All-Stainless-Steel Indexing Plungers – Lock-Out Type

All-Stainless-Steel Indexing Plungers – Lock-Out Type

Stainless Steel Body | Stainless Steel Knob | Lock-Out / Rest Position | M6, M8 & M10

Juxin Fasteners manufactures and supplies all-stainless-steel indexing plungers with stainless steel threaded bodies, 

stainless steel operating knobs and lock-out mechanisms for industrial machinery, automation equipment, manufacturing fixtures and adjustable mechanical positioning assemblies.

These spring-loaded mechanical positioning components use a retractable locating pin that can be held in its withdrawn position during equipment adjustment or tooling changeover.

The lock-out mechanism allows operators to keep the locating pin retracted without continuously pulling the operating knob.

Unlike non-lock-out spring-return indexing plungers, the featured lock-out design requires the retaining mechanism to be released before the locating pin can return toward its extended position.

The stainless steel body and stainless steel knob provide a metal-component construction option for industrial OEM manufacturers requiring mechanical positioning components with corrosion-resistant external materials.

Product Specifications – Featured Lock-Out Model

The exact stainless steel grades, locating pin material, spring material, thread pitch, pin diameter, stroke, spring force,

 dimensional tolerances and surface condition should be confirmed against the selected product drawing.

How Does a Stainless Steel Lock-Out Indexing Plunger Work?

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indexing plunger combines a spring-loaded locating pin with a retaining mechanism that allows the pin to remain withdrawn during machine adjustment.

Typical Operating Sequence

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

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

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

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

5. Lock-Out Release: The operator disengages the retaining 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 rotating knob and a retaining notch.

The exact operating procedure and rotation angle should be verified against the selected product design.

Key Product Features

Stainless Steel Threaded Body

The stainless steel body provides a corrosion-resistant material option for industrial machinery and mechanical positioning assemblies.

Actual corrosion performance depends on the stainless steel grade, surface condition, operating environment and exposure conditions.

Stainless Steel Operating Knob

The stainless steel knob provides a metal operating interface for manually retracting and locking the locating pin.

Unlike plastic-knob indexing plungers, this configuration uses a stainless steel external operating component.

The knob geometry, surface finish and operating requirements should be verified against the selected product drawing.

Lock-Out / Rest-Position Mechanism

The lock-out mechanism retains the locating pin in its retracted position during machine adjustments and fixture changes.

This feature is useful when operators need both hands to reposition equipment components or replace tooling.

Spring-Loaded Locating Pin

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

Externally Threaded Mounting Body

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

Standard and Fine Metric Thread Options

M6, M8 and M10 standard configurations are available, together with selected fine-thread options across the stainless steel range.

OEM Customization

Juxin Fasteners supports drawing-based evaluation of custom threads, locating pin dimensions, stroke requirements, material specifications and other engineering requirements.

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

The featured all-stainless-steel indexing plunger on this page is the lock-out version.

Stainless Steel Knob vs. Black Plastic Knob Indexing Plungers

These two configurations should be distinguished during engineering selection.

The correct knob material should be selected according to equipment requirements, environmental conditions and customer specifications.

Available Indexing Plunger Types and Sizes

In addition to the featured all-stainless-steel lock-out model, Juxin Fasteners offers a broad range of indexing plungers for industrial positioning applications.

The following 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 positioning mechanisms and space-constrained mechanical assemblies.

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

All-stainless-steel configurations for industrial machinery and positioning systems requiring stainless steel construction.

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 indexing plungers 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 indexing plungers for industrial machinery, production fixtures and adjustable mechanical 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 Components – Standard Metric Threads

Stainless steel configurations incorporating plastic components for specific industrial positioning and mounting requirements.

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 industrial machinery, positioning systems and adjustable fixtures.

Non-Lock-Out / Spring-Return Type

• M6

• M8

• M10

Lock-Out / Rest-Position Type

• M6

• M8

• M10

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

Fine-thread stainless steel and plastic-component configurations for specialized mechanical assemblies.

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.

Fine-Thread Options Across the Product Range

• M5 × 0.5

• M6 × 0.75

• M8 × 1.0

• M10 × 1.0

Thread availability depends on the selected product family and operating configuration.

The standard coarse-thread pitches shown above are reference values and should not be assumed for every individual model without checking the corresponding drawing.

Metric-to-Inch Diameter Reference

These conversions represent nominal metric thread diameters only.

Metric and UNC/UNF threads are not directly interchangeable. Custom inch-thread configurations require separate engineering evaluation.

Engineering Selection Guide for All-Stainless-Steel Lock-Out Indexing Plungers

1. Mounting Thread Diameter and Pitch

Verify the external mounting thread diameter, pitch, thread engagement length and mating threaded component.

Correct thread compatibility is essential for secure installation.

2. Locating Pin Diameter

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

Pin-to-hole clearance and dimensional tolerances influence positioning repeatability and mechanical fit.

3. Retraction Stroke

The locating pin must retract sufficiently to disengage the mating component during equipment adjustment.

The required stroke should be verified against the machine assembly design.

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-load values should be confirmed against the selected technical specification.

5. Lock-Out Retention

The retaining mechanism must maintain the pin in its retracted position under the intended operating conditions.

Repeated operation, vibration exposure and potential unintended release should be considered during equipment design.

6. Stainless Steel Grade and Corrosion Resistance

The required stainless steel grade should be selected according to the application environment.

Corrosion resistance depends on the material grade, surface condition, cleaning chemicals and exposure conditions.

7. Stainless Steel Knob Requirements

The metal knob should be evaluated for operating temperature, surface finish, grip requirements and repeated manual operation.

8. Mechanical Loads and Safety

Indexing plungers are primarily positioning components.

Their suitability for shear loads, impact, vibration or safety-related functions must be confirmed through application-specific engineering evaluation.

They should not be assumed to provide a certified safety interlock or structural load-bearing function.

Industrial Applications

Industrial Automation and Machine Building

All-stainless-steel lock-out indexing plungers support adjustable machine components, manual positioning systems and equipment setup mechanisms.

The lock-out function allows the locating pin to remain withdrawn while operators reposition an assembly.

Jigs, Fixtures and Quick-Change Tooling

Manufacturing fixtures often require temporary disengagement of locating pins during tooling changes.

Lock-out indexing plungers allow operators to hold the pin retracted without continuous manual effort.

CNC Machinery and Machine Tools

These components may be used in adjustable machine accessories, auxiliary positioning mechanisms and fixture assemblies.

The selected design should be evaluated for installation dimensions, operating loads and vibration conditions.

Automotive and EV Manufacturing Equipment

Automotive production fixtures, assembly tooling and equipment changeover mechanisms can use lock-out indexing plungers for mechanical positioning.

The retained retraction function is useful during manual fixture adjustment and tooling replacement.

Packaging and Food-Processing Equipment

Selected stainless steel configurations may be suitable for adjustable equipment components where corrosion resistance is required.

Material grade, surface finish and cleaning conditions should be evaluated for each application.

Electrical Equipment Manufacturing

Lock-out indexing plungers can support mechanical positioning in industrial electrical equipment assembly fixtures and production tooling.

Electronics and Semiconductor Equipment Manufacturing

Selected indexing plungers may be used in adjustable mechanical fixtures, equipment positioning assemblies and non-process-critical machine components.

Material cleanliness, dimensional accuracy and operating conditions should be evaluated for specialized applications.

Benefits for OEM Engineers, Production Managers and Procurement Teams

For Mechanical and Design Engineers

• Lock-out positioning mechanism

• Stainless steel threaded body

• Stainless steel operating knob

• Standard and fine metric thread options

• Drawing-based dimensional evaluation

• Custom engineering options

For Production Managers

• Hands-free pin retraction during fixture adjustments

• Convenient equipment setup

• Support for tooling changeovers

• Repeatable mechanical positioning

• Reduced need to continuously hold the operating knob

For Industrial Procurement and Supply Chain Teams

• Standard and custom indexing plunger sourcing

• Multiple material and operating options

• OEM engineering support

• Industrial batch supply

• Technical documentation review

• RoHS and REACH documentation support

OEM Manufacturing and Custom Indexing Plunger Solutions

With more than 20 years of industrial fastener manufacturing experience, 

Juxin Fasteners supports international OEM customers and industrial equipment manufacturers with standard and custom-engineered mechanical components.

Our team can evaluate customer requirements for:

• Stainless steel body materials

• Stainless steel knob configurations

• Stainless steel grade selection

• Standard metric mounting threads

• Fine-thread configurations

• Custom locating pin diameters

• Modified pin lengths and retraction strokes

• Spring-force requirements

• Lock-out and non-lock-out mechanisms

• Drawing-specific dimensional tolerances

• OEM part-number identification

• Industrial production quantities

Custom manufacturing feasibility, material requirements, inspection specifications and delivery schedules are reviewed according to each project.

Quality Control and Technical Documentation

Juxin Fasteners supports engineering and procurement teams requiring product specifications, dimensional inspection requirements and material documentation.

Our company maintains RoHS and REACH compliance documentation.

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

Customers are encouraged to provide 2D drawings, 3D CAD models or detailed technical specifications for engineering evaluation.

Frequently Asked Questions

What is an all-stainless-steel lock-out indexing plunger?

An all-stainless-steel lock-out indexing plunger is a spring-loaded mechanical positioning component with a stainless steel threaded body,

 stainless steel operating knob and a mechanism that can retain the locating pin in its retracted position.

Does the locating pin stay retracted after the knob is released?

Yes, when the lock-out mechanism has been properly engaged. The pin returns toward its extended position after the retaining mechanism is released.

Is the operating knob made of stainless steel?

Yes. The featured model uses a stainless steel operating knob rather than a black plastic knob.

What sizes are available?

The featured standard configurations include M6, M8 and M10. Selected fine-thread configurations are also available across the wider stainless steel series.

Are non-lock-out versions available?

Yes. Juxin Fasteners also offers all-stainless-steel indexing plungers with non-lock-out spring-return mechanisms.

Can indexing plungers be customized for OEM machinery?

Yes. We support engineering evaluation of custom threads, locating pin dimensions, spring-force requirements, materials, knob configurations and other drawing-based specifications.

Can I request 2D drawings, 3D models or samples?

Please provide the required product configuration and technical specifications. Our team can review drawing availability, CAD requirements, sample options and quotation details.

Request a Quotation – All-Stainless-Steel Lock-Out Indexing Plungers

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

Juxin Fasteners supplies spring-loaded indexing plungers in stainless steel, carbon steel, nickel-plated 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

• Stainless steel grade requirements

• Stainless steel knob specifications

• Spring-force requirements

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

• Estimated annual usage and order quantity

• Required delivery destination

Juxin Fasteners – Precision Fastener Manufacturer

Email: info@juxinfasteners.com

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

All-Stainless-Steel Indexing Plungers | Stainless Steel Knob | Lock-Out Positioning Pins | 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.