3.5-Inch Square Footprint
The catalogue lists a 3.5″ × 3.5″ footprint with a 2.5 mm leaf thickness. Ask for the required corner drawing when replacing an existing hinge.
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TDC Hardware · Bulk supply & OEM projects
Spring Hinges for Self-Closing Doors
Choose self-closing door hinges by size, corner profile and installation requirements. TDC supplies spring hinge ranges for hardware distributors, door manufacturers and project buyers, with model selection and OEM support.
Start with the hinge footprint and door preparation, then check the closing function, screw pattern and project documentation. Our catalogue includes 3.5-inch, 4-inch and 4.5-inch spring hinge sizes, with square, radius and combination-corner patterns in the model range.
3.5–4.5 incatalogued square-size footprints
5SPH catalogue series
OEM / ODMdrawing and sample collaboration
Footprint first
Choose a Spring Hinge by Door Preparation
Match the hinge footprint, leaf thickness and corner shape to the door and frame. The SPH size families and the SP model descriptions provide two useful ways to narrow the enquiry; quote the exact reference you need.
4-Inch Formats
Compare a 4″ × 4″ square footprint with the 4″ × 3″ rectangular family. The square series lists several thickness entries, so size alone does not identify a complete specification.
4.5-Inch Formats
Review 4.5″ × 4.5″ and 4.5″ × 4″ footprints for the specified door preparation. Confirm the fixing template and closing requirement with the order.
1/4-Inch Radius Patterns
The model descriptions identify several 4″ × 4″ patterns with 1/4″ radius corners. Compare the model-specific weight designation and template.
Radius & Combination Corners
SP4406 is described with 5/8″ radius corners. SP4407 combines a square corner side with a 5/8″ radius side for the corresponding door preparation.
Square-Corner Model
The model description identifies a 4.5″ × 4.5″ spring hinge with square corners. Use the model drawing to check thickness, holes and fasteners.
Compare the specification
Spring Hinge Sizes & Model Profiles
Use the footprint and thickness together when comparing the SPH catalogue families. Dimensions describe the hinge; the door weight, size and installation still need to be reviewed for the application.
Swipe to compare the complete table.
| Series | Nominal footprint | Listed leaf thickness |
|---|---|---|
| SPH3535 | 3.5″ × 3.5″ | 2.5 mm |
| SPH4040 | 4″ × 4″ | 2.5 / 2.7 / 3.3 mm |
| SPH4545 | 4.5″ × 4.5″ | 3.4 mm |
| SPH4030 | 4″ × 3″ | 2.7 mm |
| SPH4540 | 4.5″ × 4″ | 3.4 mm |
For the SP designations shown in the existing product range, corner shape is another important selection step.
Swipe to compare the complete table.
| Model | Nominal footprint | Corner profile | Catalogue designation |
|---|---|---|---|
| SP4400 | 4″ × 4″ | 1/4″ radius | Commercial weight · template |
| SP4402 | 4″ × 4″ | 1/4″ radius | Light-commercial weight · template |
| SP4404 | 4″ × 4″ | 1/4″ radius | Residential weight · template |
| SP4406 | 4″ × 4″ | 5/8″ radius | Residential weight · non-template |
| SP4407 | 4″ × 4″ | Square × 5/8″ radius | Residential weight · non-template |
| SP4500 | 4.5″ × 4.5″ | Square | Commercial weight · template |
Send the exact catalogue or SP reference with your enquiry. Confirm the final drawing, screw pattern and supplied accessories before ordering; similar dimensions can occur under different model designations.
Check the listed model
UL Listing Information for Project Buyers
TDC’s parent company, Pinghu Weiyang Xiangbao Hardware Co.,LTD, is identified in UL Product iQ under file R25856, in the Swinging Fire Door Closers category. The public record includes a 3-1/2″ spring-hinge entry.
For a fire-door specification, send the required listed model designation and project documentation so the offered hinge can be matched to the relevant record and installation requirements.
From footprint to function
Specify the Closing Function Before Ordering
- Measure the existing preparation. Record hinge height, open width, leaf thickness, corner profile and fixing holes. Include a photograph and drawing when matching an installed hinge.
- Describe the door assembly. Provide the door material, dimensions, weight and frame construction. These details help narrow the hinge and fixing specification.
- Define the closing behaviour. A spring hinge returns the door toward the closed position. If you require controlled closing speed or soft-close damping, describe that requirement separately.
- Agree the model and supplied parts. Confirm the spring arrangement, adjustment method, screws and tools for the selected model. Follow its installation instructions rather than a generic turn count.
For a general overview, read our guide to adjusting self-closing hinge tension. For the final setup, use the instructions supplied with your exact hinge.
Complete the hardware schedule
Coordinate Material, Finish & Door Hardware
Specify the Base Material
The SP model descriptions identify steel leaves and a steel barrel. If another material is needed, include the environment and material requirement in the enquiry.
Match a Physical Finish Sample
Discuss black, nickel, brass-tone or other project finishes against a reference sample. Finish colour, base material and corrosion requirements should be specified separately.
Keep the Hardware Schedule Consistent
Compare residential hinges and commercial hinges for the remaining doors. See specialty spring mechanisms for other hinge arrangements.
Different Finishes
| Finish Symbols | Description | Steel | Series Stainless | Brass/Bronze |
|---|---|---|---|---|
| US1B | Bright Japan | 601 | N/A | 601 |
| US1D | Matte black | N/A | N/A | N/A |
| US2C | Zinc plated, commercial | 602 | N/A | N/A |
| US2CD | Zinc plated, satin | 603 | N/A | N/A |
| US2D | Zinc dichromate, yellow | N/A | N/A | N/A |
| US2G | Zinc plated, Gov. spec | 603 | N/A | N/A |
| US2H | Hot dipped galvanized | N/A | N/A | N/A |
| US3 | Polished brass | 632 | N/A | 605 |
| US3/4 | Brass plated | N/A | N/A | N/A |
| US4 | Satin brass | 633 | N/A | 606 |
| US5 | Antique Brass Plated | 638 | N/A | 609 |
| US7 | Nickel oxidized and highlighted | 636 | N/A | 610 |
| US9 | Bright bronze | 637 | N/A | 611 |
| US9A | Bright bronze, no lacquer | N/A | N/A | N/A |
| US10 | Satin bronze | 639 | N/A | 612 |
| US10A | Antique bronze lacquered | 641 | N/A | 614 |
| US10B | Antique bronze, oiled | 640 | N/A | 613 |
| US11P | Antique bronze, black | 640 | N/A | 613 |
| US12P | Tuscany bronze lacquered | 716 | N/A | N/A |
| US14 | Bright nickel | 645 | N/A | 618 |
| US14A | Bright nickel, oxidized | N/A | N/A | N/A |
| US14B | Bright black nickel | N/A | N/A | N/A |
| US15 | Satin nickel | 646 | N/A | 619 |
| US15A | Satin, nickel, nickel oxidized | 647 | N/A | 620 |
| US17A | Black nickel dull | 648 | N/A | 621 |
| US19 | Matte black | N/A | N/A | N/A |
| US20 | Statuary bronze, light | 649 | N/A | 623 |
| US20A | Statuary bronze, dark | 650 | N/A | 624 |
| US26 | Polished chromium plated | 651 | N/A | 625 |
| US26D | Satin chromium plated | 652 | N/A | 626 |
| US32 | Stainless steel metal, bright | N/A | 629 | N/A |
| US32D | Stainless steel metal, satin | N/A | 630 | N/A |
| OC | Antique copper | N/A | N/A | N/A |
| USP | Prime coat, beige | 600 | N/A | 600 |
| GY | Grey enamel | N/A | N/A | N/A |
| LS | “Luma Sheen”(R) | 689 | N/A | 689 |
| L1 | “Luma Color”(R) black | 693 | N/A | 693 |
| L2 | “Luma Color”(R) dark bronze | 695 | N/A | 695 |
| L3 | “Luma Color”(R) medium bronze | 694 | N/A | 694 |
From drawing to supply
Spring Hinge Manufacturing & OEM Supply
TDC supports hinge projects through drawing review, sampling and production planning. Share the intended door preparation, target finish, quantity and packaging format so the quotation covers the specification you will actually order.
Discuss OEM and custom hinge development and the quality-control process. For project-specific checks, agree the required documents and inspection points with the quotation.
Answers for procurement and design
Spring Hinge FAQs
What does a spring hinge do?
A spring hinge uses a spring mechanism to return a door toward the closed position. Select the hinge against the door preparation and closing requirement, and confirm the setup for the supplied model.
Is a self-closing spring hinge the same as a soft-close hinge?
Self-closing describes a return action; soft-close describes damping or controlled deceleration. Specify any speed-control or damping requirement separately when discussing the hinge.
Which spring hinge dimensions should I provide?
Provide the hinge height, open width, leaf thickness, corner shape and hole layout, together with the door dimensions, weight and frame material. A drawing or photograph is useful for matching an existing installation.
How should I choose between square and radius corners?
Match the hinge corner profile to the prepared recess in the door and frame. Confirm whether both leaves use the same profile or a square-and-radius combination.
How do I specify a spring hinge for a fire-door project?
Send the required listed model designation and project documentation. The offered hinge and its installation requirements need to be matched to the relevant listing and door assembly.
Can TDC supply spring hinges for bulk or OEM orders?
Discuss the model or drawing, corner profile, finish, supplied screws or tools, order quantity and packaging. TDC can review standard product selection and custom project requirements with your enquiry.
Tell us the door specification
Request a Spring Hinge Quotation
Send the model reference or hinge drawing, footprint, thickness, corner profile, door dimensions and weight, required finish and order quantity. Add any listing or project-documentation requirement to the enquiry.
RESOURCES
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Keeping Your Doors and Hinges Strong Against Wildfires and Floods
Property owners often face severe weather challenges. Strong doors and heavy-duty door hinges play a critical role in protecting buildings. Selecting quality materials, reinforcing hardware, and scheduling routine inspections help maintain durability. Proactive care ensures these components continue to function even under extreme wildfire or flood conditions. -
How US Tariffs Are Shaping the Residential Hinges Market in 2025
US tariffs in 2025 have driven significant price hikes for residential hinges. Homeowners, contractors, and industry professionals now face supply chain disruptions and sourcing challenges. Immediate responses include shifting to local suppliers and adjusting project budgets.
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Comprehensive Guide on Types of Exterior Door Hinges
You may encounter several types of exterior door hinges, such as butt, ball bearing, and concealed options. Hinge selection depends on door thickness, height, and security requirements. The table below outlines typical hinge sizes and recommendations for an exterior door:
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Email: allen@tdc-hardware.com
Add: 12819 Telegraph Road Santa Fe Springs, CA 90670
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