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Waterson USA K51M-450-SB

Special Order Hold Open Adjustable Self Closing Hinge 4 1/2" x 4 1/2"

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Special Order non-stock item Requires 6 week lead time

SKU: K51M-450-SB

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This K51-450-SB is a Hold-Open hinge for use with 3 and 4 hinge Waterson Hinge packages. Replaces one hinge. Do not use multiple SB hinges on one door. Eliminate overhead door closers, save money and improve looks. Adjusts to meet ADA requirements with secure, quiet closing.

Because this is not a stock item we must order it specifically for you and we will be unable to accept a return unless the item is defective as determined by the factory it was bought from.

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US19 - Flat Black Coated US19 - Flat Black Coated


K51M-450-SB is a hold open add-in hinge for the Waterson line of self closing hinges. A typical 7’0 door utilizes three active Waterson Closer Hinges to create a perfect, self-closing system. Each hinge’s unique numerical panel allows the spring tensions to adjust precisely according to door weight and environmental conditions. 

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Product at A Glance

  • Hold open funtion self-closing hinge

  • For 4 x 7 doors 1-3/4"thick and up to 260 lbs.
  • Fully adjustable closing force and speed according to environment needs
  • Numerical adjustment panel on hinge end to set up precise tension
  • Mechanical only mechanism supporting heavy duty and fully exterior 
  • Aesthetically pleasing compared to door closers -- without extrusive arms
  • UL certified cycle testing ensures many years of low maintenance.
  • Corrosion resistant stainless steel. Patented designs do not leak oil.
  • Fits standard hinge templates for swinging doors and gates.
  • 3hr Fire Rated. UL listed for use on fire rated doors.

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Instructions & Templates

Click on the links below to download helpful instructions & templates for this product


Self-Closing Hinge Product Introduction-Waterson thumbnail

Self-Closing Hinge Product Introduction-Waterson

How to Adjust Waterson Mechanical Self-Closing Hinges thumbnail

How to Adjust Waterson Mechanical Self-Closing Hinges

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