Commercial 6 Inch Door Hinges
Stainless Steel Self Closing

6 inch hinges

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.

HOW TO ORDER

Most Frequently Asked Questions

Speed control, low opening force, weather resistance, hold open, heavy-duty, and more. Learn about our 7 innovative features.

Waterson Commercial 6 Inch Hinges Type Table

Each 6 inch heavy duty hinge has two distinct functions, one adjusted from the hinge top, and the other from the bottom. Note: Waterson hinges are non-handed and can be inverted.

Hinge TYPE MECHANISM FUNCTIONS
DS Top: Spring Power
Bottom: Spring Power
Dual door closing force
SA1 Top: Spring Power
Bottom: Mechanical Friction
Door closing force & latch speed control 
SA Top: Spring Power
Bottom: Mechanical Friction
Door closing force & swing speed control 
SB Top: Spring Power
Bottom: Hold-open Feature
Door closing force & hold the door at 85°+/-5°
HA Top: Hydraulic Damping
Bottom: Mechanical Friction
Both swing & latch speed control depends on settings
HS Top: Hydraulic Damping
Bottom: Spring Power
Door closing force & both swing & latch speed control depends on settings
waterson hinge mechanical vs hydraulic
Door Size Product SKU
Full mortise 6*6
FEATURES
Door Range ≤ 120°
Closing Type

 Mechanical Only – M
 Hydraulic Hybrid – H

Hinge Qty

Hinge Type

Finish
Self-closing Fluid Motion 90°Hold-open
1-3/4″ ~ 2-1/4″
< 7’-0 x 4′-0
≤ 260 lbs
K51M-600-A3 M 3 hinges/door (SA.SA.SA1) In Stock

  • 630(US32D)-Satin Brushed
  • 631(US19)-Flat Black-Powder Coating

Special Order

  • 695-Dark Satin Bronze-Powder coating
  • 731(US4)-Satin Brass-Physical vapor deposition
  • 612(US10)-Satin Bronze-Physical vapor deposition
  • White
  • Custom order 
K51M-600-B3 H 3 hinges/door (DS.HA.SA1)
K51M-600-C3 M 3 hinges/door (SB.SA.SA1)
K51M-600-D3 H 3 hinges/door (DS.HA.SB)
1-3/4″ ~ 2-1/4″
< 8’-0 x 4′-0
≤ 260 lbs
K51M-600-C4 M 4 hinges/door (SA.SB.SA.SA1) Other Options
K51M-600-D4 H 4 hinges/door (DS.SB.HA.SA1)
  • WP01: 90° door stop
  • WP02: 120° door stop
  • 316: Stainless steel
  • R14: 1/4″ Radius Corners
  • R58: 5/8″ Radius Corners
1-3/4″ ~ 2-1/4″
< 8’-0 x 4′-0
≤ 330 lbs
K51M-600-A4 M 4 hinges/door (DS,SA,SA,SA1)
K51M-600-B4 H 4 hinges/door (DS.SA.HA.SA1)

Please contact us directly concerning doors over the above specifications.

  • We provide additional door stop ( at 90° or 120°) features for all models.
  • Door Stop Options: A) two hinge set requires one door stop; B) three-four hinge set requires two door stops. Click here to see the drawing.
DOWNLOAD Table here
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Various businesses, including hotels, schools, and retail stores, choose Waterson self-closing door hinges for durability, design, and sustainability.

BIM Group

BIM Group Vietnam

A large-scale project requiring reliable, convenient, and durable spring hinges.

✓ Hydraulic mechanism
✓ Durable, extreme conditions
✓ Adjustable closing force

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palm house hotel

Palm House Hotel

84 doors in the hotel are equipped with our heavy-duty self-closing hinges.

✓ ADA compliant
✓ Low maintenance
✓ 3-hour fire resistance

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moreno elementary school

Moreno Elementary School

A solution for low-headroom doors and an upgrade from protruding closer arms.

✓ Corrosion-free
✓ high strength
✓ Ensure safety

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the US Embassy Abidjan

U.S. Embassy, Ivory Coast

Repeated trust in Waterson self-closing hinges for demanding environments

✓ ADA certified
✓ High strength
✓ Hydraulic mechanism

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Catalog

US AREA 
Full Mortise Inch Hinge Catalog – Waterson Stainless Steel Self-closing Hinge – For Commercial Door – US AREA Download
NON-US AREA
Full Mortise 6 Inch Hinge Catalog – Waterson Stainless Steel Self-closing Hinge For Commercial Door – NON-US AREA Download

Technical Drawing for 6″ x 6″

US AREA
Full Mortise Self-closing Hinge – Stainless Steel – Commercial Grade – 6″ x 6″ – (K51M-600) PDF DWG X_T

Code Compliance

ANSI/BHMA A156.7 Full Mortise Template
ANSI/BHMA A 156.17 Grade 1 Single Acting Hinge
ANSI/ICC A117.1 ADA Accessibility
UL Listed for ANSI/UL 10B and UL 10C, CAN/ULC S104 up to 3 hours
NFPA 80 National Fire Protection – Fire Door Assembly
NEPA101 National Fire Protection – Self Closing Device
ANSI/BHMA A 156.18 Finishes

Specify Waterson

Available for Download
How to Specify Download
Data Sheet Download
Warranty Download
Guide Spec Download
UL Report Download
SGS Report Download
BSD Spec Link Click Here

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.

Installation Guide Click Here
Set A3 ( SA.SA.SA1 ) – Waterson self-closing hinge adjustment manual Download
Set B3 ( DS.HA.SA1 ) – Waterson self-closing hinge adjustment manual Download
Set C3 ( SB.SA.SA1 ) – Waterson self-closing hinge adjustment manual Download
Set D3 ( DS.HA.SB ) – Waterson self-closing hinge adjustment manual Download
Set A4 ( DS.SA.SA.SA1 ) – Waterson self-closing hinge adjustment manual Download
Set B4 ( DS.HA.SA.SA1 ) – Waterson self-closing hinge adjustment manual Download
Set C4 ( SB.SA.SA1.SA1 ) – Waterson self-closing hinge adjustment manual Download
Set D4 ( DS.SB.HA.SA1 ) – Waterson self-closing hinge adjustment manual Download

How to Adjust

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.SA1)

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.

Accessibility Icon Code Compliant

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