Threaded Inserts

A threaded insert is a cylindrical tube-shaped piece of metal with an internal thread. Threaded inserts are designed to be placed into existing holes to provide a threaded receptacle so that screws, bolts or other fixings can be installed. Threaded inserts with an external thread are also used to strengthen existing threads or to repair damaged threads usually in metalwork.
How to fit a threaded insert
The first step is to drill, mill tap or cut a hole of the recommended size into the material the insert will be embedded. The second step depends entirely on the type of insert, the material it will be used with and how the insert will be fitted.
Types of Threaded Insert
For plastic
Plastics are generally categorized into two main types Thermoplastic and Thermoset. These two plastics may sound similar but their physical characteristics are very different. Therefore the type of insert used is different.
• Thermoset
Thermoset plastics, due to cross-linking polymers at the curing stage enhance the materials physical and mechanical properties. This process makes thermoset plastic easier to mill and drill, so a press-fit threaded insert is better for this application.
• Thermoplastic
Threaded inserts for thermoplastic materials are more specialized and require a slightly different approach. Inserts are installed by heating the metal insert to a specific temperature. Once the desired temperature is reached the threaded insert is pressed onto the plastic. The heat from the metal melts the plastic and the insert fits into the desired position. When the plastic cools the insert is retained.
Threaded inserts for metal
Threaded inserts for metal have an external thread. The insert is simply matched by thread size and screwed into the existing threaded hole.
Threaded inserts for wood
It is possible to use both press-in and thread-in inserts in wood. If however a hardwood is being used it is advised to prepare a slightly larger hole than the insert and secure with a suitable adhesive. Hardwoods have a higher chance of cracking than other woods.
Materials and finishes
Threaded inserts are available in various materials and finishes and metric course threads to suit every application.
• Brass
• Steel
• Stainless Steel (316 & 302)
• Bright zinc plated
• Clear passivated
• Galvanised
• Plain
Thread sizes
M3, M3.5, M4, M5, M6, M8 and M10

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Omschrijving Prijs Thread Size Flange Diameter Fixing Hole Diameter Body Outside Diameter Body Depth Material Stainless Steel Type Finish Thickness of Material Maximum Thickness of Material Minimum
RS-stocknr. 425-7575
Fabrikantnummer23307100235
FabrikantBöllhoff
33,56 €
1 Lot of 100
Lot(s)
M10 19mm 13mm - 22mm Steel - Plain 3.5mm 0.7mm
RS-stocknr. 623-5533
FabrikantPOP
44,55 €
1 Bag of 100
Bag(s)
M8 11.5mm 10.6mm 10.5mm 16mm Steel - Galvanised 3mm 1mm
RS-stocknr. 425-7610
Fabrikantnummer34367080230
FabrikantBöllhoff
31,29 €
1 Lot of 100
Lot(s)
M8 12mm 11mm 16mm 17.5mm Steel - Plain 3mm 0.5mm
RS-stocknr. 623-5498
FabrikantPOP
15,65 €
1 Bag of 100
Bag(s)
M3 5.3mm 4.8mm 4.7mm 9mm Steel - Galvanised 1.5mm 0.5mm
RS-stocknr. 667-9841
FabrikantnummerAVKALS3T-8125-7.9
FabrikantAVK
22,96 €
1 Bag of 50
Bag(s)
M8 17.4mm 13.5mm 13.46mm 10.8mm - - Plain 7.9mm 3.8mm
RS-stocknr. 623-5505
FabrikantPOP
16,74 €
1 Bag of 100
Bag(s)
M4 7mm 6.4mm 6.3mm 10.4mm Steel - Galvanised 1.5mm 0.5mm
RS-stocknr. 212-666
Fabrikantnummer23306030015
FabrikantBöllhoff
63,51 €
1 Bag of 100
Bag(s)
M3 7mm 5mm - 9.3mm Stainless Steel - Plain 1.5mm 0.7mm
RS-stocknr. 425-7569
Fabrikantnummer23307080230
FabrikantBöllhoff
20,95 €
1 Lot of 100
Lot(s)
M8 16mm 11mm - 18mm Steel - Plain 3mm 0.5mm
RS-stocknr. 425-7553
Fabrikantnummer23307060230
FabrikantBöllhoff
29,41 €
1 Lot of 100
Lot(s)
M6 13mm 9mm 13mm 14.5mm Steel - Plain 3mm 0.5mm
RS-stocknr. 664-7355
Fabrikantnummer56000000079/01
FabrikantBöllhoff
34,28 €
1 Lot of 100
Lot(s)
M5 - - - 10mm Steel - Galvanised - -
RS-stocknr. 623-5527
FabrikantPOP
18,28 €
1 Bag of 100
Bag(s)
M5 7.8mm 7.2mm 7.2mm 12mm Steel - Galvanised 2mm 0.5mm
RS-stocknr. 623-5555
FabrikantPOP
53,82 €
1 Bag of 50
Bag(s)
M4 7mm 6mm 5.9mm 10mm Stainless Steel A4 316 Clear Passivated, Galvanised 3mm 0.5mm
RS-stocknr. 194-304
FabrikantAVK
22,84 €
1 Bag of 50
Bag(s)
M8 17.4mm 13.5mm 13.46mm 11.94mm - - Plain 3.8mm 0.7mm
RS-stocknr. 667-9839
FabrikantnummerAVKALS3T-580-5.7
FabrikantAVK
22,96 €
1 Bag of 100
Bag(s)
M5 10.54mm 7.6mm 7.52mm 8mm - - Plain 5.7mm 3.3mm
RS-stocknr. 664-7368
Fabrikantnummer56000000081/01
FabrikantBöllhoff
33,37 €
1 Lot of 100
Lot(s)
M8 - - - 15mm Steel - Galvanised - -
RS-stocknr. 425-7547
Fabrikantnummer23307050230
FabrikantBöllhoff
21,56 €
1 Lot of 100
Lot(s)
M5 10mm 7mm 10mm 13mm Steel - Plain 3mm 0.5mm
RS-stocknr. 703-1281
Fabrikantnummer34366040230
FabrikantBöllhoff
31,30 €
1 Bag of 100
Bag(s)
M4 - 6mm - - Stainless Steel - Plain - -
RS-stocknr. 623-5511
FabrikantPOP
25,24 €
1 Bag of 100
Bag(s)
M6 10.5mm 9.6mm 9.5mm 14.8mm Steel - Galvanised 2.5mm 0.8mm
RS-stocknr. 425-7581
Fabrikantnummer34367040230
FabrikantBöllhoff
15,83 €
1 Lot of 100
Lot(s)
M4 6.7mm 6mm 9mm 11mm Steel - Plain 3mm 0.5mm
RS-stocknr. 866-0322
FabrikantnummerSR 85020-T15P
FabrikantPramet
8,55 €
Each
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