Zinc-Plated Steel 120° Countersunk Open-End Blind Rivets

Zinc-Plated Steel 120° Countersunk Open-End Blind Rivets

Product Overview

JUXIN FASTENERS supplies zinc-plated steel open-end blind rivets with 120° countersunk heads for industrial fastening applications requiring one-sided installation and reduced fastener head projection.

These rivets feature a steel body and steel pull mandrel. During installation, the mandrel is pulled through the rivet body to form a retaining portion on the inaccessible side of the assembly.

The 120° countersunk head is designed to seat within a matching countersink. When the hole geometry and installation conditions are correct, the head can sit approximately flush with the accessible panel surface.

This product is intended for compatible sheet-metal fabrication, industrial equipment enclosures and OEM assemblies where head clearance, mounting-hole geometry and reliable installation are important.

Material and Product Construction

The exact steel grades, coating thickness and surface treatment details must be confirmed from the original product specification.

Product Features

• Steel rivet body with steel pull mandrel

• 120° countersunk head geometry

• Open-end break-mandrel construction

• Flush or reduced-projection head installation in a compatible countersink

• One-sided fastening without rear-side tool access

• Zinc-plated finish

• Suitable for compatible sheet-metal and fabricated metal assemblies

• OEM drawing-based dimensional requirements subject to technical review

Dimensions and Technical Specifications

Technical Documentation: Refer to the existing JUXIN product PDF/CAD specification, pages 97–98.

The approved engineering drawings and dimensional tables govern the actual available sizes, tolerances and mechanical performance requirements.

120° Countersunk Head — Flush-Mount Design

The 120° countersunk head is the primary geometric feature of this product.

Unlike a standard dome head blind rivet, which protrudes above the panel surface, a countersunk blind rivet is designed to seat inside a prepared recess.

This configuration may be selected when an assembly requires:

• Reduced fastener head projection

• Clearance for adjacent components

• A relatively smooth accessible panel surface

• Compatibility with a specified countersunk mounting-hole design

Correct installation depends on the relationship between the rivet head and the countersink.

Critical dimensions include:

• Countersink included angle

• Countersink diameter

• Countersink depth

• Rivet head diameter and height

• Mounting-hole diameter

• Panel thickness and material properties

The countersink must be compatible with the rivet's 120° head geometry.

A different countersink angle may prevent proper seating or produce an unsuitable bearing interface.

Flush installation should be verified using the actual rivet and panel configuration.

Countersunk vs. Dome Head Steel Blind Rivets

The two head styles should not be considered interchangeable without reviewing the mounting-hole geometry and installed joint requirements.

Countersink Design and Thin Sheet-Metal Limitations

Countersinking removes or displaces material around the mounting hole.

For relatively thin panels, this may reduce the material available to support the rivet head.

The design engineer should consider:

• Original panel thickness

• Required countersink depth

• Remaining panel material

• Local bearing pressure

• Panel stiffness

• Rivet spacing and edge distance

• Expected joint loading

A flush-mounted head is not automatically the best choice for every thin-sheet application.

Where the panel cannot provide adequate support for the countersunk head, an alternative head style or a revised joint design may be necessary.

Grip Range and Material Stack-Up

Grip range describes the combined material thickness that a selected blind rivet is designed to fasten.

For a reliable joint, the total thickness of the assembled components must fall within the specified grip range.

Rivet body length and grip range are different parameters.

The selection process should account for:

• Minimum material stack-up

• Maximum material stack-up

• Rivet body diameter

• Rivet body length

• Countersink geometry

• Mounting-hole diameter

• Blind-side clearance

• Required mechanical performance

This product is identified as a standard open-end countersunk blind rivet. It should not be classified as a multi-grip rivet without supporting product documentation.

Engineering Selection Example

Consider an OEM equipment panel requiring a flush-mounted blind rivet.

The engineer must verify three separate conditions:

Passing one check does not guarantee that the other two requirements are satisfied.

For example, a rivet may fit the material thickness but still protrude because the countersink is too shallow.

Alternatively, the head may seat correctly while the selected rivet length is unsuitable for the material stack-up.

Both conditions must be evaluated before production approval.

Mounting-Hole Preparation and Tolerances

Mounting-hole quality is essential for consistent countersunk blind riveting.

Important production controls include:

• Hole diameter and tolerance

• Hole alignment

• Burr removal

• Countersink angle

• Countersink diameter and depth

• Panel surface condition

• Material stack-up

• Blind-side clearance

An oversized hole may reduce support around the rivet body.

An incorrectly formed countersink may prevent proper head seating.

For OEM production, mounting-hole and countersink requirements should be controlled through the approved engineering drawing and manufacturing instructions.

Metric and Inch Diameter Reference

Common nominal blind rivet diameter references include:

These values are general nominal references and do not establish the available diameter range of this specific JUXIN product.

Metric and inch-designated rivets must be checked for actual dimensions, tolerances, mounting-hole requirements, head geometry and grip range before substitution.

Steel Body and Steel Mandrel Construction

This product uses steel for both the rivet body and pull mandrel.

During installation, the mandrel applies force to deform the rivet body and create the blind-side retaining portion.

The final joint characteristics depend on the rivet design, steel grades, dimensional tolerances and installation conditions.

Steel/steel construction does not establish a particular shear or tensile strength without verified test data.

The appropriate material specification should be selected according to the customer's engineering requirements.

Zinc-Plated Finish and Corrosion Considerations

The zinc-plated finish provides corrosion protection to the steel surfaces on which it is applied.

Actual corrosion performance depends on:

• Zinc coating type and thickness

• Passivation or supplementary treatments

• Steel substrate condition

• Mating materials

• Moisture and electrolyte exposure

• Intended service environment

For applications requiring defined corrosion performance, the coating specification and test acceptance criteria should be included in the customer's technical requirements.

No specific salt spray duration, coating thickness or service-life rating is claimed without verified supporting data.

Installation Method

These 120° countersunk steel blind rivets require a compatible blind riveting tool and nosepiece.

A typical installation sequence is:

1. Prepare the mounting hole and 120° countersink according to the approved drawing.

2. Confirm that the combined material thickness is within the selected rivet's grip range.

3. Align the components to be joined.

4. Insert the blind rivet through the prepared holes.

5. Seat the countersunk head within the matching recess.

6. Engage the steel mandrel with the compatible riveting tool.

7. Pull the mandrel to deform the rivet body on the blind side.

8. Complete the setting operation at the designed mandrel break point.

9. Inspect head seating, blind-side formation and the installed joint.

The installation tool must be compatible with the selected rivet diameter, mandrel configuration and setting requirements.

Production Engineering and Assembly Quality

For manufacturing engineers and production managers, countersunk blind riveting requires consistent control of both the mounting-hole preparation and the rivet setting operation.

Important production considerations include:

• Correct rivet diameter and grip selection

• Consistent countersink machining or forming

• Compatible riveting tools and nosepieces

• Proper head seating

• Acceptable blind-side formation

• Correct mandrel break condition

• Inspection of installed head projection

• Fastener traceability where specified

Variation in countersink depth or panel thickness can affect the finished head position.

For assemblies requiring tight surface-clearance control, installed head projection should be included in the inspection plan.

Mechanical Performance and Joint Reliability

Shear strength and tensile strength describe different loading conditions.

Shear strength concerns loading across the rivet, while tensile strength concerns loading that tends to separate the joined materials along the rivet axis.

Actual joint performance depends on:

• Rivet body diameter

• Steel material grades

• Grip thickness

• Countersink geometry

• Mounting-hole dimensions

• Remaining panel material

• Rivet spacing and edge distance

• Blind-side formation

• Installation quality

A correctly seated countersunk head does not automatically guarantee adequate joint strength.

The installed assembly should be evaluated against the required engineering performance criteria.

Typical Industrial Applications

Zinc-plated steel 120° countersunk blind rivets may be considered for compatible applications such as:

• Flush-mounted sheet-metal panels

• Industrial equipment enclosures

• Electrical cabinets and equipment housings

• Machinery covers and access panels

• Fabricated steel assemblies

• Equipment brackets

• Industrial control panels

• OEM products requiring reduced fastener head projection

Application suitability depends on the actual rivet dimensions, coating specification, material stack-up and joint performance requirements.

International Standards and Technical References

International blind rivet standards distinguish products according to material combination, head geometry, rivet construction and dimensional requirements.

The 120° countersunk head must be evaluated against the actual scope of any specified standard.

A standard covering a different countersunk angle or conventional dome head configuration must not automatically be applied to this product.

Where ISO, DIN, EN or other international standards are required, the applicable edition and product requirements must be verified.

The approved JUXIN engineering drawing and agreed customer specifications remain the controlling technical references until conformity is established.

Inspection and Quality Requirements

Relevant inspection characteristics may include:

• Rivet body diameter and length

• 120° countersunk head angle

• Head diameter and height

• Steel body and mandrel material identification

• Zinc coating requirements

• Mounting-hole compatibility

• Grip range

• Installed head seating and projection

• Blind-side formation

• Mandrel break condition

• Shear and tensile performance where specified

• Surface appearance and packaging

Inspection methods and acceptance criteria should follow the approved drawing and customer requirements.

OEM Customization and Bulk Supply

JUXIN FASTENERS supports drawing-based OEM sourcing for zinc-plated steel 120° countersunk blind rivets.

Customer-specific requirements may include rivet diameter, body length, head dimensions, steel grades, coating specifications, grip range, inspection requirements and packaging.

Technical feasibility and commercial conditions are reviewed according to the required specifications and purchasing quantities.

Frequently Asked Questions

What is a 120° countersunk steel blind rivet?

It is a blind rivet with a steel body, steel mandrel and 120° countersunk head, designed for one-sided installation in a compatible countersunk hole.

What is the difference between countersunk and dome head blind rivets?

A countersunk head is designed to seat within a prepared recess, while a dome head normally protrudes above the accessible panel surface.

Do 120° countersunk blind rivets always sit flush?

No. Flush seating depends on the actual head dimensions, countersink geometry, panel thickness and installation conditions.

Can a 120° countersunk rivet replace a rivet with a different countersunk angle?

Not without engineering verification. The head and mating countersink geometries must be compatible.

Are zinc-plated steel blind rivets suitable for outdoor use?

Suitability depends on the zinc coating specification, mating materials and environmental exposure. No particular outdoor service life is implied.

Are these rivets suitable for thin sheet metal?

They may be suitable where sufficient material remains to support the countersunk head and the joint meets the required mechanical criteria.

What grip range is available?

The actual grip range must be confirmed from the selected JUXIN product specification.

Can JUXIN supply custom 120° countersunk steel blind rivets?

Customer-specific drawings and technical requirements can be submitted for engineering review and quotation.

Request an OEM 120° Countersunk Steel Blind Rivet Quotation

JUXIN FASTENERS supplies industrial blind rivets for OEM manufacturing and bulk purchasing projects.

For technical review and quotation, please provide:

• Rivet body diameter and length

• 120° countersunk head diameter and height

• Required material stack-up and grip range

• Mounting-hole diameter and tolerance

• Countersink dimensions

• Steel material grade requirements

• Zinc coating and surface finish requirements

• 2D engineering drawings or 3D CAD files

• Required mechanical performance

• Inspection and packaging requirements

• Expected purchasing quantity and annual demand forecast

• Target delivery schedule

Email: info@juxinfasteners.com

Website: https://www.juxinfasteners.com/

JUXIN FASTENERS — Industrial Blind Rivets and Custom Fastening Solutions for Global OEM Applications.

Packaging Standard

At Juxin Fasteners, we apply standardized export packaging to ensure product protection, traceability, and compliance with international logistics requirements.

1. Standard Export Packaging

Unless otherwise specified, all products will be packed according to our factory standard export packaging, which includes:

Moisture-resistant inner protection

Poly bag or small box packing as required

Reinforced export cartons

Clear labeling with part number, specification, batch number, and quantity

Palletizing for sea or air shipment when necessary

Our standard packaging is designed to ensure safe transportation, efficient warehousing, and long-distance international shipping.

2. Customized Packaging Options

We also provide customized packaging solutions according to customer requirements, including but not limited to:

Private labeling

Customized barcodes

Specific carton dimensions

Retail packaging

Special pallet configuration

Customer-specific marking and identification

So that you know, customized packaging may involve additional costs and extended lead time depending on the complexity of the requirements.

3. Compliance & Quality Assurance

All packaging processes are controlled under our ISO 9001 quality management system to ensure consistency, traceability, and product integrity throughout the supply chain.