Classic Brass Interior Mortise Lock Set With Thumbturn
Classic Brass Interior Mortise Lock Set With Thumbturn
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Vintage-style Hardware
- High quality & well-built internal mechanism for sturdy operation
- Traditional & common size interior mortise lock for doors
- Thumb turn operation for bolt
- 2-1/2" backset
- Solid brass plates, thumbturn piece, latch, & throw-bolt
- Thick steel casing with black japanned finish
- Reversible for right or left applications
- Doorknob spindle hub: 9/32" (7 mm)
- Set includes a mortise strike, a solid brass thumb-turn, & four flat head screws
- For an emergency release key for the outside, see here.
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A traditional & authentic old-style interior mortise lock set with a thumbturn for the deadbolt operation & locking of doors. 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 plates, thumb turn piece, 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. For an emergency release key for the outside, 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 Reviews4.9 Based on 19 Reviews5 ★95%184 ★5%13 ★0%02 ★0%01 ★0%0Customer Photos
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Be the first to review this itemFilter Reviews:×Clear filterMore FiltersRD02/09/2025Roseann D.United States
Great for restore vintage locks
The customer service was amazing. They emailed me back regarding all my questions. Received the lock and it was a great replacement.
BU01/02/2025Brittni U.United States
Worked perfectly! Easy install. Functional doors once more!
CK08/28/2024Chris K.United States
Solid product and service
The mortise lock dimensions conform to the original (and authentic) antique mortise lock that I replaced (circa 1919, or thereabouts). It was hard to find a lock mechanism that conformed to the original dimensions and I’m glad H&S takes pride in stocking the correct product(s) for old houses. Delivery was quick and I was given a tracking number and updates while the order was en route. Great service!
NM02/01/2024Norman M.United States
Mortise lock set
The item is well suited for my needs and is better than great in looks and substance. The only problem I have is the E clamp securing the crescent turn to the escutcheon is impossible to remove without breaking it. Without removing it I could not use my existing doorknob/thumb lock escutcheon. I think I have a work around, but won’t know until I try securing the new e-clamp I purchased separately. I found the manufacturer's customer service response to my inquiry on this issue unsatisfactory.
LA01/15/2024Lee A.United States
Replacement Mortise Lock Set
Been on a mission to paint the doors in my old home, polish the mortise lock sets and brass keyholes. Ran into an issue where the thumbscrew on a bathroom door broke on disassembly. Ordered the classic brass interior mortise lock set with thumbturn as a replacement. Getting an exact match was unlikely and this was not an exact match. But, it was close enough and I got it work. Love the design with the thumbscrew where an old skeleton key would have been used. The skeleton keys for the mortise locks I have are long gone. If a similar situation arises, I would not hesitate to order again. Shipment was fast. Price was reasonable!
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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!

Great for restore vintage locks
The customer service was amazing. They emailed me back regarding all my questions. Received the lock and it was a great replacement.

Worked perfectly! Easy install. Functional doors once more!

Solid product and service
The mortise lock dimensions conform to the original (and authentic) antique mortise lock that I replaced (circa 1919, or thereabouts). It was hard to find a lock mechanism that conformed to the original dimensions and I’m glad H&S takes pride in stocking the correct product(s) for old houses. Delivery was quick and I was given a tracking number and updates while the order was en route. Great service!

Mortise lock set
The item is well suited for my needs and is better than great in looks and substance. The only problem I have is the E clamp securing the crescent turn to the escutcheon is impossible to remove without breaking it. Without removing it I could not use my existing doorknob/thumb lock escutcheon. I think I have a work around, but won’t know until I try securing the new e-clamp I purchased separately. I found the manufacturer's customer service response to my inquiry on this issue unsatisfactory.

Replacement Mortise Lock Set
Been on a mission to paint the doors in my old home, polish the mortise lock sets and brass keyholes. Ran into an issue where the thumbscrew on a bathroom door broke on disassembly. Ordered the classic brass interior mortise lock set with thumbturn as a replacement. Getting an exact match was unlikely and this was not an exact match. But, it was close enough and I got it work. Love the design with the thumbscrew where an old skeleton key would have been used. The skeleton keys for the mortise locks I have are long gone. If a similar situation arises, I would not hesitate to order again. Shipment was fast. Price was reasonable!