Gate Hinges
Heavy Duty Stainless Steel with Self Closing

Waterson’s advanced adjustable heavy duty self closing gate hinges are engineered to provide seamless interior and exterior gate closing. Crafted from weldable stainless steel, these heavy duty gate hinges perform extremely well under harsh weather conditions.

Our ADA-compliant spring loaded gate hinges operate easily and effortlessly with less than 5lbs of opening force. Available in a variety of finishes, these heavy duty hinges are perfect for commercial and residential applications.

Features

Stainless steel self closing gate hinges
  • Minimizes rust and corrosion
  • Stainless steel gate hinge 304 (marine SS316 per order)
Stainless steel gate hinges-quality control
  • Up to 5-year warranty
  • Quality assured and traceable
Stainless steel gate hinges-protection cap
  • Oceanside 3-year field tested
  • ADA closing speed control
  • Weather cap extends product life
Stainless steel gate hinges-multiple leave support size
  • Multiple extender sizes available
  • Suitable for 2″, 3″ and 4″ steel square posts

Features

Stainless steel self closing gate hinges
  • Minimizes rust and corrosion
  • Stainless steel gate hinge 304 (marine SS316 per order)
Stainless steel gate hinges-quality control
  • Up to 5-year warranty
  • Quality assured and traceable
Stainless steel self closing gate hinges-protection cap
  • Oceanside 3-year field tested
  • ADA closing speed control
  • Weather cap extends product life
Stainless steel self closing gate hinges-multiple leave support size
  • Multiple extender sizes available
  • Suitable for 2″, 3″ and 4″ steel square posts

K51P

Full Surface Clamping Style

Gate hinge-mortise series
DRAWINGS

Outdoor gate hinge surface mounted on the metal gate square posts.

K51PS

Full Surface Screw-on Style

Gate hinge-full surface series
DRAWINGS

Outdoor gate hinge surface mounted on the metal gate square posts without back plate

K51MP

Butt Hinges Style

Gate hinge-mortise series
DRAWINGS

Outdoor gate hinge installed between metal gate square posts.

K51W,
no cap
K51WP, with cap

Side Mount Style

Gate hinge-mortise series
DRAWINGS

Outdoor gate hinge installed on uneven planes.

K51P

Full Surface Clamping Style

Outdoor gate hinge surface mounted on the metal gate square posts

Gate hinge-full surface series
DRAWINGS

K51PS

Full Surface Screw-on Style

Outdoor gate hinge surface mounted on the metal gate square posts without back plate

Gate hinge-full surface series
DRAWINGS

K51MP

Butt Hinges Style

Outdoor gate hinge installed between metal gate square posts.

Gate hinge-mortise series
DRAWINGS

K51W
K51WP

Side Mount Style

Outdoor gate hinge installed on uneven planes

Gate hinge-mortise series
DRAWINGS
self closing gate hinges

How to Order

Applications

self closing gate hinges

How to Order

Applications

Specification

DOWNLOAD
Hinge Type Gate Size Product SKU
 FEATURES
Door Range ≤ 120°		 Closing Type

 Mechanical Only – M
 Hydraulic Hybrid – H

 Hinge Qty

Hinge Type

 Finish
Self-closing Fluid Motion 90°Hold-open
Full Surface (with back plate) ≤ 150 lbs
< 6’-0 x 4′-0		 K51P-A2 ● M 2 hinges/gate (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
K51P-B2 ● ● H 2 hinges/gate (DS.HA)
≤ 260 lbs
< 7’-0 x 4′-0		 K51P-A3 ● M 3 hinges/gate (SA.SA.SA1)
K51P-B3 ● ● H 3 hinges/gate (DS.HA.SA)
K51P-C3 ● ● M 3 hinges/gate (SB.SA.SA1)
K51P-D3 ● ● ● H 3 hinges/gate (DS.HA.SB)
Full Surface (no back plate) ≤ 150 lbs
< 6’-0 x 4′-0		 K51PS-A2 ● M 2 hinges/gate (SA.SA1)
K51PS-B2 ● ● H 2 hinges/gate (DS.HA)
≤ 260 lbs
< 7’-0 x 4′-0		 K51PS-A3 ● M 3 hinges/gate (SA.SA.SA1)
K51PS-B3 ● ● H 3 hinges/gate (DS.HA.SA)
K51PS-C3 ● ● M 3 hinges/gate (SB.SA.SA1)
K51PS-D3 ● ● ● H 3 hinges/gate (DS.HA.SB)


1. We provide additional door stop ( door stop drawing for 90° or 120°) features for all models. Click here to request a quotation.
2. Learn more about Waterson hinge design (SA,SA1,SB,…)
3. Learn more about mechanical or hydraulic hybrid closing types, or watch video
4. Please contact us directly concerning doors over the above specifications.

DOWNLOAD
Hinge Type Gate Size Product SKU
 FEATURES
Door Range ≤ 120°		 Closing Type

 Mechanical Only – M
 Hydraulic Hybrid – H

 Hinge Qty

Hinge Type

 Finish
Self-closing Fluid Motion 90°Hold-open
Mid-Posts
(exterior)		 ≤ 150 lbs
< 6’-0 x 4′-0		 K51MP-A2 ● M 2 hinges/gate (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
K51MP-B2 ● ● H 2 hinges/gate (DS.HA)
≤ 260 lbs
< 7’-0 x 4′-0		 K51MP-A3 ● M 3 hinges/gate (SA.SA.SA1)
K51MP-B3 ● ● H 3 hinges/gate (DS.HA.SA)
K51MP-C3 ● ● M 3 hinges/gate (SB.SA.SA1)
K51MP-D3 ● ● ● H 3 hinges/gate (DS.HA.SB)


1. We provide additional door stop ( door stop drawing for 90° or 120°) features for all models. Click here to request a quotation.
2. Learn more about Waterson hinge design (SA,SA1,SB,…)
3. Learn more about mechanical or hydraulic hybrid closing types, or watch video
4. Please contact us directly concerning doors over the above specifications.

DOWNLOAD
Hinge Type Gate Size Product SKU
 FEATURES
Door Range ≤ 120°		 Closing Type

 Mechanical Only – M
 Hydraulic Hybrid – H

 Hinge Qty

Hinge Type

 Finish
Self-closing Fluid Motion 90°Hold-open
Mid-Posts
(interior)		 ≤ 150 lbs
< 6’-0 x 4′-0		 K51M-A2 ● M 2 hinges/gate (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-B2 ● ● H 2 hinges/gate (DS.HA)
≤ 260 lbs
< 7’-0 x 4′-0		 K51M-A3 ● M 3 hinges/gate (SA.SA.SA1)
K51M-B3 ● ● H 3 hinges/gate (DS.HA.SA1)
K51M-C3 ● ● M 3 hinges/gate (SB.SA.SA1)
K51M-D3 ● ● ● H 3 hinges/gate (DS.HA.SB)


1. We provide additional door stop ( door stop drawing for 90° or 120°) features for all models. Click here to request a quotation.
2. Learn more about Waterson hinge design (SA,SA1,SB,…)
3. Learn more about mechanical or hydraulic hybrid closing types, or watch video
4. Please contact us directly concerning doors over the above specifications.

DOWNLOAD
Hinge Type Gate Size Product SKU
 FEATURES
Door Range ≤ 120°		 Closing Type

 Mechanical Only – M
 Hydraulic Hybrid – H

 Hinge Qty

Hinge Type

 Finish
Self-closing Fluid Motion 90°Hold-open
Side Mount (without weather cap) ≤ 150 lbs
< 6’-0 x 4′-0		 K51W-A2 ● M 2 hinges/gate (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
K51W-B2 ● ● H 2 hinges/gate (HS.SA)
≤ 260 lbs
< 7’-0 x 4′-0		 K51W-A3 ● M 3 hinges/gate (SA.SA.SA1)
K51W-B3 ● ● H 3 hinges/gate (SA.HS.SA)
K51W-C3 ● ● M 3 hinges/gate (SB.SA.SA1)
K51W-D3 ● ● ● H 3 hinges/gate (SA.HS.SB)
Side Mount (with weather cap) ≤ 150 lbs
< 6’-0 x 4′-0		 K51WP-A2 ● M 2 hinges/gate (SA.SA1)
K51WP-B2 ● ● H 2 hinges/gate (HS.SA)
≤ 260 lbs
< 7’-0 x 4′-0		 K51WP-A3 ● M 3 hinges/gate (SA.SA.SA1)
K51WP-B3 ● ● H 3 hinges/gate (SA.HS.SA)
K51WP-C3 ● ● M 3 hinges/gate (SB.SA.SA1)
K51WP-D3 ● ● ● H 3 hinges/gate (SA.HS.SB)


1. We provide additional door stop ( door stop drawing for 110°) features for all models. Click here to request a quotation.
2. Learn more about Waterson hinge design (SA,SA1,SB,…)
3. Learn more about mechanical or hydraulic hybrid closing types, or watch video
4. Please contact us directly concerning doors over the above specifications.

Specification

Mid-Posts (interior)

Waterson-hinges-K51M

Mid-Posts (exterior)

Waterson-hinges-K51MP

Full Surface (exterior)

Waterson-hinges-K51P/PS

Side Mount (exterior)

Waterson-hinges-K51W/WP
Gate door hinge- K51P
Pool gate hinge - K51P
Outdoor gate hinge-K51MP
Gate hinge-K51MP
Gate door hinge- K51P
Pool gate hinge - K51P
Outdoor gate hinge-K51MP
Gate hinge-K51MP

Field Tested 3 Years

Waterson heavy-duty fence gate hinges have durably withstood the harsh seaside environment for three years with only minimal surface staining while maintaining perfect function — these spring-loaded hinges don’t need to add lubrication or readjustment.

Dolphin Beach Club in Florida, United States
Waterson gate hinge-at dolphin beach club - 3 years ago
3 years ago (2013/3/28)
Waterson pool gate hinge-3 years later
3 years later (2016/3/25)
Waterson gate hinge-at dolphin beach club-3 yeas ago
3 years ago（ 2013/3/28）
Waterson gate hinge-functioned as a new one-3 yeas later
3 years later（ 2016/3/25）

Field Tested 3 Years

Waterson heavy-duty fence gate hinges have durably withstood the harsh seaside environment for three years with only minimal surface staining while maintaining perfect function — these spring loaded hinges don’t need to add lubrication or readjustment.

Dolphin Beach Club in Florida, United States
Waterson spring-loaded hinges
3 years ago (2013/3/28)
Waterson spring-loaded hinges
3 years later (2016/3/25)
Waterson spring-loaded hinges
3 years ago（ 2013/3/28）
Waterson spring-loaded hinges
3 years later（ 2016/3/25）

K51P

DRAWINGS
Installation

K51MP

DRAWINGS
Installation

K51P

DRAWINGS
Installation

K51MP

DRAWINGS
Installation

Adjustment Videos：

1. How to change buffer activation angle for self closing hinge
2. How to adjust buffer feature for self closing hinge
3. How to adjust mechanical self closing hinge
4. How to setup hold open feature B
5. How to adjust mechanical buffer feature A
6. How to adjust mechanical buffer feature A1 (at 0-20 degree)
ADJUSTMENT GUIDE

Adjustment Videos：

1. How to change buffer activation angle for self closing hinge
2. How to adjust buffer feature for self closing hinge
3. How to adjust mechanical self closing hinge
4. How to setup hold open feature B
5. How to adjust mechanical buffer feature A
6. How to adjust mechanical buffer feature A1 (at 0-20 degree)
ADJUSTMENT GUIDE

Request for Quote