Bulldog Insertion Plugs C1-50

KYA C1-50 is a round double-sided toothed timber connector designed for bolted wood-to-wood joints. Teeth on both sides of the steel plate engage the adjoining timber members when the connection is tightened or pressed together.

The C1-50 has a 50mm external diameter, 17mm center hole, 6mm tooth height, 13mm total height and 1.0mm material thickness. The 17mm center hole is suitable for connections using an approximately M16 bolt where that bolt size is specified by the timber-joint design.

KYA lists 200 connectors per box for the C1-50. Typical applications include bolted timber joints, half-lap joints, timber frames, beam connections, collar beams, purlins and other wood-to-wood structural assemblies.

C1-50 Timber Connector Specifications

How the C1-50 Toothed Timber Connector Works

The C1-50 is installed between two timber members. Its teeth face both wood surfaces, while the center hole aligns with the bolt or dowel hole in the joint.

As the joint is tightened or pressed together, the teeth penetrate both timber members. The connector then works together with the bolt, washers and timber to transfer forces across the joint.

The toothed connector increases the mechanical engagement around the bolted joint, but final joint capacity depends on the complete connection design, including timber properties, bolt size, washers, connector quantity, spacing and edge distances.

Key Features of the C1-50 Connector

Double-Sided Toothed Design

The C1 connector has teeth on both sides of the plate. This allows one connector to engage two adjoining timber members in a wood-to-wood connection.

50mm External Diameter

The C1-50 has a nominal 50mm outside diameter. Connector diameter is a critical selection parameter because it affects the toothed engagement area and the timber dimensions required around the connection.

17mm Center Hole

The 17mm center opening allows the connector to be positioned around the central fastener. It is commonly associated with approximately M16 bolt connections where that size is permitted by the joint design.

When replacing an existing timber connector, compare the center-hole diameter as well as the external diameter. A 50mm connector with a different center hole is not automatically equivalent.

6mm Tooth Height

KYA lists approximately 6mm tooth height for the C1-50. During assembly, the connector should be pressed evenly so the teeth enter both timber members without being bent or flattened.

13mm Total Height

The published total height is approximately 13mm. This dimension should be checked when comparing the C1-50 with another supplier's toothed plate connector.

1.0mm Steel Thickness

The C1-50 uses approximately 1.0mm sheet thickness. Similar external dimensions alone do not establish exact interchangeability if plate thickness, tooth geometry or material specification differs.

Galvanized Steel Surface

The current KYA product information identifies the C1-50 as a galvanized steel connector. If the project requires a specific galvanizing process, zinc coating thickness or corrosion class, include that requirement in the purchasing specification.

C1-50 Timber Connector Applications

Double-sided toothed connectors are primarily used in timber joints where two wood members are connected with a central bolt, dowel or another specified fastener.

• Bolted wood-to-wood connections

• Timber beam connections

• Half-lap joints

• Timber frame corners

• Collar-beam connections

• Coupling purlins

• Roof timber structures

• Heavy timber framing

• Solid timber assemblies

• Glued laminated timber joints where this connector type is specified

The C1-50 is a component of the complete timber joint rather than a stand-alone fastening system. Connector quantity, bolt diameter, washers and timber dimensions should follow the connection design.

Typical C1-50 Installation

The installation procedure depends on the timber-joint design, but a typical C1 double-sided connector assembly follows these steps.

1. Mark and drill the specified bolt or dowel hole through the timber members.

2. Position the C1-50 between the two wood surfaces with the teeth facing both timber members.

3. Align the 17mm center hole with the prepared bolt hole.

4. Install the specified bolt and suitable washers.

5. Tighten the joint or use a suitable press-in method so that the teeth enter both pieces of timber evenly.

6. Check that the connector is seated correctly and the timber members remain properly aligned.

Do not drive the connector into the timber by striking the teeth directly. Direct impact can bend the teeth, deform the plate or create uneven seating.

C1 Timber Connector Size Range

KYA lists several C1 connector sizes for different timber-joint requirements. Each size has its own external diameter, center hole, tooth height, total height, material thickness and package quantity.

C1-50 vs. C1-62 vs. C1-75

Connector diameter should follow the timber-joint specification. A larger toothed connector should not automatically replace the C1-50 simply because it provides a larger contact area.

C1-50 and M16 Bolt Connections

The C1-50 has a 17mm center hole. This dimension is commonly paired with an approximately M16 bolt in systems where the bolt-hole clearance and timber connection design permit that combination.

The bolt should not be selected from the connector hole diameter alone. Bolt grade, washer dimensions, timber thickness, spacing, edge distances and required joint capacity are separate design parameters.

Galvanized C1-50 Timber Connectors

The KYA source page identifies the featured product as steel with a galvanized finish. Galvanizing provides zinc-based corrosion protection compared with untreated steel.

The exact galvanizing process and coating thickness are not defined in the current product information. If a project requires hot-dip galvanizing, a particular zinc coating mass or an exterior corrosion class, confirm that requirement before purchase.

Do not transfer another manufacturer's coating specification or structural approval to the KYA C1-50 solely because the nominal dimensions are the same.

What to Check When Replacing Another 50×17mm Connector

Nominal dimensions alone do not prove structural equivalence between manufacturers. Material grade, tooth geometry, coating, manufacturing tolerances, approval documents and published design values may differ.

Ordering KYA C1-50 Toothed Timber Connectors

For accurate quotation and product matching, provide the required connector model, quantity, timber-joint application, bolt or dowel specification, surface-coating requirement, required technical documentation and delivery destination.

For the exact product shown on this page, specify C1-50 double-sided toothed timber connector, 50mm external diameter, 17mm center hole, 6mm tooth height, 13mm overall height and 1.0mm thickness.

Frequently Asked Questions About C1-50 Timber Connectors

What is a C1-50 toothed timber connector?

It is a round steel connector with teeth on both sides, designed to be positioned between two timber members in a bolted or dowelled wood-to-wood joint.

What are the dimensions of KYA C1-50?

The connector has a 50mm external diameter, 17mm center hole, 6mm tooth height, 13mm total height and 1.0mm material thickness.

Does C1-50 have teeth on both sides?

Yes. The C1 design uses teeth on both faces so that the connector can engage both timber members in the joint.

What bolt size is used with C1-50?

The connector has a 17mm center hole and is commonly associated with approximately M16 bolt connections. The final bolt specification must follow the timber-joint design.

How high are the teeth?

KYA lists the C1-50 tooth height at approximately 6mm.

How thick is the C1-50 plate?

The published steel thickness is approximately 1.0mm.

What is the total height of C1-50?

The current KYA size table lists a total height of 13mm.

What material is the C1-50 made from?

The current KYA product information identifies the connector as steel with a galvanized surface.

Is KYA C1-50 hot-dip galvanized?

The current product information states galvanized but does not define the exact galvanizing process for this SKU. Confirm hot-dip galvanizing or another specific coating requirement before ordering if it is required by the project.

What is the difference between C1-50 and C1-50G-B?

The current size table gives both versions the same 50mm external diameter, 17mm center hole, 6mm tooth height, 13mm overall height and 1.0mm thickness. Confirm the exact surface or specification distinction represented by the G suffix before ordering.

How many C1-50 connectors are packed in one box?

KYA currently lists 200 pieces per box for the C1-50.

What are C1-50 connectors used for?

Typical uses include bolted timber joints, timber frames, half-lap joints, beam connections, frame corners, collar beams and coupling purlins.

Can C1-50 be used with solid timber?

Yes, double-sided toothed connectors are commonly used in solid timber wood-to-wood joints where this connector type and size are specified.

Can C1-50 be used with glulam?

This type of toothed connector can be used in engineered timber connections where the joint design permits it. Confirm connector size, bolt arrangement and structural requirements for the specific glulam assembly.

How is the C1-50 installed?

Position the connector between the two timber members around the prepared bolt hole. The joint is then tightened or pressed so that the teeth engage both wood surfaces.

Can I hammer the C1-50 directly into the wood?

Direct impact on the teeth is not recommended because it can deform the connector. Use bolt tightening, a suitable press-in method or another installation method specified for the timber connection.

Does KYA publish a load rating for C1-50?

The current product information supplied for this page does not state an exact design load for KYA C1-50. Joint capacity depends on the complete timber connection, not the connector diameter alone.

Does KYA C1-50 have an EN 912 declaration?

No exact EN 912 compliance statement is provided in the current KYA product information for this SKU. If a standard, approval or declaration is required for a structural project, request the relevant documentation before purchase.

Can KYA C1-50 replace another 50×17mm toothed connector?

Matching the 50mm external diameter and 17mm center hole is only the first step. Also compare tooth height, overall height, plate thickness, material, coating, approvals and required joint capacity before substitution.

Should I choose C1-50, C1-62 or C1-75?

Use the connector size specified by the timber-joint design. The three sizes have different external diameters, center holes, tooth heights and material thicknesses and should not be treated as interchangeable.

What information should I provide when requesting a quotation?

Provide the required C1 model, quantity, timber-joint application, bolt or dowel size, required coating, any required technical documentation and delivery destination.