Stainless Steel Indexing Plungers with Black Plastic Knob – Non-Lock-Out Spring Return

Stainless Steel Indexing Plungers with Black Plastic Knob – Non-Lock-Out Spring Return

Stainless Steel Body | Black Plastic Pull Knob | Spring-Return Mechanism | M6, M8 & M10

Juxin Fasteners supplies stainless steel indexing plungers with black plastic knobs and non-lock-out spring-return mechanisms for industrial machinery, 

automation systems, manufacturing fixtures and adjustable mechanical positioning assemblies.

These spring-loaded indexing plungers combine a stainless steel threaded body with a black plastic operating knob and a retractable locating pin.

When the operator pulls the knob, the locating pin retracts from its engaged position. When the knob is released, the internal spring returns the pin toward its extended position.

Unlike lock-out indexing plungers, non-lock-out models do not retain the locating pin in the retracted position.

This design supports repeatable manual positioning, equipment adjustment and fixture engagement without requiring a separate action to release a locking mechanism.

Juxin Fasteners supports OEM machinery manufacturers, mechanical engineers, 

production managers and industrial procurement teams requiring reliable positioning components, technical documentation and drawing-based customization.

Product Specifications – Featured Non-Lock-Out Model

The stainless steel grade, locating pin material, spring material, knob polymer, thread pitch, pin diameter, stroke,

 spring force and dimensional tolerances should be confirmed against the selected product drawing.

How Does a Non-Lock-Out Indexing Plunger Work?

A non-lock-out indexing plunger uses an internal spring to return the locating pin toward its extended position when the operator releases the pull knob.

Typical Operating Sequence

1. Engaged Position: The spring pushes the locating pin toward the mating locating hole or positioning feature.

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

3. Component Adjustment: The fixture, bracket or machine component can be repositioned while the pin is retracted.

4. Automatic Spring Return: Releasing the knob allows the spring to extend the locating pin.

5. Re-Engagement: The pin enters the mating locating hole when the components are correctly aligned.

This operating mechanism is suitable for applications requiring repeated manual positioning and automatic pin return.

A non-lock-out indexing plunger should not be confused with a lock-out or rest-position design that can retain the locating pin in its retracted position.

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.

Black Plastic Pull Knob

The black plastic knob provides a convenient manual interface for retracting the locating pin during equipment adjustment.

The plastic knob is a separate component from the stainless steel body.

Its exact polymer material, temperature resistance and chemical compatibility should be confirmed when relevant to the application.

Automatic Spring-Return Operation

The locating pin returns toward its extended position when the operator releases the knob.

This feature supports repeatable positioning without requiring a separate manual unlocking action.

Spring-Loaded Locating Pin

The internal spring provides the restoring force required for pin extension.

Externally Threaded Mounting Body

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

M6, M8 and M10 Configurations

Multiple nominal mounting thread sizes allow engineers to select suitable components according to installation space and equipment design requirements.

OEM Customization

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

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

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

Stainless Steel Body with Plastic Knob vs. All-Stainless-Steel Indexing Plungers

These two configurations should be distinguished during product selection.

The correct construction should be selected according to the equipment design, operating environment and customer specifications.

Available Indexing Plunger Types and Sizes

In addition to the featured stainless steel non-lock-out model with black plastic knob, 

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

The featured stainless steel indexing plunger with black plastic knob belongs to this broader stainless steel and plastic-component category.

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 Stainless Steel Spring-Return 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 knob is released.

Initial and final spring-load values should be confirmed against the selected technical specification.

5. 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.

6. Black Plastic Knob Requirements

The plastic knob should be evaluated for operating temperature, chemical exposure, grip requirements and repeated manual operation.

The knob material should be confirmed when specific environmental or mechanical properties are required.

7. Installation and Retention

Engineers should evaluate mounting thread engagement, installation accessibility, tightening requirements and any additional retention components.

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

Stainless steel spring-return indexing plungers support adjustable machine components, manual positioning systems and equipment setup mechanisms.

The non-lock-out function allows the locating pin to return automatically when the knob is released.

Jigs and Manufacturing Fixtures

Manufacturing fixtures frequently require repeatable mechanical positioning.

Spring-return indexing plungers allow operators to retract the locating pin during adjustment and re-engage it when the components are aligned.

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 positioning mechanisms can use spring-return indexing plungers for mechanical positioning.

Packaging and Food-Processing Equipment

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

Material grade, plastic knob compatibility and cleaning conditions should be evaluated for each application.

Electrical Equipment Manufacturing

Spring-return 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

• Non-lock-out spring-return mechanism

• Stainless steel threaded body

• Black plastic operating knob

• Standard metric mounting thread options

• Drawing-based dimensional evaluation

• Custom engineering options

For Production Managers

• Convenient manual positioning

• Automatic pin return

• Repeatable fixture engagement

• Support for equipment setup

• Reduced need for separate manual re-engagement

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 grade selection

• Black plastic knob configurations

• 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, plastic components 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 a non-lock-out indexing plunger?

A non-lock-out indexing plunger is a spring-loaded mechanical positioning component that returns its locating pin toward the extended position when the operator releases the knob.

Is this stainless steel indexing plunger self-locking?

No. The featured model is a non-lock-out spring-return type and does not retain the locating pin in the retracted position.

Is the black knob made of stainless steel?

No. The featured model uses a black plastic operating knob with a stainless steel threaded body.

What sizes are available?

The featured stainless steel non-lock-out range includes M6, M8 and M10 nominal mounting thread sizes.

Is this an all-stainless-steel indexing plunger?

No. The featured model combines a stainless steel body with a black plastic knob. All-stainless-steel configurations are available as a separate product family.

Are fine-thread indexing plungers available?

Yes. Selected models across the wider range include M5 × 0.5, M6 × 0.75, M8 × 1.0 and M10 × 1.0 configurations.

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 – Stainless Steel Non-Lock-Out Indexing Plungers

Looking for a manufacturer of stainless steel indexing plungers with black plastic knobs 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

• Non-lock-out or lock-out operation

• Mounting thread diameter and pitch

• Locating pin diameter and retraction stroke

• Stainless steel grade requirements

• Black plastic 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/

Stainless Steel Indexing Plungers | Black Plastic Knob | Non-Lock-Out Spring Return | 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.