Self-Tapping Threaded Reducer Inserts – M3 M4 M6 M8 M10 – Slotted Thread Repair Bushes
Self-tapping threaded reducer inserts designed for repairing damaged, stripped or worn internal threads in suitable metal components. These solid threaded bushings feature a slotted cutting design, fully threaded construction and a passivated exterior finish, providing a practical solution for thread restoration, engineering, machinery maintenance and general workshop repairs.
Available in five internal thread sizes – M3, M4, M6, M8 and M10 – each insert features a corresponding larger external thread and a consistent 10mm overall length. The slotted design is intended to assist with cutting the receiving thread in a correctly prepared hole, subject to material suitability. Simply select your required thread size and pack quantity from the variation options before ordering.
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Key Features
Complete Your Repair
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Product Summary
Why Choose Threaded Reducer Inserts?
Available Thread Sizes – Select Your Variation
Choose the required internal thread size and pack quantity from the variation options. All inserts are 10mm long.
| Internal Thread | External Thread | Length |
|---|---|---|
| M3 | M5 | 10mm |
| M4 | M6 | 10mm |
| M6 | M8 | 10mm |
| M8 | M10 | 10mm |
| M10 | M12 | 10mm |
Important: The internal thread is the smaller thread that accepts the fastener. The external thread is the larger thread on the outside of the insert. Please confirm both dimensions before purchasing.
Package Contents
- Self-Tapping Slotted Threaded Reducer Inserts – Selected Size & Quantity
- VAT Invoice Provided
The quantity supplied will match the pack quantity selected from the variation menu. All inserts within the selected pack will be the same thread size. Installation tools are not included.
Technical Specifications
| Specification | Details |
|---|---|
| Product Type | Self-Tapping Threaded Reducer Insert |
| Construction | Solid Threaded Bushing |
| Internal Thread Sizes | M3, M4, M6, M8, M10 |
| External Thread Sizes | M5, M6, M8, M10, M12 |
| Overall Length | 10mm |
| Thread Coverage | Fully Threaded |
| Thread System | Metric |
| Exterior Finish | Passivated |
| Material | Metal – Grade Not Specified |
| Insert Design | Slotted Cutting Style |
| Intended Substrate | Suitable Metal Components |
| Installation Tools | Not Included |
| Condition | New |
External thread sizes are nominal metric thread designations and should not be confused with the recommended installation drill diameter. Thread pitches and required hole preparation must be confirmed for the selected size.
Typical Applications
- Damaged or stripped internal thread restoration
- Reducing compatible larger threaded openings
- Engineering and metalworking repairs
- Machinery and equipment maintenance
- Metal housings and mechanical assemblies
- Workshop maintenance and refurbishment
- Creating replacement internal threads in suitable prepared metal holes
Application suitability depends on the parent material, existing hole diameter, available wall thickness, thread engagement, loading conditions and correct installation.
Installation Guidance
- Select: Confirm the required internal thread size, corresponding external thread and 10mm insert length.
- Inspect: Check the parent material, existing hole dimensions, available wall thickness and installation depth.
- Prepare: Prepare the receiving hole to the correct dimensions for the selected insert and parent material.
- Install: Use suitable installation tooling and follow the supplier's recommended procedure for the slotted insert design.
- Check: Confirm correct seating, alignment and internal thread condition before putting the repaired component into service.
Do not assume the nominal external thread size is the required drill diameter. Installation requirements vary according to insert size, design and substrate. Incorrect hole preparation may damage the insert or parent material.
This is a variation listing for self-tapping slotted threaded reducer inserts, available in M3, M4, M6, M8 and M10 internal thread sizes.
Variation Selection: Please select the required thread size and pack quantity before purchasing. The quantity supplied will correspond to your chosen variation.
Internal & External Threads: Each insert has a smaller internal thread and larger external thread. Both dimensions must be checked for compatibility.
Insert Length: All variations measure 10mm in overall length. Confirm sufficient installation depth and surrounding material are available.
Thread Pitch: Exact internal and external thread pitches must be confirmed before installation. The nominal thread sizes alone do not establish pitch.
Installation: Suitable hole preparation and installation tooling are required. Installation tools are not supplied.
Product Compatibility: These are generic threaded reducer inserts and are not TIME-SERT®, BIG-SERT® or Helicoil products. They should not be assumed interchangeable with proprietary thread repair systems.
For safety-critical or heavily loaded applications, professional assessment and installation are recommended.
Durability & Installation
The durability and performance of these threaded reducer inserts depend on the parent material, application, loading conditions, correct hole preparation and installation. No specific service life, load capacity or durability guarantee is provided. This does not affect your statutory consumer rights.
We offer a 30-day returns period, subject to the applicable return conditions and your statutory rights.
For change-of-mind returns, goods should be unused, complete and securely packaged, preferably in their original packaging. Return postage is normally the buyer's responsibility.
Where permitted by applicable law and eBay policy, deductions may apply for any reduction in value resulting from handling beyond what is necessary to inspect the goods. This does not affect your statutory rights.
Fast Dispatch • Threaded Reducer Inserts • M3–M10 • 10mm Long • VAT Invoice Provided
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We aim to dispatch most in-stock orders placed before 12:00 noon on working days on the same day. When purchasing multiple items from our shop, we will always try to combine postage and packaging costs wherever possible. Available delivery services may include:
Delivery estimates and available postage options are displayed at checkout. Highlands, Islands & Remote Locations Some destinations may incur an additional courier surcharge depending on the service and delivery location. Where possible, an alternative delivery service will be considered. If you are unsure whether additional charges apply to your postcode, please contact us before purchasing. |
Buy with confidence from ACE Consumables. We offer a 30-day returns period on eligible items, subject to the applicable return conditions and your statutory consumer rights. For change-of-mind returns, products should be returned unused, complete and securely packaged, preferably in their original packaging. Return postage for change-of-mind returns is normally the buyer's responsibility unless otherwise stated in the listing. If an item arrives damaged, faulty or incorrect, please get in touch through eBay so we can resolve the issue promptly. Where permitted by law and eBay policy, deductions may apply for any reduction in value caused by handling beyond what is necessary to inspect the item. Your statutory rights are not affected. |
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ACE Consumables Disclaimer: ACE Consumables reserves the right to amend product information and applicable terms where permitted by law. This does not affect existing contractual obligations or statutory rights. |