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Straight steel spindle with satin chrome finish

Progressive Hardware Co., Inc.

Progressive Hardware Co., Inc. 44-20-5 Straight Steel Spindle 9/32" Square x 5" Long 20 TPI Door Lock

SKU CH-WWRG-Y3J9D MPN 44-20-5

Straight steel spindle, 9/32 inch square by 5 inches long with 20 TPI threading, fits Corbin Russwin, Yale and other vintage knobs

  • FinishSatin Chrome
  • Selling UnitBox
  • KeyingKeyed Different
  • Straight spindle fits vintage knobs from major brands
  • 9/32" square steel shaft resists twisting under torque
  • 20 TPI threads on both ends match original hardware
  • 5" length spans standard door thicknesses
  • Satin chrome finish protects steel from corrosion

Replacement Spindle for Vintage Knobs

This straight steel spindle replaces worn originals on Corbin Russwin, Yale, Marks, Norwalk, National, Baldwin and Progressive locksets. The 9/32" square profile and 20 threads per inch match the threading on many vintage door knobs. It is supplied new in a box and keyed different for individual installations.

Steel Construction with Dual Threading

The spindle is machined from steel with a satin chrome finish for corrosion resistance. Threads run 20 TPI on both ends while the centre section remains unthreaded, allowing the spindle to pass through the latch mechanism and engage knobs on either side of the door. The five-inch overall length suits standard door thicknesses.

Fixed Dimensions Limit Adaptability

The 9/32" square cross-section and five-inch length are fixed, so the spindle cannot be shortened or used with locks requiring a different square size. The 20 TPI threading is not compatible with modern metric or coarse-thread hardware. Buyers needing a swivel spindle, a different square dimension or a longer reach will need a separate part.

Highlights

  • Straight spindle fits vintage knobs from major brands
  • 9/32" square steel shaft resists twisting under torque
  • 20 TPI threads on both ends match original hardware
  • 5" length spans standard door thicknesses
  • Satin chrome finish protects steel from corrosion

Specifications

BrandProgressive Hardware Co., Inc.
Model44-20-5
FinishSatin Chrome
Selling UnitBox
KeyingKeyed Different

Questions about this item

What does the 20 TPI thread specification mean for compatibility?

The spindle uses 20 threads per inch on both ends, matching the thread pitch required by many vintage and current knob sets including Corbin Russwin, Yale, Marks, Norwalk, National, Baldwin and Progressive hardware.

Will the 9/32 inch square section fit my existing door thickness?

The straight spindle measures 9/32 inch square by 5 inches long with an unthreaded centre section, designed to span standard door thicknesses used with the listed knob brands.

How do I install the spindle without stripping the threads?

Thread each end into the knob hubs by hand until snug, then tighten the set screws on the knobs; forcing the spindle with pliers often cross-threads the 20 TPI threads.

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