Commercial Stainless Steel Closer Hinge

Commercial self-closing hinges need to handle the daily rigors of frequent use. Waterson Stainless Steel Closer Hinges are designed to manage commercial closing demands while maintaining fluid and effective movement, particularly with obligatory fire rated doors. 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. Additionally, Waterson hinges meet all ADA codes concerning speed control, closing force, and door clearance.

Automatic fire door closers-K51M
  • 3hr Fire Rated
  • Commercial Grade
  • 304/ 316 Stainless Steel
  • Aesthetically pleasing
  • Fully Speed & Force Adjustable
  • ADA Compliant
  • ANSI A156.17 Grade One – UL Listed

Specify Waterson

Specification and Configuration

US STANDARD 

1. Specification

Hinge TypeDIM (H x W)BHMA#Door thicknessModel#GageOptions
Full Mortise4″ x 4″A40M1-3/8″K51M400

0.130″

STANDARD FINISHES
US32D-630-Satin Brushed

MATCHING FINISHES
USL1-631-Matte Black
US10B-640-Oil Rubbed Bronze
US15-619-Satin Brass
Custom

CORNERS
Square
1/4R radius
1/5R radius

4-1/2″ x 4-1/2″A45M1-3/4″K51M-450

0.134″

5″ x 5″A50M1-3/4″~2-1/2″K51M-500

0.146″

5″ x 5″A50B1-3/4″~2-1/2″K51M-500D

0.190″

6″ x 6″A60M1-3/4″~2-1/2″K51M-600

0.160″

Swing Clear4-1/2″ x 4-1/2″A45M51-3/4″K51L-SWRH-450

0.134″

5″ x 4-1/2″n/a1-3/4″K51L-SWRH-500

0.146″

2. Configuration

Door InfoModel Combo#
Full mortise 4.5*4.5
FEATURESClosing Type

 Mechanical Only – M
 Hydraulic Hybrid – H

Hinge Qty

Hinge Type

Finish
Self-closingFluid Motion

Door Range ≤ 120°

Hold-open

90°

1-3/4″
< 7’-0 x 4′-0≤ 260 lbs
K51M-450-A3M3 hinges/door (SA.SA.SA1)Stocking

US32D-630-Satin Brushed
Matching-USL1-631-Matte Black

Special Order

Matching-US10B-640-Oil Rubbed Bronze
Matching-US15-619-Satin Brass

K51M-450-B3

H

3 hinges/door (DS.HA.SA1)
K51M-450-C3M3 hinges/door (SB.SA.SA1)
K51M-450-D3H3 hinges/door (DS.HA.SB)
1-3/4″
< 8’-0 x 4′-0≤ 260 lbs
K51M-450-C4M4 hinges/door (SB.SA.SA.SA1)
K51M-450-D4H4 hinges/door (DS.HA.SB.SA1)
1-3/4″
< 8’-0 x 4′-0≤ 330 lbs
K51M-450-A4M4 hinges/door (DS,SA,SA,SA1)
K51M-450-B4H4 hinges/door (DS.HA.SA.SA1)
Door InfoModel Combo#
Full mortise 4*4
FEATURESClosing Type

 Mechanical Only – M
 Hydraulic Hybrid – H

Hinge Qty

Hinge Type

Finish
Self-closingFluid Motion

Door Range ≤ 120°

Hold-open

90°

1-3/8″
< 7’-0 x 4′-0
≤ 260 lbs
K51M-400-A3M3 hinges/door (SA.SA.SA1)Stocking

US32D-630-Satin Brushed
Matching-USL1-631-Matte Black

Special Order

Matching-US10B-640-Oil Rubbed Bronze
Matching-US15-619-Satin Brass

K51M-400-B3

H

3 hinges/door (DS.HA.SA1)
K51M-400-C3M3 hinges/door (SB.SA.SA1)
K51M-400-D3H3 hinges/door (DS.HA.SB)
1-3/8″
< 8’-0 x 4′-0
≤ 330 lbs
K51M-400-C4M4 hinges/door (SB.SA.SA.SA1)
K51M-400-D4H4 hinges/door (DS.HA.SB.SA1)
1-3/8″
< 8’-0 x 4′-0
≤ 330 lbs
K51M-400-A4M4 hinges/door (DS,SA,SA,SA1)
K51M-400-B4H4 hinges/door (DS.HA.SA.SA1)
Door InfoModel Combo#
Full mortise 5*5
FEATURESClosing Type

 Mechanical Only – M
 Hydraulic Hybrid – H

Hinge Qty

Hinge Type

Finish
Self-closingFluid Motion

Door Range ≤ 120°

Hold-open

90°

1-3/4″ ~ 2-1/4″
< 7’-0 x 4′-0
≤ 260 lbs
K51M-500D-A3M3 hinges/door (SA.SA.SA1)Stocking

US32D-630-Satin Brushed
Matching-USL1-631-Matte Black

Special Order

Matching-US10B-640-Oil Rubbed Bronze
Matching-US15-619-Satin Brass

K51M-500D-B3

H

3 hinges/door (DS.HA.SA1)
K51M-500D-C3M3 hinges/door (SB.SA.SA1)
K51M-500D-D3H3 hinges/door (DS.HA.SB)
1-3/4″ ~ 2-1/4″
< 8’-0 x 4′-0
≤ 330 lbs
K51M-500D-C4M4 hinges/door (SB.SA.SA.SA1)
K51M-500D-D4H4 hinges/door (DS.HA.SB.SA1)
1-3/4″ ~ 2-1/4″
< 8’-0 x 4′-0
≤ 330 lbs
K51M-500D-A4M4 hinges/door (DS,SA,SA,SA1)
K51M-500D-B4H4 hinges/door (DS.HA.SA.SA1)
Door InfoModel Combo#
Right handed
Swing clear4.5*4.5
FEATURESClosing Type

 Mechanical Only – M
 Hydraulic Hybrid – H

Hinge Qty

Hinge Type

Finish
Self-closingFluid Motion

Door Range ≤ 120°

Hold-open

90°

1-3/4″
< 7’-0 x 4′-0
≤ 260 lbs
K51L-SWRH-450-A3M3 hinges/door (SA.SA.SA1)Stocking

US32D-630-Satin Brushed
Matching-USL1-631-Matte Black

Special Order

Matching-US10B-640-Oil Rubbed Bronze
Matching-US15-619-Satin Brass

K51L-SWRH-450-B3

H

3 hinges/door (DS.HA.SA1)
K51L-SWRH-450-C3M3 hinges/door (SB.SA.SA1)
K51L-SWRH-450-D3H3 hinges/door (DS.HA.SB)
1-3/4″
< 8’-0 x 4′-0
≤ 330 lbs
K51L-SWRH-450-C4M4 hinges/door (SB.SA.SA.SA1)
K51L-SWRH-450-D4H4 hinges/door (DS.HA.SB.SA1)
1-3/4″
< 8’-0 x 4′-0
≤ 330 lbs
K51L-SWRH-450-A4M4 hinges/door (DS,SA,SA,SA1)
K51L-SWRH-450-B4H4 hinges/door (DS.HA.SA.SA1)

US STANDARD 

1. Specification

Hinge TypeDIM (H x W)BHMA#Door thicknessModel#GageOptions
Full Mortise4″ x 4″A40M1-3/8″K51M400

0.130″

STANDARD FINISHES
US32D-630-Satin BrushedMATCHING FINISHES
USL1-631-Matte Black
US10B-640-Oil Rubbed Bronze
US15-619-Satin Brass
CustomCORNERS
Square
1/4R radius
1/5R radius
4-1/2″ x 4-1/2″A45M1-3/4″K51M-450

0.134″

5″ x 5″A50M1-3/4″~2-1/2″K51M-500

0.146″

5″ x 5″A50B1-3/4″~2-1/2″K51M-500D

0.190″

6″ x 6″A60M1-3/4″~2-1/2″K51M-600

0.160″

Swing Clear4-1/2″ x 4-1/2″A45M51-3/4″K51L-SWRH-450

0.134″

5″ x 4-1/2″n/a1-3/4″K51L-SWRH-500

0.146″

2. Configuration

Door InfoModel Combo#
Full mortise 4.5*4.5
FEATURESClosing Type

 Mechanical Only – M
 Hydraulic Hybrid – H

Hinge Qty

Hinge Type

Finish
Self-closingFluid Motion

Door Range ≤ 120°

Hold-open

90°

1-3/4″
< 7’-0 x 4′-0≤ 260 lbs
K51M-450-A3M3 hinges/door (SA.SA.SA1)Stocking

US32D-630-Satin Brushed
Matching-USL1-631-Matte Black

Special Order

Matching-US10B-640-Oil Rubbed Bronze
Matching-US15-619-Satin Brass

K51M-450-B3

H

3 hinges/door (DS.HA.SA1)
K51M-450-C3M3 hinges/door (SB.SA.SA1)
K51M-450-D3H3 hinges/door (DS.HA.SB)
1-3/4″
< 8’-0 x 4′-0≤ 260 lbs
K51M-450-C4M4 hinges/door (SB.SA.SA.SA1)
K51M-450-D4H4 hinges/door (DS.HA.SB.SA1)
1-3/4″
< 8’-0 x 4′-0≤ 330 lbs
K51M-450-A4M4 hinges/door (DS,SA,SA,SA1)
K51M-450-B4H4 hinges/door (DS.HA.SA.SA1)
Door InfoModel Combo#
Full mortise 4*4
FEATURESClosing Type

 Mechanical Only – M
 Hydraulic Hybrid – H

Hinge Qty

Hinge Type

Finish
Self-closingFluid Motion

Door Range ≤ 120°

Hold-open

90°

1-3/8″
< 7’-0 x 4′-0
≤ 260 lbs
K51M-400-A3M3 hinges/door (SA.SA.SA1)Stocking

US32D-630-Satin Brushed
Matching-USL1-631-Matte Black

Special Order

Matching-US10B-640-Oil Rubbed Bronze
Matching-US15-619-Satin Brass

K51M-400-B3

H

3 hinges/door (DS.HA.SA1)
K51M-400-C3M3 hinges/door (SB.SA.SA1)
K51M-400-D3H3 hinges/door (DS.HA.SB)
1-3/8″
< 8’-0 x 4′-0
≤ 330 lbs
K51M-400-C4M4 hinges/door (SB.SA.SA.SA1)
K51M-400-D4H4 hinges/door (DS.HA.SB.SA1)
1-3/8″
< 8’-0 x 4′-0
≤ 330 lbs
K51M-400-A4M4 hinges/door (DS,SA,SA,SA1)
K51M-400-B4H4 hinges/door (DS.HA.SA.SA1)
Door InfoModel Combo#
Full mortise 5*5
FEATURESClosing Type

 Mechanical Only – M
 Hydraulic Hybrid – H

Hinge Qty

Hinge Type

Finish
Self-closingFluid Motion

Door Range ≤ 120°

Hold-open

90°

1-3/4″ ~ 2-1/4″
< 7’-0 x 4′-0
≤ 260 lbs
K51M-500D-A3M3 hinges/door (SA.SA.SA1)Stocking

US32D-630-Satin Brushed
Matching-USL1-631-Matte Black

Special Order

Matching-US10B-640-Oil Rubbed Bronze
Matching-US15-619-Satin Brass

K51M-500D-B3

H

3 hinges/door (DS.HA.SA1)
K51M-500D-C3M3 hinges/door (SB.SA.SA1)
K51M-500D-D3H3 hinges/door (DS.HA.SB)
1-3/4″ ~ 2-1/4″
< 8’-0 x 4′-0
≤ 330 lbs
K51M-500D-C4M4 hinges/door (SB.SA.SA.SA1)
K51M-500D-D4H4 hinges/door (DS.HA.SB.SA1)
1-3/4″ ~ 2-1/4″
< 8’-0 x 4′-0
≤ 330 lbs
K51M-500D-A4M4 hinges/door (DS,SA,SA,SA1)
K51M-500D-B4H4 hinges/door (DS.HA.SA.SA1)
Door InfoModel Combo#
Right handed
Swing clear4.5*4.5
FEATURESClosing Type

 Mechanical Only – M
 Hydraulic Hybrid – H

Hinge Qty

Hinge Type

Finish
Self-closingFluid Motion

Door Range ≤ 120°

Hold-open

90°

1-3/4″
< 7’-0 x 4′-0
≤ 260 lbs
K51L-SWRH-450-A3M3 hinges/door (SA.SA.SA1)Stocking

US32D-630-Satin Brushed
Matching-USL1-631-Matte Black

Special Order

Matching-US10B-640-Oil Rubbed Bronze
Matching-US15-619-Satin Brass

K51L-SWRH-450-B3

H

3 hinges/door (DS.HA.SA1)
K51L-SWRH-450-C3M3 hinges/door (SB.SA.SA1)
K51L-SWRH-450-D3H3 hinges/door (DS.HA.SB)
1-3/4″
< 8’-0 x 4′-0
≤ 330 lbs
K51L-SWRH-450-C4M4 hinges/door (SB.SA.SA.SA1)
K51L-SWRH-450-D4H4 hinges/door (DS.HA.SB.SA1)
1-3/4″
< 8’-0 x 4′-0
≤ 330 lbs
K51L-SWRH-450-A4M4 hinges/door (DS,SA,SA,SA1)
K51L-SWRH-450-B4H4 hinges/door (DS.HA.SA.SA1)

Specification

OTHER COUNTRIES

ModelDIMDoor ThicknessGaugeFinishDoor Spec
Self-closing Combination
Self-closing & Hold-open Combination
K51M-6406″ x 4″ (H*W)35-45 mm4.1 mmSatin Brushed

Polished

Golden

Black

≤ 70kg
<1800 x 1250 mm
 ( DS, HA ) = ( Top, Bottom)
( SA, SA1 ) =( Top, Bottom)
( SB, HS ) = ( Top, Bottom)
K51M-6456″ x 4.5″ (H*W)40-50 mm
K51M-6506″ x 5″ (H*W)45-55 mm≤ 120kg
<2200 x 1250 mm
( DS, HA, SA1 ) = (Top, Middle, Bottom)
( SA, SA, SA1 ) = (Top, Middle, Bottom)
 ( SB, SA, HS ) = (Top, Middle, Bottom)
( SB, SA, SA1 ) = (Top, Middle, Bottom)
K51M-6556″ x 5.5″ (H*W)50-60 mm
K51M-6606″ x 6″ (H*W)55-65 mm
Gate door-fire door closers
Interior doors-fire door closers
Metal frame door-fire door closers
Office metal frame door-fire door closers

Comparison With Door Closer

Waterson Self-closing hingeTraditional door closer
Position
On door and easy as regular hinges
On door and need to preserve installation space
Aesthetics
Elegant and minimized visual intrusion
Bulky and maximized visual intrusion
Opening
Effortless
Strenuous
Outdoor
Yes, High Weather resistance
Yes and easily broken
Fire resistanceYesYes
Durability
1 million cycle test passed
Mostly 20 thousand cycles depending on brands
CostHardware+ Installation+ Maintenance

Low total cost

Hardware+ Installation+ Maintenance

High total cost

Waterson Self Closing Hinge V.S. Door Closer

Catalog

US AREA
Non-US Area

Specification

US Area
Non-US Area

Templates

K51M

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