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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Description Price 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庫存編號 623-5511
BrandPOP
HK$210.27
毎包:100 個
Bag(s)
M6 10.5mm 9.6mm 9.5mm 14.8mm Steel - Galvanised 2.5mm 0.8mm
RS庫存編號 667-9835
製造零件編號AVKALS3T-470-3.3
BrandAVK
HK$170.80
毎包:100 個
Bag(s)
M4 9.91mm 6.75mm 6.73mm 7.75mm - - Plain 3.3mm 2mm
RS庫存編號 623-5505
BrandPOP
HK$137.28
毎包:100 個
Bag(s)
M4 7mm 6.4mm 6.3mm 10.4mm Steel - Galvanised 1.5mm 0.5mm
RS庫存編號 623-5498
BrandPOP
HK$130.53
毎包:100 個
Bag(s)
M3 5.3mm 4.8mm 4.7mm 9mm Steel - Galvanised 1.5mm 0.5mm
RS庫存編號 194-304
BrandAVK
HK$229.05
毎包:50 個
Bag(s)
M8 17.4mm 13.5mm 13.46mm 11.94mm - - Plain 3.8mm 0.7mm
RS庫存編號 703-1281
製造零件編號34366040230
BrandBöllhoff
HK$342.28
毎包:100 個
Bag(s)
M4 - 6mm - - Stainless Steel - Plain - -
RS庫存編號 425-7581
製造零件編號34367040230
BrandBöllhoff
HK$155.92
毎批:100 個
Lot(s)
M4 6.7mm 6mm 9mm 11mm Steel - Plain 3mm 0.5mm
RS庫存編號 768-0748
BrandRS PRO
HK$232.58
毎包:50 個
Bag(s)
M6 15.88mm 11.43mm 11.13mm 23.34mm Steel - Bright Zinc Plated 9.53mm 4.75mm
RS庫存編號 623-5527
BrandPOP
HK$149.86
毎包:100 個
Bag(s)
M5 7.8mm 7.2mm 7.2mm 12mm Steel - Galvanised 2mm 0.5mm
RS庫存編號 194-326
BrandAVK
HK$274.44
毎包:100 個
Bag(s)
M6 12.7mm 10mm 9.91mm 9.65mm - - Plain 4.2mm 0.7mm
RS庫存編號 138-893
製造零件編號34367030020/01
BrandBöllhoff
HK$112.80
毎包:100 個
Bag(s)
M3 - 5mm - 7.9mm - - Plain - -
RS庫存編號 278-584
BrandRS PRO
HK$144.49
毎包:100 個
Bag(s)
M3 - 4mm 4.22mm 4.78mm Brass - - - 6.2mm
RS庫存編號 768-0732
BrandRS PRO
HK$195.40
毎包:50 個
Bag(s)
M5 13.49mm 10.16mm 9.7mm 18.19mm Steel - Bright Zinc Plated 4.75mm 0.38mm
RS庫存編號 425-7597
製造零件編號34367050230
BrandBöllhoff
HK$177.66
毎批:100 個
Lot(s)
M5 8mm 7mm 10mm 13mm Steel - Plain 3mm 0.5mm
RS庫存編號 664-7359
製造零件編號56000000080/01
BrandBöllhoff
HK$380.38
毎批:100 個
Lot(s)
M6 - - - 14mm Steel - Galvanised - -
RS庫存編號 623-5555
BrandPOP
HK$431.29
毎包:50 個
Bag(s)
M4 7mm 6mm 5.9mm 10mm Stainless Steel A4 316 Clear Passivated, Galvanised 3mm 0.5mm
RS庫存編號 278-556
BrandRS PRO
HK$126.53
毎包:100 個
Bag(s)
M4 - 5.6mm 5.64mm 7.95mm Brass - - - 10.2mm
RS庫存編號 425-7604
製造零件編號34367060230
BrandBöllhoff
HK$228.34
毎批:100 個
Lot(s)
M6 10mm 9mm 13mm 14mm Steel - Plain 3mm 0.5mm
RS庫存編號 278-607
BrandRS PRO
HK$186.93
毎包:100 個
Bag(s)
M4 - 5.6mm 5.64mm 7.95mm Brass - - - 9.4mm
RS庫存編號 278-578
BrandRS PRO
HK$222.74
毎包:100 個
Bag(s)
M6 - 8mm 8.26mm 12.7mm Brass - - - 16mm