Nickel-Plated Steel Indexing Plungers – Lock-Out Type

Nickel-Plated Steel Indexing Plungers – Lock-Out Type

Carbon Steel Body | Nickel-Plated Finish | Plastic Pull Knob | M6, M8 & M10

Juxin Fasteners supplies nickel-plated steel indexing plungers with lock-out mechanisms for industrial machinery, automation systems, manufacturing fixtures and adjustable mechanical assemblies.

Featuring a nickel-plated carbon steel body, plastic pull knob and spring-loaded retractable locating pin, these indexing plungers are designed to hold the locating pin in its retracted position when the lock-out mechanism is engaged.

Unlike standard non-lock-out indexing plungers, the lock-out design allows operators to reposition equipment components or change fixtures without continuously holding the pull knob.

Our products support OEM machinery manufacturers, mechanical design engineers, production managers and industrial procurement teams requiring reliable positioning components and drawing-based manufacturing solutions.

Product Specifications – Featured Lock-Out Model

The exact pin material, spring material, thread pitch, pin diameter, stroke, spring force, dimensions and tolerances should be confirmed against the selected product drawing.

How Does a Lock-Out Indexing Plunger Work?

A lock-out indexing plunger combines a spring-loaded locating pin with a mechanism that allows the pin to remain retracted during machine adjustment.

Typical Operating Sequence

1. Engaged Position: The spring-loaded pin extends into a compatible locating hole or positioning feature.

2. Manual Retraction: The operator pulls the plastic knob to withdraw the locating pin.

3. Lock-Out Engagement: The operator engages the locking mechanism to retain the pin in its retracted position.

4. Equipment Adjustment: The fixture or adjustable machine component can be repositioned without continuously holding the knob.

5. Lock-Out Release: The operator disengages the locking mechanism.

6. Spring Return: The internal spring drives the pin toward its extended position, allowing engagement when the mating hole is aligned.

Many conventional pull-and-twist lock-out indexing plungers use a 90-degree knob rotation and a retaining notch. The exact locking operation must correspond to the selected product design.

Lock-Out vs. Non-Lock-Out Indexing Plungers

The lock-out mechanism is intended to retain the locating pin in its retracted position. It should not be confused with a safety-rated locking device or a certified machine-guard interlock.

Key Product Features

Nickel-Plated Carbon Steel Construction

The carbon steel threaded body provides a practical mounting structure for general industrial machinery and positioning assemblies.

Nickel plating provides a protective metallic finish and uniform surface appearance.

The required coating thickness, corrosion resistance and plating process should be specified when relevant to the operating environment.

Lock-Out / Rest-Position Function

The lock-out mechanism allows the locating pin to remain retracted during machine adjustments, fixture changes and component repositioning.

This feature is particularly useful when the operator needs both hands to handle an adjustable component.

Plastic Pull Knob

The plastic operating knob provides a convenient manual interface for retracting the locating pin and operating the locking mechanism.

Spring-Loaded Locating Pin

The internal spring provides the restoring force required to extend the pin after the lock-out mechanism is released.

Threaded Mounting Design

The externally threaded body allows installation into a compatible threaded mounting hole or mounting component.

M6, M8 and M10 Options

Multiple nominal mounting thread sizes allow engineers to select configurations according to installation space, equipment design and mechanical positioning requirements.

OEM Engineering Support

Juxin Fasteners can evaluate custom dimensions, thread requirements, pin geometry, material specifications and other drawing-based modifications.

Available Indexing Plunger Types and Sizes

In addition to the featured nickel-plated steel lock-out model, Juxin Fasteners supplies a broader range of indexing plungers for industrial positioning applications.

Our product portfolio includes 40 listed configurations across seven material and structural groups.

1. Ultra-Miniature Stainless Steel Indexing Plungers

Compact stainless steel indexing plungers for miniature mechanical assemblies, space-constrained fixtures and positioning mechanisms.

Lock-Out Type

• M5 × 0.8

• M5 × 0.5 – Fine Thread

Non-Lock-Out / Spring-Return Type

• M5 × 0.8

• M5 × 0.5 – Fine Thread

2. All-Stainless-Steel Indexing Plungers – Standard Metric Threads

Stainless steel construction for industrial equipment requiring stainless steel material configurations.

Non-Lock-Out / Spring-Return Type

• M6

• M8

• M10

Lock-Out / Rest-Position Type

• M6

• M8

• M10

3. All-Stainless-Steel Indexing Plungers – Fine Metric Threads

Fine-thread stainless steel configurations for specialized mounting and positioning requirements.

Non-Lock-Out / Spring-Return Type

• M6 × 0.75

• M8 × 1.0

• M10 × 1.0

Lock-Out / Rest-Position Type

• M6 × 0.75

• M8 × 1.0

• M10 × 1.0

4. Carbon Steel Indexing Plungers

Carbon steel configurations for general industrial machinery, production fixtures and mechanical positioning assemblies.

Non-Lock-Out / Spring-Return Type

• M6

• M8

• M10

Lock-Out / Rest-Position Type

• M6

• M8

• M10

5. Stainless Steel Indexing Plungers with Plastic Base – Standard Metric Threads

Combined stainless steel and plastic-base configurations for equipment requiring specific material and structural combinations.

Non-Lock-Out / Spring-Return Type

• M6

• M8

• M10

Lock-Out / Rest-Position Type

• M6

• M8

• M10

6. Nickel-Plated Carbon Steel Indexing Plungers

Nickel-plated carbon steel configurations for machinery, industrial fixtures and adjustable positioning mechanisms.

Non-Lock-Out / Spring-Return Type

• M6

• M8

• M10

Lock-Out / Rest-Position Type

• M6

• M8

• M10

The featured product on this page belongs to the nickel-plated carbon steel lock-out group.

7. Stainless Steel Indexing Plungers with Plastic Base – Fine Metric Threads

Fine-thread stainless steel and plastic-base configurations for specialized equipment and mounting requirements.

Non-Lock-Out / Spring-Return Type

• M6 × 0.75

• M8 × 1.0

• M10 × 1.0

Lock-Out / Rest-Position Type

• M6 × 0.75

• M8 × 1.0

• M10 × 1.0

Metric Thread Selection Guide

The following standard metric coarse-thread pitches are provided as engineering references.

Available Fine-Thread Configurations

Standard coarse-thread pitches are reference values and must not be assumed for every product without checking its drawing.

The availability of each thread size and pitch depends on the selected material and operating configuration.

Metric-to-Inch Dimension Reference

These values are nominal diameter conversions for engineering reference only.

Metric threads are not directly interchangeable with UNC or UNF threads. Custom inch-thread configurations require separate technical evaluation.

Engineering Selection Guide for Lock-Out Indexing Plungers

1. Mounting Thread Diameter and Pitch

Confirm the nominal mounting thread, thread pitch, engagement length and installation space.

Thread compatibility is essential for correct mounting and mechanical retention.

2. Locating Pin Diameter

The locating pin diameter must be compatible with the mating hole or locating feature.

The required fit depends on clearance, dimensional tolerance, positioning repeatability and assembly design.

3. Pin Retraction Stroke

The retraction stroke must provide sufficient clearance to disengage the mating component before repositioning.

Insufficient stroke may prevent complete release of the locating mechanism.

4. Spring Force

Spring force influences manual operating effort and the restoring force available when the lock-out mechanism is released.

Initial and final spring loads should be confirmed from the selected technical specification.

5. Lock-Out Retention

The lock-out mechanism must reliably maintain the pin in its retracted position under the intended operating conditions.

The mechanism should be evaluated for repeated manual operation, vibration exposure and potential unintended release.

6. Pin Material and Surface Treatment

The locating pin material, hardness and finish should be selected according to wear, contact conditions and application requirements.

A nickel-plated body does not automatically mean every internal component is nickel-plated.

7. Mounting and Assembly Requirements

Engineers should review thread engagement, installation torque, mounting accessibility and any required retention components.

8. Application Loads and Safety

Indexing plungers are primarily positioning components.

They should not be assumed to function as load-rated structural fasteners, safety interlocks or personnel-protection devices without application-specific engineering validation.

Industrial Applications for Lock-Out Indexing Plungers

Industrial Automation and Machine Building

Lock-out indexing plungers support manual positioning and adjustment in industrial machinery and automated production equipment.

They are suitable for mechanisms requiring the locating pin to remain retracted while an assembly is repositioned.

Jigs, Fixtures and Quick-Change Tooling

Manufacturing fixtures frequently require temporary disengagement of locating pins during setup or tooling changes.

The lock-out function allows operators to keep the pin retracted while moving fixture components or replacing tooling.

CNC Machinery and Machine Tools

Lock-out indexing plungers can be used in adjustable machine accessories, auxiliary positioning mechanisms and fixture assemblies.

Engineers should evaluate operating loads, vibration and dimensional requirements before selection.

Automotive and EV Manufacturing Equipment

Automotive assembly fixtures, adjustable production tooling and equipment changeover systems can benefit from retractable positioning pins.

Lock-out designs are particularly relevant where temporary hands-free disengagement is required during manufacturing setup.

Packaging Machinery

Adjustable guide rails, positioning brackets and changeover assemblies may use lock-out indexing plungers to facilitate equipment adjustments.

Electrical and Electronics Manufacturing Equipment

Lock-out indexing plungers can be integrated into test fixtures, adjustable mechanical assemblies and production workstations.

The selected material and dimensions should be compatible with the equipment's operating requirements.

Semiconductor Equipment Manufacturing

Compact and precision-positioning assemblies in semiconductor equipment manufacturing may use indexing plungers for suitable non-process-critical mechanical adjustment functions.

Material cleanliness, vibration and dimensional requirements should be evaluated for each application.

Benefits for OEM Engineers, Production Managers and Procurement Teams

For Mechanical and Design Engineers

• Lock-out mechanism for retained pin retraction

• Standard and fine metric thread options across the product range

• Carbon steel and stainless steel material configurations

• Multiple locating pin and mounting design possibilities

• OEM drawing-based customization

For Production Managers

• Convenient equipment adjustment

• Hands-free positioning during fixture changeovers

• Reduced need to continuously hold the retracting knob

• Repeatable mechanical positioning

• Support for manual setup and tooling changes

For Industrial Procurement and Supply Chain Teams

• Broad indexing plunger product selection

• Material and finish options

• Standardized component sourcing

• Custom engineering evaluation

• Industrial batch production support

• RoHS and REACH documentation review

OEM Manufacturing and Custom Indexing Plunger Solutions

Juxin Fasteners has more than 20 years of industrial fastener manufacturing experience, serving international OEM customers and industrial equipment manufacturers.

Our engineering and manufacturing teams support drawing-based evaluation of standard and custom indexing plunger configurations.

Custom Engineering Options

• Carbon steel and stainless steel materials

• Nickel-plated surface finishes

• Custom metric mounting threads

• Fine-thread configurations

• Custom locating pin diameters

• Modified pin lengths and retraction strokes

• Spring-force requirements

• Plastic knob configurations

• Lock-out and non-lock-out mechanisms

• Dimensional tolerance requirements

• OEM part-number identification

• Industrial production quantities

Custom manufacturing feasibility, material specifications, dimensional requirements and commercial terms are reviewed according to each project.

Quality Control and Compliance Documentation

For OEM purchasing projects, Juxin Fasteners can evaluate customer requirements for dimensional inspection, material verification, surface treatment and product documentation.

Juxin Fasteners maintains RoHS and REACH compliance documentation.

Product-specific conformity documentation can be reviewed according to the applicable materials, plating specifications and customer requirements.

Customers are encouraged to provide detailed engineering drawings, material specifications and inspection requirements before production approval.

Frequently Asked Questions

What is a lock-out indexing plunger?

A lock-out indexing plunger is a spring-loaded locating component with a mechanism that allows the locating pin to remain retracted during equipment adjustment or repositioning.

What is the difference between lock-out and non-lock-out indexing plungers?

A lock-out indexing plunger can retain its pin in the retracted position when the locking mechanism is engaged. 

A non-lock-out indexing plunger automatically returns toward its extended position when the knob is released.

Are lock-out indexing plungers the same as self-locking pins?

Not necessarily. Lock-out indexing plungers specifically describe components with a retained retracted position. 

The broader term self-locking pin may refer to other locking mechanisms.

What materials are used in this nickel-plated indexing plunger?

The featured product has a nickel-plated carbon steel body and plastic pull knob. 

Pin, spring and other internal component materials should be confirmed from the selected technical specification.

What thread sizes are available?

The featured nickel-plated steel lock-out range includes M6, M8 and M10 configurations.

 Our wider indexing plunger portfolio also includes M5 miniature versions and selected fine-thread options.

Are stainless steel lock-out indexing plungers available?

Yes. Juxin Fasteners offers stainless steel and all-stainless-steel lock-out configurations, including standard and selected fine metric threads.

Can indexing plungers be customized for OEM machinery?

Yes. We can evaluate custom threads, locating pin geometry, stroke, material selection, knob configurations and dimensional requirements based on customer drawings.

Can you provide 2D drawings, 3D CAD models and samples?

Please provide the required configuration, size and application details. 

Our team can review drawing availability, CAD requirements, sample options and quotation details.

Request a Quotation – Nickel-Plated Steel Lock-Out Indexing Plungers

Looking for a manufacturer of nickel-plated steel lock-out indexing plungers for industrial machinery, automation equipment, manufacturing fixtures or OEM production systems?

Juxin Fasteners supplies spring-loaded indexing plungers in carbon steel, nickel-plated steel, stainless steel and other material configurations.

We support international OEM customers requiring standard products, custom engineering solutions and industrial batch supply.

Please Include the Following Information in Your RFQ:

• Required indexing plunger type

• Lock-out or non-lock-out operation

• Mounting thread diameter and pitch

• Locating pin diameter and retraction stroke

• Body and pin material requirements

• Surface finish specifications

• Spring-force requirements

• 2D drawings or 3D CAD files, if available

• Estimated annual usage and purchase quantity

• Required delivery destination

Juxin Fasteners – Precision Fastener Manufacturer

Email: info@juxinfasteners.com

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

Nickel-Plated Steel Indexing Plungers | Lock-Out Indexing Pins | Industrial Positioning Components | OEM Custom Manufacturing

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.