4pcs Hydraulic Hinges Heavy Duty | Hold Open | 4.5x4.5 | 8ft | 260 lbs | 1 ¾” Thick | SS304 | K51M-450-D4

Hydraulic door hinges use a dual mechanism—spring tension for controlled self closing and hydraulic damping for soft closing—to handle large commercial doors up to 260 lbs.

This configuration delivers soft-close motion and 90° hold-open position for 8ft tall door in high-traffic applications. No extra hardware needed. 3 years warranty

Attention: This model is non-refundable

• DESCRIPTION
• DETAILS
• SPECIFICATIONS
• VIDEO

• Applications

  • Offices 
  • Interior & Exterior
  • Frameless Glass Door
  • French Style 
  • Quiet area
  • Breezy environments
  • 8ft Door

  Product Description and Features

  • Apply for door open ≤ 120° 
  • Fully adjustable closing force and speed according to environment needs
  • Numerical adjustment panel on hinge end to set up precise tension
  • Include both mechanical and hydraulic mechanism supporting quiet close needs
  • Aesthetically pleasing compared to door closers -- without obtrusive arm
  • Hold-open feature to keep door stay open at 90°

• Installation Kits  

  • Both machined #12-24 UNC ½”L and wooden tapping #12 x 1 ¼” screws included -- eight (8) of each type per hinge. Pack contains five (5) spares as well.
  • Three steel adhesive shims for gap adjustment between door and frame as needed
  • Tension Crook: Keeps hinge open during installation  
  • 5mm & 3mm hex allen wrenches  

  Compliance Standards

  • ANSI A156.17 Grade 1: one million cycle testing
  • ANSI A156.7 Template Hinge : 4.5” x 4.5”
  • CSI Spec 08 7100 Door Hardware & 08 7808 Self-closing Hinges  
  • ADA Force : opening force no more than 5 lbs
  • ADA Closing Speed: at least 5 sec to move from m 90° to 12°
  • ADA Vertical Clearance: Does not intrude into the doorway as do some overhead closers

• Specifications

  Product SKU	K51M-450-D4
  Hinge Type	Full Mortise, 4 1/2Inch x 4 1/2Inch
  Hinge Material	Stainless Steel
  Door Weight	From 40lbs to 260lbs
  Approx Door Size	1150mm W x 2200mm H (4ft x 8ft)
  Door Thickness	1 ¾” (40-50 mm)
  Self-closing	o
  Fluid Motion	o
  Hold-open	o
  Fixing Method	Screw-On, only spot weld AFTER speed adjustment
  Color/Finish	Satin Brushed,Black,Gold,ORB
  Combination/Quantity	DS.SA.HA.SB, 4 Pack

  
  
  

• Product Video