Pair of Set Screws & Hex Key for Doorknobs ~ 28 TPI x 1/4" Size
Pair of Set Screws & Hex Key for Doorknobs ~ 28 TPI x 1/4" Size
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Vintage-style Hardware
- Designed for traditional-style doorknobs with a spindle
- 28 TPI x 1/4" diameter set screw
- 1/4" length
- Hex recessed head
- Includes a 1/8" hex key
- Sold as two set screws in pack
- Available in brass finish, oil rubbed bronze, & polished nickel finishes
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These set screws work with traditional-style doorknobs that take threaded spindles. The thread size of the set screw is 28 TPI x 1/4" diameter width, which is a common thread size for holes on old-style door knobs. The screws are made of steel material & are sold in pairs. 1/8" hex key is included. Available in brass finish, oil rubbed bronze, & polished nickel finishes.
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 Thread Size Diameter Set Screw Overall Length Model # Pair of Set Screws & Hex Key for Doorknobs ~ 28 TPI x 1/4" Long 28 TPI 1/4" 1/4" Long
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 Reviews4.6 Based on 8 Reviews5 ★75%64 ★13%13 ★12%12 ★0%01 ★0%0Customer Photos
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Be the first to review this itemFilter Reviews:×Clear filterMore FiltersKS02/10/2025Kevin S.United States
Thank you !
The items you sent were perfect ! Thank you
EN02/01/2024EUGENIE N.United States
Modern Set Screws don't fit vintage glass doorknobs
Great store! Timely delivery and good product for modern doorknobs. My glass doorknobs are almost 100 years old and the set screws were just a hair too large and wouldn't screw in. I bought a new glass doorknob that is larger than vintage one but blends in nicely.
RB01/06/2024Roy B.United States
Set screw for old antique doorknob
Didn't work. Wasn't sure whether the set screw would work on this old antique door knob, the original set screw had finally stripped. Looked like the right size, decided to try it, but the screw didn't fit. No harm done, I had no other good options, and it wasn't expensive.
DS10/08/2023David S.United States
Set screws for antique glass door handles
We bought the 1/4-32 x 5/16” set screws for our antique glass door handles. Unfortunately, they must need 5/16-32 x 5/16” set screws and these are not listed on Hardwick and Sons - or anywhere. No problem with the quality of the product delivered though.
EK02/24/2023Ewa K.United States
Finally I found the screw to my old door knobs!
It is little tight but it fits so I am happy
- 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!

Thank you !
The items you sent were perfect ! Thank you

Modern Set Screws don't fit vintage glass doorknobs
Great store! Timely delivery and good product for modern doorknobs. My glass doorknobs are almost 100 years old and the set screws were just a hair too large and wouldn't screw in. I bought a new glass doorknob that is larger than vintage one but blends in nicely.

Set screw for old antique doorknob
Didn't work. Wasn't sure whether the set screw would work on this old antique door knob, the original set screw had finally stripped. Looked like the right size, decided to try it, but the screw didn't fit. No harm done, I had no other good options, and it wasn't expensive.

Set screws for antique glass door handles
We bought the 1/4-32 x 5/16” set screws for our antique glass door handles. Unfortunately, they must need 5/16-32 x 5/16” set screws and these are not listed on Hardwick and Sons - or anywhere. No problem with the quality of the product delivered though.

Finally I found the screw to my old door knobs!
It is little tight but it fits so I am happy