Screw Insulators

A screw insulator can also be known as a shoulder washer.

The screw insulator is designed to insulate screws, rivets or wire from an assembly.

Features and Benefits of a screw insulator

• Thermally insulate a screw from making metal to metal contact
• Reduce Vibration
• Act as Spacers and Guides
• Are Strong and Corrosion Resistant
• Can be Used as Seal in Some Applications

Why and when to use a screw insulator?

Screw insulators can be inserted into a housing to provide a bearing surface for rotary applications.
The flange on the screw insulator is used to locate the bushing when it is installed or to provide a thrust bearing surface.
Screw Insulators are used to prevent heat flow through the screw to other parts of the thermal assembly.

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Description Price For Screw Size Inside Diameter Body Outside Diameter Body Length Flange Diameter Flange Thickness Material
RS Stock No. 178-636
BrandRS PRO
TWD124.00
1 Bag of 50
Bag(s)
M2 2.1mm 3mm 3mm 4.2mm 1 mm Nylon
RS Stock No. 178-844
BrandRS PRO
TWD180.00
1 Bag of 50
Bag(s)
M6 6.1mm 8mm 8mm 12.2mm 2 mm Nylon
RS Stock No. 178-888
BrandRS PRO
TWD160.00
1 Bag of 50
Bag(s)
M8 8.1mm 10mm 8mm 14.2mm 2.5 mm Nylon
RS Stock No. 203-1264
Mfr. Part No.CAJ006D
BrandSilfox
TWD10.60
Each (In a Pack of 100)
units
- 3mm 3.5mm 0.6mm 5.9mm - PET
RS Stock No. 178-670
BrandRS PRO
TWD121.00
1 Bag of 50
Bag(s)
M3 3.1mm 4mm 4mm 6.2mm 1 mm Nylon
RS Stock No. 203-1309
Mfr. Part No.CAJ007GFP
BrandSilfox
TWD12.30
Each (In a Pack of 100)
units
- 3mm 3.8mm 3.3mm 6.1mm - PET
RS Stock No. 178-787
BrandRS PRO
TWD135.00
1 Bag of 50
Bag(s)
M5 5.1mm 7mm 4mm 10.2mm 2 mm Nylon
RS Stock No. 178-765
BrandRS PRO
TWD131.00
1 Bag of 50
Bag(s)
M4 4.1mm 6mm 9mm 8.2mm 1.5 mm Nylon
RS Stock No. 178-743
BrandRS PRO
TWD139.00
1 Bag of 50
Bag(s)
M4 4.1mm 6mm 5mm 8.2mm 1.5 mm Nylon
RS Stock No. 178-866
BrandRS PRO
TWD144.00
1 Bag of 50
Bag(s)
M8 8mm 10mm 4mm 14.2mm 2.5 mm Nylon
RS Stock No. 178-771
BrandRS PRO
TWD135.00
1 Bag of 50
Bag(s)
M5 5.1mm 7mm 3mm 10.2mm 2 mm Nylon
RS Stock No. 178-800
BrandRS PRO
TWD138.00
1 Bag of 50
Bag(s)
M5 5.1mm 7mm 7mm 10.2mm 2 mm Nylon
RS Stock No. 178-838
BrandRS PRO
TWD153.00
1 Bag of 50
Bag(s)
M6 6.1mm 8mm 6mm 12.2mm 2 mm Nylon
RS Stock No. 203-1270
Mfr. Part No.CAJ003N
BrandSilfox
TWD12.40
Each (In a Pack of 100)
units
- 2.8mm 3.6mm 2.5mm 6mm - Nylon
RS Stock No. 178-737
BrandRS PRO
TWD121.00
1 Bag of 50
Bag(s)
M4 4.1mm 6mm 4mm 8.2mm 1.5 mm Nylon
RS Stock No. 178-686
BrandRS PRO
TWD121.00
1 Bag of 50
Bag(s)
M3 3.1mm 4mm 5mm 6.2mm 1 mm Nylon
RS Stock No. 178-759
BrandRS PRO
TWD130.00
1 Bag of 50
Bag(s)
M4 4.1mm 6mm 7mm 8.2mm 1.5 mm Nylon
RS Stock No. 178-793
BrandRS PRO
TWD143.00
1 Bag of 50
Bag(s)
M5 5.1mm 7mm 5mm 10.2mm 2 mm Nylon
RS Stock No. 178-692
BrandRS PRO
TWD121.00
1 Bag of 50
Bag(s)
M3 3.1mm 4mm 6mm 6.2mm 1 mm Nylon
RS Stock No. 203-1258
Mfr. Part No.CAJ010GFP
BrandSilfox
TWD12.40
Each (In a Pack of 100)
units
- 2.8mm 3.6mm 2.5mm 6mm - PET