Prime-Line E 28315 Mortise Fluted Glass Door Knobs – Satin Nickel, 2-Inch OD Interior Replacement

Timeless interior upgrade with fluted glass

The Prime-Line E 28315 Mortise Style Fluted Glass Door Knobs bring a refined, period-appropriate touch to interior doors. The clear fluted glass catches the light with a subtle sparkle, while the satin nickel base offers a soft, modern contrast. This combination makes it a versatile choice for antique or vintage interiors, from living rooms to studies, home offices, and hallways.

What you get and how it works

• Two 2-inch outside diameter knobs, ready to pair with a mortise lock set (not included).
• A steel spindle measuring 17/64 inch by 3-1/2 inch, with 3/8-20 threads for a secure fit.
• Diecast base with set screws for fastening to the square spindle.
• Compatibility with square drive spindle systems commonly found in antique and vintage door hardware.
• Adjustability to accommodate varying door thicknesses, helping you achieve a snug, aligned fit.

Important notes and compatibility

• This kit is for interior use only and does not include the internal mortise lock body, rosettes, trim, strike plates, latch, or fasteners.
• For matching rosettes and latch, see Prime-Line model E 2496.
• Not suitable for pre-bored doors with large or newer style knob holes unless prep work is performed first.

Installation tips for best results

• To prevent slippage, apply a small amount of Loctite ThreadLocker 271 to the set screw threads after tightening.
• If you are working with large mounting holes, fill the rosette mounting area to create a solid surface for rosette fasteners using a hardening filler such as Fix-It-All or Bondo, taking care to finish without damaging the door finish.

Why this style stands out

• Classic fluted glass with a satin nickel finish evokes vintage charm while offering dependable hardware for interior spaces.
• Durable diecast base and precise threading support easy maintenance and a secure feel when turning the knob.
• Designed to replace broken knobs on antique doors, preserving the door’s original character without a full hardware refresh.

Note: This set focuses on the knob pair and spindle; the overall door hardware project may require additional components and fit adjustments based on your door’s configuration. If you’re updating an interior door with a vintage aesthetic, the E 28315 provides a tasteful combination of glass clarity, classic profile, and a clean satin finish that can complement a wide range of decors.