KORREX® insulation bushes
Protect against galvanic corrosion where different metals come into contact
KORREX® insulation bushes are essential in various technical applications. They are used for countersunk screws, electrically conductive connections and electrical sockets, among others, as well as mounting semiconductors on PCBs, heat sinks, etc. Made from the thermoplastic polyamide 6, these insulation bushes protect against galvanic corrosion where different metals come into contact.
Three models, wide range of sizes
KORREX® insulation bushes are available in various sizes, which is very useful as a precise size of bush is often required to achieve the desired effect. Three models are available; with a flat flange for metric sizes (type II/M), with a flat flange for imperial sizes (type II/WW), and for countersunk fasteners in imperial sizes (type I/WW). All these models are available in a whole range of sizes (from M4 to M20) and lengths (5 to 25 mm). Ask us for more information or advice if you want to know which dimensions are suitable for your project.
- KORREX® insulation bushes II/M - Flanged collar in metric sizes.
- KORREX® insulation bushes II/WW - Flanged collar in imperial sizes.
- KORREX® insulation bushes I/WW - For countersunk fasteners, in imperial sizes.
For use at connections between different metals
Galvanic corrosion can occur where different metals come into contact under the influence of moisture. KORREX® insulation bushes prevent such damage to the metal and construction. These bushes are suitable for various metal combinations, such as:
- Brass – Iron
- Aluminium – Steel
- Iron – Copper
- Eloxal – Iron
- Iron – Lead
- Zinc – Tin
Advantages of KORREX® insulation bushes
- Protect against galvanic corrosion
- Suitable for common metal combinations
- Always an appropriate size available
TYPE II /M
| Part.No. | Metric | L | d1 | d2 | D | s | packing unit/pcs |
|---|---|---|---|---|---|---|---|
| 1404000000000 | M4 | 5-20 | 4,30 | 5,80 | 9,50 | 1,00 | 500 |
| 1405000000000 | M5 | 5-20 | 5,30 | 6,80 | 12,00 | 1,00 | 500 |
| 1406000000000 | M6 | 5-20 | 6,50 | 8,00 | 13,00 | 1,00 | 500 |
| 1408000000000 | M8 | 5-25 | 8,20 | 10,40 | 18,00 | 1,00 | 500 |
| 1410000000000 | M10 | 5-25 | 10,20 | 12,50 | 21,00 | 1,00 | 500 |
| 1412000000000 | M12 | 5-25 | 12,30 | 15,00 | 24,00 | 1,00 | 500 |
| 1416000000000 | M16 | 5-25 | 16,30 | 19,30 | 30,00 | 2,00 | 500 |
| 1420000000000 | M20 | 5-25 | 20,30 | 23,30 | 36,00 | 2,00 | 100 |
- Dimensions in MM
TYPE I /W
| Part.No. | For thread size | L | d1 | d2 | D | s | packing unit/pcs |
|---|---|---|---|---|---|---|---|
| 1401100000000 | 1/2" | 12,00 | 13,00 | 16,00 | 28,00 | 5,00 | 500 |
| 1401110000000 | 1/2" | 14,00 | 13,00 | 16,00 | 26,00 | 6,00 | 500 |
| 1401120000000 | 1/2" | 15,00 | 12,50 | 14,50 | 24,00 | 5,00 | 500 |
| 1401130000000 | 1/2" | 17,50 | 14,00 | 16,00 | 28,00 | 6,00 | 100 |
| 1401140000000 | 1/2" | 23,00 | 13,00 | 16,00 | 26,00 | 5,00 | 100 |
| 1401160000000 | 5/8" | 12,00 | 16,00 | 18,50 | 31,00 | 8,00 | 100 |
- Dimensions in MM
TYPE I / W
| Part.No. | Metric | L | d1 | d2 | D | s | packing unit/pcs |
|---|---|---|---|---|---|---|---|
| 1404000000000 | M4 | 5-20 | 4,30 | 5,80 | 9,50 | 1,00 | 500 |
| 1405000000000 | M5 | 5-20 | 5,30 | 6,80 | 12,00 | 1,00 | 500 |
| 1406000000000 | M6 | 5-20 | 6,50 | 8,00 | 13,00 | 1,00 | 500 |
| 1408000000000 | M8 | 5-25 | 8,20 | 10,40 | 18,00 | 1,00 | 500 |
| 1410000000000 | M10 | 5-25 | 10,20 | 12,50 | 21,00 | 1,00 | 500 |
| 1412000000000 | M12 | 5-25 | 12,30 | 15,00 | 24,00 | 1,00 | 500 |
| 1416000000000 | M16 | 5-25 | 16,30 | 19,30 | 30,00 | 2,00 | 500 |
| 1420000000000 | M20 | 5-25 | 20,30 | 23,30 | 36,00 | 2,00 | 100 |
- Dimensions in MM
Characteristics
Widely applicable
- For insulation from the exterior
- In electrical circuits
- When mounting semiconductors
Available in multiple sizes
- In metric sizes from M4 to M20
- In lengths from 5 to 25 mm
Made of thermoplastic polyamide
- Prevent ion exchange between metals
- Prevent galvanic corrosion
Can be used in combination with:
Dubo® retaining washers
Dubo® retaining washers are effective and easy to use. Dubo® retaining washers have a unique design which forces the nylon to encase the screw thread and the bolt hole when the connection is tightened. It offers an effective and cost-effective solution for manufacturers and installers who need permanent, durable locking.
KORREX® protective caps for socket screws
KORREX® protective caps for socket screws are the ideal protection for common socket screws. Dirt and dust tend to accumulate in the hex socket, which makes unscrewing increasingly difficult.
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Disclaimer: All descriptions, technical information, drawings and dimensions on this website have been compiled by Dubo Dorned B.V. with the greatest care. Nevertheless, Dubo Dorned B.V. cannot accept any liability for type-setting and typographical errors, technical changes to the products or for any incidental or consequential damage in connection with our technical statements or our ability to deliver. All drawings and descriptions on this website are in no way of an agreed quality. The information herein concerns typical values intended for reference and comparison purposes only. It should NOT be used as a basis for design specifications or quality control. Contact us for full material property datasheets from manufacturers. Understandably, the application of the products listed assumes expertise on their use and assembly as well as standards. All our offers and any subsequent orders and agreements resulting thereof are exclusively subject to the General Terms and Conditions of Dubo Dorned BV.