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4 Pack

4 Pack


Waterson USA K51M-450-A4

4 Pack Adjustable Self Closing Hinge 4-1/2" x 4-1/2"

Price: $426.00 /each

SKU: K51M-450-A4

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Self-Closing Stainless steel hinge set, fully adjustable Grade 1. Replaces both hinges and overhead door closers in one small package.

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Price: $426.00

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US32D - Satin Stainless Steel US32D - Satin Stainless Steel
US19 - Flat Black Coated US19 - Flat Black Coated


K51M-450-A4 are designed to manage commercial closing demands while maintaining fluid and effective movement, particularly with obligatory fire rated doors. A typical 8'0 door utilizes four 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

  • ANSI A156.17 Grade 1 : one million cycle testing 
  • Door Weight Up to 330lbs 
  • Door Thickness 1 ¾”.
  • 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.
  • 3Hr Fire-rated.



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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