 ★0%03 ★0%02 ★0%01 ★0%0Customer Photos
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Be the first to review this itemFilter Reviews:×Clear filterMore FiltersST02/17/2025Scott T.United States
Vintage latch
Great quality, packed well, and great service. 1st Class, Thank You!
GB06/21/2024Greg B.United States
High quality
This is actually higher quality than the 101-year old mortise lock that it replaced. The brass end piece on the door across from the striker plate is massive. Although I had to move my knob escutcheons over slightly to compensate. Also had to shift my existing striker plate up 1/8” inch. One problem that I did have was that my existing thumb turn would not insert fully (see photo). I had ordered an emergency opening for the outside and that shaft fit fine. So, the tolerance on this lock is tighter than the original. Tried filing the original thumb turn shaft down. But, gave up and ordered a new one. I would suggest ordering the kit that includes the thumb turn and striker plate or ordering the thumb turn separately to avoid a second shipping cost.
A07/27/2023AlexUnited States
Mortise lock set
Installed 8 mortise lock sets into existing doors, fit right in. Very happy with materials and service.
SS02/21/2023Steve S.United States
Exceptional Customer Service
Hardware is top of the line, but things happen. I received one lock that was broken in shipping. They sent another one out ASAP and I had it within 3 days. Would highly recommend them as a company and vouch for their products.
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- Reviews
- Questions
Thank you for submitting a review!
Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Vintage latch
Great quality, packed well, and great service. 1st Class, Thank You!

High quality
This is actually higher quality than the 101-year old mortise lock that it replaced. The brass end piece on the door across from the striker plate is massive. Although I had to move my knob escutcheons over slightly to compensate. Also had to shift my existing striker plate up 1/8” inch. One problem that I did have was that my existing thumb turn would not insert fully (see photo). I had ordered an emergency opening for the outside and that shaft fit fine. So, the tolerance on this lock is tighter than the original. Tried filing the original thumb turn shaft down. But, gave up and ordered a new one. I would suggest ordering the kit that includes the thumb turn and striker plate or ordering the thumb turn separately to avoid a second shipping cost.

Mortise lock set
Installed 8 mortise lock sets into existing doors, fit right in. Very happy with materials and service.

Exceptional Customer Service
Hardware is top of the line, but things happen. I received one lock that was broken in shipping. They sent another one out ASAP and I had it within 3 days. Would highly recommend them as a company and vouch for their products.