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Antique brass F function turnpiece kit for mortise double cylinder lock

Marks USA

Marks USA K9117-5 Antique Brass F Function Turnpiece Kit

SKU CH-60JW-0DFB8 MPN K9117-5

Antique brass F-function turnpiece kit for 21AC, 22AC or mortise double-cylinder locks

  • Surface finishAntique Brass
  • Sold asEach
  • Product typeF Function Turnpiece
  • Key featuresMarks USA
  • F Function turnpiece operates mortise double cylinder locks
  • Antique Brass US5 finish matches period hardware style
  • Kit includes components for 22AC and 21AC models
  • Marks USA construction delivers commercial-grade reliability
  • Sold individually for precise replacement ordering

Product Identity

The Marks USA K9117-5 is an antique brass F function turnpiece kit designed for mortise double cylinder locks. It serves as a replacement or upgrade component for compatible Marks lock bodies.

Compatibility Check

Verify that the existing lock is a Marks 21AC or 22AC mortise double cylinder model before ordering. This kit is built specifically for those lock bodies and will not fit other brands or lock types.

Durability and Use

The solid brass construction resists corrosion and daily wear in normal indoor or sheltered exterior applications. No electrical power or cooling is involved, so thermal output and noise are non-existent during operation.

How it compares

Measured against everything we stock in Door Lock Sets & Deadbolts, at today’s prices. Recalculated every night.

Price $55.99
Typical for this category: the median of 2,145 items is $55.99.

Specifications

Product
Model nameK9117-5
Product typeF Function Turnpiece
Size & build
Surface finishAntique Brass

Questions about this item

Does the K9117-5 kit include the mortise lock body or only the turnpiece?

The kit supplies the F function turnpiece in antique brass; the 22AC or 21AC mortise double cylinder lock body must be purchased separately.

When should I select the K9117-5 over other turnpiece kits?

Choose the K9117-5 when you need an antique brass F function turnpiece for a 22AC or 21AC mortise double cylinder lock.

What does the F function turnpiece do once installed on the lock?

The F function turnpiece provides inside thumb-turn operation to retract the latchbolt while the outside cylinder remains locked by key.

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