Skip to content
stainless steel self closing gate hinges
hydraulic gate hinges
gate hinge cap closeup detail
gate hinge tension adjustment panel
gate hinge tension panel closeup
Waterson door hinge spring self-closing swing speed control satin antique detail
Waterson door hinge spring self-closing latch speed control satin antique detail
2pcs Wood Gate Hinges Heavy Duty | Self Closing | Soft Closing | Weldable | 5x4 | 6ft | 150 lbs | 1-4” Thick | SS304 | K51P-A2/B2
2pcs Wood Gate Hinges Heavy Duty | Self Closing | Soft Closing | Weldable | 5x4 | 6ft | 150 lbs | 1-4” Thick | SS304 | K51P-A2/B2
Waterson gate hinge installation template
Waterson residential door hinge barrel size guide
pool gate hinge gap size guide
self closing gate hinge beach side application
self closing pool gate hinge poolside
2pcs Wood Gate Hinges Heavy Duty | Self Closing | Soft Closing | Weldable | 5x4 | 6ft | 150 lbs | 1-4” Thick | SS304 | K51P-A2/B2
2pcs Wood Gate Hinges Heavy Duty | Self Closing | Soft Closing | Weldable | 5x4 | 6ft | 150 lbs | 1-4” Thick | SS304 | K51P-A2/B2
stainless steel self closing gate hinges
hydraulic gate hinges
gate hinge cap closeup detail
gate hinge tension adjustment panel
gate hinge tension panel closeup
Waterson door hinge spring self-closing swing speed control satin antique detail
Waterson door hinge spring self-closing latch speed control satin antique detail
Waterson gate hinge installation template
Waterson residential door hinge barrel size guide
pool gate hinge gap size guide
self closing gate hinge beach side application
self closing pool gate hinge poolside
Waterson self closing gate closer hinge

2pcs Wood Gate Hinges Heavy Duty | Self Closing | Soft Closing | Weldable | 5x4 | 6ft | 150 lbs | 1-4” Thick | SS304 | K51P-A2/B2

$353.00 - $432.00
$353.00
$353.00 - $432.00
$353.00
Closing Types: Self Closing (A2)
Color: Flat Black-US19
stainless steel: SS304

gatMaterial: Stainless Steel 304

  • Product Dimensions: 5"H × 4"W
  • Mounting Type: Door Mount – Full Mortise
  • Door Size: 910mm W x 1830mm H (3ft x 6ft)
  • Door Weight: Min 40 lbs - Max 260 lbs
  • Door Thickness:  1” - 4”
  • Unit: 2 pieces
  • Warranty: 3 years

TALK TO SALES FIRST - NON REFUNDABLE

  • FEATURES
  • APPLICATIONS
  • DETAILS
  • SPECIFICATIONS
  • ADJUSTMENT

  • Product Description and Features

    • Fully adjustable closing force and speed according to environment needs
    • Numerical adjustment panel on hinge end to set up precise tension
    • Hydraulic fluid mechanism supporting precise speed and closing force adjustment
    • Aesthetically pleasing compared to door closers -- without extrusive arms 
    • UL-certified cycle testing ensures many years of low maintenance.

  • Applications

    • Driveway wood gate hinges
    • Backyard wood gate hinges
    • Community wood pool gate hinges
    • Residential wood pool safety gate hinges
    • Garden wood gate hinges
    • Courtyard wood gate hinges
    • Marina wood gate hinges
    • High-wind area wood gate hinges
    • Durability
    • Heavy duty
    • Exterior use 
    • Standard screw pattern

  • 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  

  • Specifications

    Compliance Standards

    • ANSI A156.17 Grade 1 : one million cycle testing  
    • ANSI A156.7 Template Hinge : 6” x 6”
    • 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

     

  • Adjustment Video

    Check the Full Adjustment Guidance here:
    English Version     
    Spanish Version 
stainless steel self closing gate hinges 2pcs Stainless Steel Self Closing Gate Hinges | Mechanical | Weldable | 6ft | 150 lbs | 1” to 4” Thick | SS304 | K51P-A2
$353.00
stainless steel marine hinges 2pcs Stainless Steel Marine Hinges | Mechanical | Weldable | 6ft | 150 lbs | 1” to 4” Thick | SS316 | K51P-A2-316
$391.00
hydraulic gate hinges 2pcs Gate Hinges Soft Closing | Hydraulic | Weldable | 6ft | 150 lbs | 1” to 4” Thick | SS304 | K51P-B2
$394.00
Key Difference Self Closing, Stainless Steel 304 Self Closing, Stainless Steel 316 Marine Grade Soft Closing, Stainless Steel 304
Qty of Hinge 2 hinges/gate (SA.SA1) 2 hinges/gate (SA.SA1) 2 hinges/gate (DS.HA)
Dimension Door Weight ≤ 150 lbs; Door WxH: < 6ft x 3ft Door Weight ≤ 150 lbs; Door WxH: < 6ft x 3ft Door Weight ≤ 150 lbs; Door WxH: < 6ft x 3ft
Self Closing o o o
Fluid Motion x x o
Hold Open x x x

FAQ

Do I need to prepare anything before installing Waterson hinges?

Waterson hinges are built for hassle-free installation, but we still suggest reading through our installation guide beforehand. You can find it on our Installation page.

How can I adjust the tension?

Our hinges feature a clearly marked tension panel for quick and simple adjustments. For full guidance, please refer to the Adjustment page.

What’s included in the warranty?

The warranty covers any material or manufacturing defects. It doesn’t apply to issues caused by shipping, impact, improper storage, or misuse. For full terms, visit our Warranty page.

How do I get a quote for bulk orders?

Just leave your request on our Request Quotation page, and our team will reach out within 12 hours. Need help right away? Give us a call.

Where are products shipped from?

Most of our orders ship from warehouses in Michigan and California.
For urgent or high-volume orders, we may also ship directly from our Taiwan headquarters. FedEx or UPS handles most deliveries (1–5 business days), while large-volume orders go by ocean freight (30–60 days).

What’s the delivery time?

Once your payment is confirmed, shipping usually takes 3–5 business days, depending on your region.

How is the shipping fee calculated?

Shipping costs depend on domestic courier rates and the weight of your package. Since we ship within the U.S., charges are typically standard.

How do I track my shipment?

We’ll send a confirmation email with a tracking number after your order ships. You can use this number to follow the delivery progress.

 

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare