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. 178-838
BrandRS PRO
$8.25
1 Bag of 50
Bag(s)
M6 6.1mm 8mm 6mm 12.2mm 2 mm Nylon
RS Stock No. 178-721
BrandRS PRO
$6.83
1 Bag of 50
Bag(s)
M4 4.1mm 6mm 3mm 8.2mm 1.5 mm Nylon
RS Stock No. 178-894
BrandRS PRO
$6.61
1 Bag of 50
Bag(s)
M8 8.1mm 10mm 12mm 14.2mm 2.5 mm Nylon
RS Stock No. 178-771
BrandRS PRO
$7.30
1 Bag of 50
Bag(s)
M5 5.1mm 7mm 3mm 10.2mm 2 mm Nylon
RS Stock No. 178-866
BrandRS PRO
$8.87
1 Bag of 50
Bag(s)
M8 8mm 10mm 4mm 14.2mm 2.5 mm Nylon
RS Stock No. 178-787
BrandRS PRO
$9.96
1 Bag of 50
Bag(s)
M5 5.1mm 7mm 4mm 10.2mm 2 mm Nylon
RS Stock No. 178-793
BrandRS PRO
$5.42
1 Bag of 50
Bag(s)
M5 5.1mm 7mm 5mm 10.2mm 2 mm Nylon
RS Stock No. 178-844
BrandRS PRO
$9.46
1 Bag of 50
Bag(s)
M6 6.1mm 8mm 8mm 12.2mm 2 mm Nylon
RS Stock No. 178-658
BrandRS PRO
$7.04
1 Bag of 50
Bag(s)
M3 3.1mm 4mm 2mm 6.2mm 1 mm Nylon
RS Stock No. 178-664
BrandRS PRO
$8.42
1 Bag of 50
Bag(s)
M3 3.1mm 4mm 3mm 6.2mm 1 mm Nylon
RS Stock No. 178-686
BrandRS PRO
$7.99
1 Bag of 50
Bag(s)
M3 3.1mm 4mm 5mm 6.2mm 1 mm Nylon
RS Stock No. 178-715
BrandRS PRO
$7.43
1 Bag of 50
Bag(s)
M3 3.1mm 4mm 8mm 6.2mm 1 mm Nylon
RS Stock No. 178-692
BrandRS PRO
$7.55
1 Bag of 50
Bag(s)
M3 3.1mm 4mm 6mm 6.2mm 1 mm Nylon
RS Stock No. 178-759
BrandRS PRO
$6.72
1 Bag of 50
Bag(s)
M4 4.1mm 6mm 7mm 8.2mm 1.5 mm Nylon
RS Stock No. 178-816
BrandRS PRO
$9.61
1 Bag of 50
Bag(s)
M5 5.1mm 7mm 9mm 10.2mm 2 mm Nylon
RS Stock No. 178-737
BrandRS PRO
$8.54
1 Bag of 50
Bag(s)
M4 4.1mm 6mm 4mm 8.2mm 1.5 mm Nylon
RS Stock No. 178-636
BrandRS PRO
$6.48
1 Bag of 50
Bag(s)
M2 2.1mm 3mm 3mm 4.2mm 1 mm Nylon
RS Stock No. 178-765
BrandRS PRO
$6.66
1 Bag of 50
Bag(s)
M4 4.1mm 6mm 9mm 8.2mm 1.5 mm Nylon
RS Stock No. 178-888
BrandRS PRO
$11.98
1 Bag of 50
Bag(s)
M8 8.1mm 10mm 8mm 14.2mm 2.5 mm Nylon
RS Stock No. 178-872
BrandRS PRO
$7.63
1 Bag of 50
Bag(s)
M8 8.1mm 10mm 6mm 14.2mm 2.5 mm Nylon