Waterson’s commercial 6 inch door hinges are durable and versatile, designed for high-traffic areas and fire-rated doors. Fully adjustable, these hinges provide precise control over closing speed and backcheck, ensuring smooth operation. Made from high-quality materials, the 6″ hinges are built to withstand frequent use and comply with ADA standards for speed control, closing force, and door clearance.
Function Model
✓ A:Purely Mechanical ✓ B:Hydraulic Hybrid ✓ C:Mechanical + Hold Open ✓ D:Hydraulic + Hold Open
Code Compliant
✓ ADA Compliant: Opening force < 5 lbs, closing speed > 5 seconds ✓ UL Listed:Meets NFPA 3 hrs fire-rated code ✓ ANSI/BHMA A156.17:Grade One, one million cycles test ✓ ANSI/BHMA A156.7:Standard hinge template
Waterson Mechanical vs. Hydraulic Self Closing Hinges
Each hinge has two distinct functions, one adjusted from the hinge top, and the other from the bottom. Choose either mechanical self-closing door hinges or hydraulic hybrid soft-close ones depending on your particular closing needs. For further information, check Waterson Mechanical vs Hydraulic Self Closing Hinges
Note: Waterson hinges are non-handed and can be inverted.
How to Select Waterson 6 Inch Self Closing Hinges
Every Waterson self-closing hinge has a part number that tells you exactly what you are ordering. Read it from left to right: material, hinge style, hinge size, function model and hinges per set, finish, then any options.
For example, K51M-600-A3-630 WP01 is a Type 304 stainless steel, full mortise hinge in 6″ x 6″, a purely mechanical set of 3 hinges, in satin stainless steel finish (630), with a 90° door stop.
Choose 6 inch hinges for thicker, heavier commercial doors of 2-1/4″ and up. They are built for large doors in high-traffic areas such as schools, hotels, stairwells, and government buildings. Learn more about what size door hinges you need and why 6 inch door hinges suit heavy doors.
Yes. The C and D models include a hold-open hinge (SB) that keeps the door open at around 90°. Once pushed past that point, the door self-closes normally. Read more about hold open door hinges.
What Doors Are Waterson 6 Inch Hinges Suitable For?
Waterson K51M-600 6 inch hinges are built for large, heavy commercial doors that demand reliable, long-term performance. Here are the most common applications:
Waterson 6 Inch Door Hinges are easily adjustable and re-adjustable simply with two Allen wrenches in just minutes. Follow our procedure to get the optimal closing experience.
Please note that Waterson offers a variety of product codes including K51M, K51SWRH, K51P, K51L, and K51GG, among others. However, the adjustment process remains consistent and is categorized based on codes A, B, C, and D. Below are the videos on how to adjust:
K51M-A3 (SA.SA.SA1)
K51M-B3 (DS.HA.SA)
K51M-C3 (SB.SA.SA1)
K51M-D3 (DS.HA.SB)
Choose either mechanical self-closing spring-loaded hinges or hydraulic hybrid soft-close ones depending on your particular closing needs.
Just a heads-up: Waterson self-closing hinges start at 4″x4″. If you’re in need of smaller self-closing hinges, we’d recommend checking out some other resources! Thank you!
