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W4027SQ 4×4 Inch UL Listed Spring Hinge Square Corner
- Product Information
Base Steel
Polished Brass
Antique Bronze
W4027SQ 4"×4" Inch UL Listed Spring Hinge Square Corner
W4027SQ 4×4 inch spring hinge is UL listed three knuckle self-closing hinge, square corner, two-way adjustable tension with hex key or tension rod, steel or stainless steel base metal. Leaf thickness 2.7mm, designed for light weight residential automatic closing door. WINGTEC is reliable China Manufacture, China Factory and China Supplier for residential architectural hardware.
Product Specification
Technical Parameter
| Item | Parameter |
|---|---|
| Model | W4027SQ |
| Dimension | 4 inch × 4 inch |
| Overall Size (mm) | 101.6 × 101.6 mm |
| Leaf Thickness | 2.7 mm |
| Corner Style | Square Corner (SQ) |
| Adjustment Method | Hex Wrench / Tension Rod |
| Knuckle | Three Knuckle |
| Mount Pattern | Template hole pattern |
| Packing Qty Per Box | 1 Pc |
| Packing Qty Per Carton | 50 Pcs |
| Target Market | Residential Hardware Market |
Application Scenarios
Light Duty Residential Self-Closing Doors
W4027SQ 4x4 UL listed spring hinge is designed for light weight residential doors, automatically close door after opening. Two-way tension adjustment lets installer control closing speed easily.
Residential Hardware Wholesale
WINGTEC as China Manufacture, China Factory and China Supplier, supply bulk spring hinges for hardware importers & distributors. Factory direct price and stable UL certification.
Complete Series Sourcing
Full range spring hinges available: 3.5"x3.5",4"x4",4.5"x4",4.5"x4.5", Square Corner,1/4" Radius,5/8" Radius options. Support one-stop procurement.
Product Characteristics
4"×4" UL listed three knuckle spring hinge, square corner, automatic self-closing function for residential door
Steel or stainless steel base metal, 2.7mm leaf thickness, square corner, template hole pattern
Two adjustable tension methods: hex key or tension lever for flexible closing force tuning
China Manufacture & China Factory direct wholesale, multiple surface finishes available
Packed 1pc per box, 50 pcs per carton, matched with #10×1" Wood Screws and #10×1/2" Machine Screws
Warranty & Customization
Quality guarantee against manufacturing defects from our China factory.
Custom packaging, private label and customized finish service for bulk wholesale orders.
Full series spring hinges for combined container loading.
Frequently Asked Questions
What is W4027SQ spring hinge used for?
W4027SQ 4×4 Inch square corner spring hinge is UL listed self-closing hinge for light weight residential doors, two-way adjustable tension, 2.7mm leaf thickness, made by WINGTEC China Factory.
How do I adjust spring tension?
Two adjustment options: hex wrench or tension rod, adjust clockwise to increase closing tension, lock pin fixes tension after setup.
Are you China Manufacture / China Factory / China Supplier for spring hinges?
Yes, WINGTEC is professional China Manufacture, China Factory & China Supplier of UL spring hinges, full sizes and corner types available for bulk export.
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