Heavy Duty Self-Closing Gate Spring Hinges offer superior speed control, adjustable power, and tension settings. These butt hinges with weather cap measure 4-1/2" x 4-1/2", have a weight capacity of 260 lbs., and are made of 304 Stainless Steel. They are available in Satin Stainless Steel and Flat Black finishes. There are mechanical or hydraulic hybrid closing types available, as well as an option for 90° hold-open.
Product Specifications:
- Heavy Duty Self-Closing Gate Spring Hinges / Gate Closers
- Size: 4-1/2" Inch x 4-1/2" Inch
- Butt hinges with weather cap
- Material: 304 Stainless Steel
- Door Thickness: 1-3/4" Inch
- Door Weight: Up to 260 lbs.
- Post Size: 4" Inch
- Hinge Type: Between square posts
- Approximate Door Size: 4' feet x 7' feet
- Door Range: ≤120°
- Finishes Available: Satin Stainless Steel, Flat Black
- Closing Types Available: Mechanical Only, Hydraulic Hybrid
*Mechanical Only are fully exterior
*Hydraulic Hybrid hinges have fluid motion and are for interior use only
- 90° hold-open available
- Fixing Method: Screw-On, only spot weld AFTER speed adjustment
- Fully adjustable closing force and speed according to environment needs
- Numerical adjustment panel on hinge end to set up precise tension
- Aesthetically pleasing compared to door closers -- without extrusive arms
- 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
- Technical Drawing
- 3 Pack
- To learn more about Waterson Hinges, see our in depth guide here
Model |
Mechanical Only -M Hydraulic Hybrid -H |
90° Hold Open |
Fluid Motion |
Hinge Type |
K51MP-450-A3 |
M - Exterior |
|
|
SA.SA.SA1 |
K51MP-450-B3 |
H - Interior |
|
● |
DS.HA.SA1 |
K51MP-450-C3 |
M - Exterior |
● |
|
SB.SA.SA1 |
K51MP-450-D3 |
H - Interior |
● |
● |
DS.HA.SB |
Mechanical Only Features:
- Applications: Hotel Rooms, 3Hr Fire-rated (A3 model only), Fully Exterior, Arch Top, Heavy Duty, Courtyard Style
- Mechanical only mechanism supporting heavy duty and fully exterior
- Hinge Combination: SA.SA.SA1 (A3), SB.SA.SA1(C3)
- UL certified cycle testing ensures many years of low maintenance
- ANSI A156.17 Grade 1 : one million cycle testing
- ANSI A156.7 Template Hinge : 4 ½ x 4 ½
Hydraulic Hybrid Features:
- Applications: Offices, Frameless Glass Door, French Style, Quiet area, Breezy environments
- Include both mechanical and hydraulic mechanism supporting quiet close needs
- Fluid motion
- Hinge Combination: DS.HA.SA1 (B3), DS.HA.SB (D3)
- Apply for door open ≤ 120° and environment temperature > 32°F (0°C)
- ANSI A156.7 Template Hinge : 4 ½ x 4 ½
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




