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. 178-721
BrandRS PRO
R 50.41
1 Bag of 50
Bag(s)
M4 4.1mm 6mm 3mm 8.2mm 1.5 mm Nylon
RS stock no. 178-658
BrandRS PRO
R 54.26
1 Bag of 50
Bag(s)
M3 3.1mm 4mm 2mm 6.2mm 1 mm Nylon
RS stock no. 178-664
BrandRS PRO
R 51.42
1 Bag of 50
Bag(s)
M3 3.1mm 4mm 3mm 6.2mm 1 mm Nylon
RS stock no. 178-771
BrandRS PRO
R 56.22
1 Bag of 50
Bag(s)
M5 5.1mm 7mm 3mm 10.2mm 2 mm Nylon
RS stock no. 178-822
BrandRS PRO
R 64.36
1 Bag of 50
Bag(s)
M6 6.1mm 8mm 4mm 12.2mm 2 mm Nylon
RS stock no. 178-670
BrandRS PRO
R 49.90
1 Bag of 50
Bag(s)
M3 3.1mm 4mm 4mm 6.2mm 1 mm Nylon
RS stock no. 178-715
BrandRS PRO
R 55.40
1 Bag of 50
Bag(s)
M3 3.1mm 4mm 8mm 6.2mm 1 mm Nylon
RS stock no. 203-1258
Mfr. Part No.CAJ010GFP
BrandSilfox
R 6.539
Each (In a Pack of 100)
units
- 2.8mm 3.6mm 2.5mm 6mm - PET
RS stock no. 178-850
BrandRS PRO
R 66.64
1 Bag of 50
Bag(s)
M6 6.1mm 8mm 12mm 12.2mm 2 mm Nylon
RS stock no. 178-866
BrandRS PRO
R 67.71
1 Bag of 50
Bag(s)
M8 8mm 10mm 4mm 14.2mm 2.5 mm Nylon
RS stock no. 178-636
BrandRS PRO
R 44.09
1 Bag of 50
Bag(s)
M2 2.1mm 3mm 3mm 4.2mm 1 mm Nylon
RS stock no. 203-1309
Mfr. Part No.CAJ007GFP
BrandSilfox
R 5.425
Each (In a Pack of 100)
units
- 3mm 3.8mm 3.3mm 6.1mm - PET
RS stock no. 178-844
BrandRS PRO
R 69.06
1 Bag of 50
Bag(s)
M6 6.1mm 8mm 8mm 12.2mm 2 mm Nylon
RS stock no. 178-692
BrandRS PRO
R 52.62
1 Bag of 50
Bag(s)
M3 3.1mm 4mm 6mm 6.2mm 1 mm Nylon
RS stock no. 178-894
BrandRS PRO
R 72.19
1 Bag of 50
Bag(s)
M8 8.1mm 10mm 12mm 14.2mm 2.5 mm Nylon
RS stock no. 203-1264
Mfr. Part No.CAJ006D
BrandSilfox
R 4.629
Each (In a Pack of 100)
units
- 3mm 3.5mm 0.6mm 5.9mm - PET
RS stock no. 178-838
BrandRS PRO
R 64.17
1 Bag of 50
Bag(s)
M6 6.1mm 8mm 6mm 12.2mm 2 mm Nylon
RS stock no. 203-1315
Mfr. Part No.CAJ008GFP
BrandSilfox
R 4.348
Each (In a Pack of 100)
units
- 3mm 3.8mm 0.6mm 6.1mm - PET
RS stock no. 178-686
BrandRS PRO
R 53.56
1 Bag of 50
Bag(s)
M3 3.1mm 4mm 5mm 6.2mm 1 mm Nylon
RS stock no. 203-1270
Mfr. Part No.CAJ003N
BrandSilfox
R 5.437
Each (In a Pack of 100)
units
- 2.8mm 3.6mm 2.5mm 6mm - Nylon