Product Description
Metric Thread Increaser and Reducer Screws – Zinc Plated Steel
Listed FEMALE to MALE
These metric thread increaser and reducer screws allow connections between different metric thread sizes. Manufactured from free-cutting carbon steel with a zinc plated finish, they provide a practical way to adapt threaded fixings in compatible assemblies.
The range covers selected combinations of M6, M8, M10, M12 and M16, all using standard metric coarse pitches. Choose the required conversion from the size menu and check both mating threads before ordering.
Key Features
- Thread size conversion: connects compatible components with different metric thread sizes.
- Increaser and reducer options: a choice of thirteen listed thread combinations.
- Steel construction: manufactured from free-cutting carbon steel.
- Zinc plated finish: provides added corrosion protection.
- Metric coarse threads: standard pitches for the stated diameters.
- Choice of pack quantities: select the quantity required for your project.
Product Specifications
| Product Type | Thread increaser / reducer screw |
|---|---|
| Material | Free-cutting carbon steel |
| Finish | Zinc plated |
| Thread System | Metric coarse |
| Thread Sizes in Range | M6, M8, M10, M12 and M16 |
Available Thread Combinations
| Menu Option | First Thread Size and Pitch | Second Thread Size and Pitch |
|---|---|---|
| M6 to M8 | M6 x 1.0mm | M8 x 1.25mm |
| M6 to M10 | M6 x 1.0mm | M10 x 1.5mm |
| M8 to M6 | M8 x 1.25mm | M6 x 1.0mm |
| M8 to M10 | M8 x 1.25mm | M10 x 1.5mm |
| M8 to M12 | M8 x 1.25mm | M12 x 1.75mm |
| M10 to M6 | M10 x 1.5mm | M6 x 1.0mm |
| M10 to M8 | M10 x 1.5mm | M8 x 1.25mm |
| M10 to M12 | M10 x 1.5mm | M12 x 1.75mm |
| M10 to M16 | M10 x 1.5mm | M16 x 2.0mm |
| M12 to M8 | M12 x 1.75mm | M8 x 1.25mm |
| M12 to M10 | M12 x 1.75mm | M10 x 1.5mm |
| M16 to M10 | M16 x 2.0mm | M10 x 1.5mm |
| M16 to M12 | M16 x 2.0mm | M12 x 1.75mm |
Thread combinations are shown in the same order as the selection menu. Check the product design and the required internal and external thread arrangement before choosing your adaptor. Opposite combinations, such as M6 to M8 and M8 to M6, are separate options.
Typical Applications
- Adapting threaded connections in brackets and fittings.
- Machinery and equipment maintenance.
- Workshop assembly and modification projects.
- Connecting components with different metric fixing sizes.
Choosing and Fitting Your Adaptor
Check the diameter and pitch of both mating threads. Allow sufficient thread engagement and clearance for the adaptor body, and ensure neither connection bottoms out before the assembly is secure.
These adaptors change the connection size; they do not increase the strength of the original fixing. Select a combination suitable for the requirements of the complete assembly.
Select your required thread combination and pack quantity from the available options. If the thread arrangement or dimensions are critical, please contact Spalding Fasteners before ordering.
For help identifying metric threads, see our thread data guide. Browse our bolts and set screws for matching fixings.
| A | B | C | D | E | F |
| 6mm | 8mm | 20mm | 7mm | 12mm | 13mm |
| 6mm | 10mm | 21mm | 7mm | 13mm | 13mm |
| 8mm | 6mm | 19mm | 7mm | 12mm | 13mm |
| 8mm | 10mm | 21mm | 7mm | 13mm | 13mm |
| 8mm | 12mm | 23mm | 7mm | 13mm | 13mm |
| 10mm | 16mm | 32mm | 9mm | 18mm | 19mm |
| 10mm | 12mm | 23mm | 8mm | 13mm | 13mm |
| 10mm | 6mm | 22mm | 9mm | 15mm | 13mm |
| 10mm | 8mm | 23mm | 9mm | 15mm | 13mm |
| 12mm | 8mm | 23mm | 8mm | 15mm | 17mm |
| 12mm | 10mm | 25mm | 8mm | 15mm | 17mm |
| 16mm | 10mm | 32mm | 13mm | 22mm | 24mm |
| 16mm | 12mm | 32mm | 13mm | 22mm | 24mm |
Please Note: Specifications given are intended as a guide only. If critical to your project please check with us first.
