Custom Spade Terminal Wire Harness Manufacturer

Yihetai manufactures custom spade terminal wire harnesses and fork terminal cable assemblies for control panels, terminal blocks, grounding points, power distribution systems, industrial equipment, appliances and electrical cabinets.

A spade terminal, also known as a fork terminal or U-type terminal, is designed for screw-type electrical connections. Unlike a ring terminal, the open fork shape allows the wire to be installed or removed without completely removing the screw. This makes spade terminal cable assemblies useful in equipment that requires convenient assembly, inspection, maintenance or replacement.

Based on your drawing, sample or application requirements, Yihetai can customize wire gauge, cable length, fork width, screw size, terminal material, insulation type, wire color, labels, heat shrink tubing, protective sleeving and connector combinations.

What Makes Spade Terminal Wire Harnesses Different?

Spade terminal wire harnesses are designed for electrical connection points that use screws, studs or terminal blocks. The fork-shaped terminal can slide under a loosened screw, allowing faster installation and removal compared with a closed ring terminal.

This structure is especially useful when engineers need a secure screw connection but also want easier maintenance or replacement during product assembly or field service.

Typical connection points include:

Terminal blocks
Barrier strips
Control panels
Grounding screws
Chassis connection points
Power distribution blocks
Relay terminals
Witch terminals
Electrical cabinets
Industrial machine modules
Appliance internal wiring

For OEM manufacturers, a properly designed spade terminal wire harness can simplify assembly, reduce service time and improve wiring consistency.

Spade Terminal Size & Screw Connection Guide

Choosing the correct spade terminal size is important for a secure and stable screw-terminal connection. Spade terminals, also called fork terminals or U-shaped terminals, are designed to fit under screws, studs or terminal block clamps without fully removing the screw during installation.

This open-fork design makes spade terminal wire harnesses suitable for control panels, terminal blocks, power supplies, transformers, motors, grounding points and industrial equipment where wiring may need to be installed, removed or serviced more conveniently.

Yihetai can manufacture custom spade terminal wire harnesses according to your screw size, wire gauge, current requirement, insulation type and installation space.

Spade Terminal Size	Typical Use
M3 Spade Terminal	Small terminal blocks, PCB grounding, compact control modules
M4 Spade Terminal	Low-voltage power wiring, sensors, small equipment
M5 Spade Terminal	Power supplies, control cabinets, industrial wiring
M6 Spade Terminal	Motors, transformers, grounding wires, machinery
M8 Spade Terminal	Higher-current power connection and heavy-duty equipment
Custom Fork Size	Special screw terminals, terminal blocks or customer-specific equipment

Why Use Spade Terminals Instead of Ring Terminals?

Both spade terminals and ring terminals are used for screw or stud connections, but they are designed for different installation needs.

A ring terminal provides a fully closed connection around the screw or stud, which is suitable for applications requiring maximum mechanical security. A spade terminal has an open fork shape, allowing the wire to be installed or removed without completely removing the screw.

This makes spade terminal wire harnesses useful when equipment requires faster assembly, easier maintenance or frequent wiring changes.

Terminal Type	Connection Method	Best Used For
Spade Terminal	Open fork under screw	Terminal blocks, control panels, power supplies, transformers
Ring Terminal	Closed ring under screw or stud	Battery cables, grounding wires, secure power connections
Faston Terminal	Push-on quick disconnect	Switches, relays, motors, heaters, appliances

Spade terminal wire harnesses are especially suitable for screw-terminal wiring where convenient installation and maintenance are important.

Spade Terminal vs Ring Terminal vs Faston Terminal

Different terminal cable assemblies are selected for different connection methods. Spade terminals are used for screw-type connections where easier removal is required. Ring terminals are selected when the screw or bolt needs to pass through a closed terminal for stronger retention. Faston terminals are used for push-on quick-disconnect applications.

Yihetai can manufacture spade, ring, Faston, flag, piggyback and mixed-terminal wire harnesses according to your equipment design.

Terminal Type	Connection Method	Best For
Spade Terminal	Open fork under screw	Terminal blocks, control panels, grounding points, removable screw connections
Ring Terminal	Closed ring fixed by screw or bolt	Battery cables, chassis grounding, high-retention connections
Faston Terminal	Push-on quick disconnect	Switches, relays, thermostats, appliance modules
Flag Terminal	Right-angle quick connection	Narrow or limited installation spaces
Piggyback Terminal	Shared quick-connect point	Branch circuits or multiple connections

If your application needs frequent maintenance or easier wire replacement, spade terminals may be more convenient than ring terminals. If the connection must resist strong vibration or cannot loosen during operation, ring terminals may be a better choice. If the component uses blade tabs instead of screws, Faston terminals are normally selected.

Where Spade Terminal Wire Harnesses Are Used

Spade terminal wire harnesses are widely used in products that require screw-type electrical connections with easier installation and removal.

Control Panels

Spade terminal harnesses are used in control panels for terminal blocks, relays, switches, signal wiring, internal power wiring and grounding points. The fork shape allows technicians to connect or disconnect wires without fully removing the screw.

Industrial Equipment

Industrial machines often require durable internal wiring that can be inspected and serviced. Spade terminal cable assemblies are used for motors, sensors, power supplies, control modules, machine panels and equipment bonding connections.

Grounding Connections

Spade terminals are commonly used for grounding wires, chassis connection points and equipment bonding. They provide a screw-secured connection while allowing easier removal during inspection or maintenance.

Home Appliances

In household appliances, spade terminal wire harnesses can be used for internal power wiring, switches, motors, heaters, thermostats, fans, pumps and control modules.

Power Distribution Systems

Spade terminal cable assemblies are used in power distribution blocks, bus bars, terminal strips and electrical cabinets where stable screw connection and convenient wiring maintenance are required.

Automotive and Electronic Devices

Spade terminal harnesses can be used in low-voltage automotive auxiliary circuits, lighting systems, small control modules, device wiring and electronic equipment where removable screw-type connections are needed.

Custom Spade Terminal Harness Configurations

Yihetai can manufacture different spade terminal cable assembly structures according to your electrical design, installation method and application environment.

Configuration	Description	Common Use
Spade to Spade Wire Harness	Spade terminals on both ends	Terminal blocks, control panels, electrical cabinets
Spade to Ring Terminal Cable	One spade end and one ring terminal end	Grounding, chassis connection, equipment bonding
Spade to Connector Cable	Spade terminal with JST, Molex, TE, AMP or other connector	Control modules, sensors, electronic devices
Spade to Open-End Wire	One spade terminal with stripped or tinned wire end	Custom assembly or field wiring
Multi-Branch Spade Harness	Multiple spade terminals in one harness	Power distribution, control panels, appliance wiring
Insulated Spade Terminal Lead	Spade terminal with insulation sleeve	Safer handling and short-circuit protection
Non-Insulated Spade Terminal Lead	Bare terminal structure	Compact assembly or customer-specified design

Each harness can be customized with different wire colors, labels, heat shrink tubing, protective sleeving, cable ties, branch lengths, terminal insulation and packaging methods.

Send us your drawing, sample or specification for a fast quotation

Open Fork Design for Faster Installation

The main advantage of a spade terminal is its open-fork structure. During installation, the screw does not need to be completely removed. The terminal can slide under the loosened screw and then be tightened into position.

This design helps improve assembly efficiency and maintenance convenience in equipment where multiple wires are connected to terminal blocks or screw terminals.

Spade terminal wire harnesses are commonly used when:

Situation	Why Spade Terminal Helps
Frequent maintenance is required	Easier to remove and reinstall compared with closed ring terminals
Many wires are connected to terminal blocks	Faster assembly and replacement
Installation space is limited	The open fork can be inserted from the side
Control panels need organized wiring	Terminals can be labeled and routed clearly
Equipment requires field service	Technicians can replace wires more conveniently

For applications with strong vibration or high mechanical stress, our team can help review whether a locking fork terminal, ring terminal or additional protection is more suitable.

Terminal Fork Type, Insulation & Protection Options

Different screw-terminal applications require different fork shapes, insulation styles and protection methods. Yihetai can customize spade terminal wire harnesses according to your electrical safety, installation space and mechanical requirements.

For control panels, terminal blocks and power wiring, insulation protection and terminal size should be confirmed before production to avoid loose connection, short circuit risk or installation problems.

Manufacturing and Quality Control for Spade Terminal Wire Harnesses

Spade terminal cable assemblies require stable crimping and accurate fork terminal matching. A poor crimp, incorrect fork width or loose screw connection may cause high resistance, overheating, unstable power transmission or equipment failure.

Yihetai controls key production steps during manufacturing, including incoming material inspection, wire cutting, stripping, terminal crimping, assembly, bundling, electrical testing, appearance inspection, final inspection and packaging.

For spade terminal assemblies, crimping quality and terminal fit are especially important. Yihetai can perform inspection and testing according to product requirements, such as continuity testing, wire sequence testing, pull force testing, insulation resistance testing and withstand voltage testing.

Why Terminal Crimping Quality Matters

For a spade terminal wire harness, the crimping area is one of the most important quality control points. A weak crimp can lead to high resistance, loose contact, overheating or intermittent electrical failure.

Yihetai controls the crimping process by checking:

Terminal specification
Wire stripping length
Crimp height and width
Pulling force
Conductor position
Insulation support
Terminal appearance
Electrical continuity

Our production process includes incoming material inspection, wire cutting, terminal crimping, assembly, bundling, electrical testing, appearance inspection and final inspection before packaging.

This process helps ensure that each harness is not only assembled correctly but also electrically reliable for your final product.

Manufacturing Capability

As a experienced wiring harness factory, Yihetai produces spade terminal wire harnesses with advanced automation and skilled craftsmanship. Our facility handles prototypes to high-volume runs, using precision crimping machines for consistent fork terminal quality. From wire stripping to final bundling, we integrate spade terminals seamlessly into custom cable assemblies.

From material selection to final assembly, all processes are completed in-house, ensuring better cost control, consistent quality, and faster delivery.

Typical lead time for prototypes is 5-7 days, and mass production can be completed within 3-4 weeks, depending on order quantity.

Why Choose Yihetai

25+ years of wire harness and cable assembly experience across multiple industries and applications

Strong engineering team for custom design and connector matching based on drawings, samples and application needs

Flexible manufacturing for prototype to mass production, suitable for both OEM development and stable supply programs

In-house process control and testing capability for better consistency, traceability and quality assurance

Certified quality system with ISO 9001:2015, UL and IATF 16949 support

Responsive custom service from a reliable China wire harness manufacturer and cable assembly supplier focused on long-term cooperation

How to Specify Your Custom Spade Terminal Wire Harness

Follow these steps to help us quote your custom spade terminal wire harness accurately.

Step 1: Confirm Spade Terminal Size
Choose the correct fork terminal size according to your screw, stud or terminal block. Common options include M3, M4, M5, M6, M8 or custom fork size.

Step 2: Select Fork Type & Insulation
Confirm the fork shape and insulation style, such as standard fork, narrow fork, wide fork, locking fork, non-insulated, PVC insulated, nylon insulated or heat shrink insulated.

Step 3: Define Electrical Requirement
Provide the wire gauge or working current requirement. Terminal material can be copper, brass, tin-plated copper or customer-specified material.

Step 4: Confirm Cable Structure
Share the cable length, cable material and opposite-end termination. Options include open end, spade terminal, ring terminal, Faston terminal, connector or custom termination.

Step 5: Add Protection & Marking
Let us know if you need heat shrink tube, sleeve, tape wrapping, color marking, cable label, polarity label or terminal number label.

Step 6: Share Application & Files
Tell us the application, quantity and available files. Useful files include drawing, sample photo, BOM list, terminal datasheet or terminal block photo.

Engineering Review & Quotation
Not sure which spade terminal size or structure you need? Send us your screw size, terminal block photo, existing cable sample or equipment connection point. Our team can help confirm the suitable fork terminal, wire gauge and cable assembly structure before quotation.

Frequently Asked Questions

Can you customize the Spade terminal wire harness based on our drawing or sample?

Yes. We can manufacture according to customer drawings, physical samples, BOM lists or technical requirements, and we can help review the design for manufacturability.

What spade terminal types and sizes can you produce?

We can produce male and female spade terminals, insulated and non-insulated types, flag terminals, piggyback terminals and other similar terminal styles in common sizes such as 2.8 mm, 4.8 mm and 6.3 mm.

Can you make one side with a spade terminal and the other side with a connector?

Yes. We can build mixed-end assemblies with spade terminals on one side and connectors, ring terminals, ferrules, tinned wire ends or other custom terminations on the other side.

Do you support low-volume orders and sample development?

Yes. We support prototype development, sample making and low-to-high volume production depending on the project stage and customer requirements.

What industries commonly use Spade Terminal Wire Harness assemblies?

These harnesses are commonly used in industrial controls, home appliances, HVAC systems, automotive electronics, LED systems, energy equipment, medical support devices and other electrical assemblies requiring quick terminal connection.

What is the difference between a spade terminal and a ring terminal?

A spade terminal has an open fork shape, which allows it to be installed or removed without completely removing the screw. A ring terminal has a closed circular shape and usually provides stronger retention, but it requires the screw to be fully removed during installation.

Looking for a reliable spade terminal wire harness manufacturer?

Send us your drawing, sample or technical requirements, and our team will provide a customized wire harness or cable assembly solution for your project.