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Insulating Cup Washers

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Cupped Washers, also known as Insulator Washers, are designed to protect the head of a metal screw from electrical contact.

Our Cup Washer range is made from Nylon 6/6 that benefits from a UL94 V2 flame rating, as well as being corrosion resistant, and have resistance against oil and most chemicals.

This insulator washer range can accommodate the most common screw head styles, including; Cheese, Pan and Fillister.

  • Color: Natural

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Product SKUs information
Item Code Price range Availability Height Bore Diameter Inside Diameter Bore Depth Outside Diameter Buy
16CW006040
$0.0482 - $0.0562 50000 In stock
4.6 mm
7.6 mm
3.6 mm
3.6 mm
9.1 mm
16CW008040
$0.0585 - $0.0682 38000 In stock
5.2 mm
9.0 mm
4.3 mm
4.2 mm
10.5 mm
16CW008042
$0.0365 - $0.0426 2500 In stock
3.5 mm
9.9 mm
4.7 mm
2.4 mm
12.6 mm
16CW008041
$0.0915 - $0.1068 In production
4.3 mm
9.0 mm
4.4 mm
3.3 mm
10.5 mm
16CW008043
$0.0359 - $0.0418 In production
5.5 mm
7.1 mm
4.4 mm
4.6 mm
8.7 mm
16CW010030
$0.0612 - $0.0713 188000 In stock
4.0 mm
9.5 mm
5.1 mm
3.2 mm
14.4 mm
16CW010040
$0.0607 - $0.0707 64600 In stock
5.8 mm
10.4 mm
4.9 mm
4.8 mm
11.9 mm
16CW250250
$0.4601 - $1.111 500 In stock
5.0 mm
12.7 mm
6.6 mm
3.8 mm
25.4 mm
16CW250040
$0.0583 - $0.1406 12400 In stock
7.3 mm
13.6 mm
6.5 mm
6.3 mm
15.1 mm
16CW250042
$0.0928 - $0.1082 32000 In stock
20.0 mm
11.8 mm
6.5 mm
16.5 mm
13.5 mm
16CW312050
$0.0333 - $0.0388 27000 In stock
4.3 mm
10.2 mm
8.1 mm
3.1 mm
12.7 mm
16CW312375
$0.0829 - $0.2003 5000 In stock
9.5 mm
15.9 mm
8.7 mm
6.4 mm
22.2 mm
16CW312500
$0.1218 - $0.294 17500 In stock
12.7 mm
15.9 mm
8.7 mm
9.6 mm
22.2 mm
16CW375225
$0.1557 - $0.3761 2000 In stock
5.7 mm
19.1 mm
9.7 mm
3.2 mm
25.4 mm
16CW437520
$0.3289 - $0.7942 750 In stock
13.5 mm
20 mm
11.1 mm
5 mm
27.8 mm
16CW004257
$0.0355 - $0.0413 In production
6.5 mm
6.2 mm
2.9 mm
5.5 mm
7.7 mm
16CW004040
$0.0459 - $0.0536 18000 In stock
3.9 mm
6.2 mm
2.9 mm
2.97 mm
7.7 mm
Natural Nylon Finishing Washer - Bore Depth 3.6 mm | 0.142 in; Inside Diameter 3.6 mm | 0.142 in

16CW006040

Price Range
$0.0562 - $0.0482

Stock Levels
50000 In stock
Attributes
  • Bore Depth
    3.6 mm
  • Bore Diameter
    7.6 mm
  • Inside Diameter
    3.6 mm
  • Outside Diameter
    9.1 mm
  • Color
    Natural
Natural Nylon Finishing Washer - Bore Depth 4.2 mm | 0.165 in; Inside Diameter 4.3 mm | 0.169 in

16CW008040

Price Range
$0.0682 - $0.0585

Stock Levels
38000 In stock
Attributes
  • Bore Depth
    4.2 mm
  • Bore Diameter
    9.0 mm
  • Inside Diameter
    4.3 mm
  • Outside Diameter
    10.5 mm
  • Color
    Natural
Natural Nylon Finishing Washer - Bore Depth 2.4 mm | 0.094 in; Inside Diameter 4.7 mm | 0.185 in

16CW008042

Price Range
$0.0426 - $0.0365

Stock Levels
2500 In stock
Attributes
  • Bore Depth
    2.4 mm
  • Bore Diameter
    9.9 mm
  • Inside Diameter
    4.7 mm
  • Outside Diameter
    12.6 mm
  • Color
    Natural
Natural Nylon Finishing Washer - Bore Depth 3.3 mm | 0.13 in; Inside Diameter 4.4 mm | 0.173 in

16CW008041

Price Range
$0.1068 - $0.0915

Stock Levels
In production
Attributes
  • Bore Depth
    3.3 mm
  • Bore Diameter
    9.0 mm
  • Inside Diameter
    4.4 mm
  • Outside Diameter
    10.5 mm
  • Color
    Natural
Natural Nylon Finishing Washer - Bore Depth 4.6 mm | 0.181 in; Inside Diameter 4.4 mm | 0.173 in

16CW008043

Price Range
$0.0418 - $0.0359

Stock Levels
In production
Attributes
  • Bore Depth
    4.6 mm
  • Bore Diameter
    7.1 mm
  • Inside Diameter
    4.4 mm
  • Outside Diameter
    8.7 mm
  • Color
    Natural
Natural Nylon Finishing Washer - Bore Depth 3.2 mm | 0.126 in; Inside Diameter 5.1 mm | 0.201 in

16CW010030

Price Range
$0.0713 - $0.0612

Stock Levels
188000 In stock
Attributes
  • Bore Depth
    3.2 mm
  • Bore Diameter
    9.5 mm
  • Inside Diameter
    5.1 mm
  • Outside Diameter
    14.4 mm
  • Color
    Natural
Natural Nylon Finishing Washer - Bore Depth 4.8 mm | 0.189 in; Inside Diameter 4.9 mm | 0.193 in

16CW010040

Price Range
$0.0707 - $0.0607

Stock Levels
64600 In stock
Attributes
  • Bore Depth
    4.8 mm
  • Bore Diameter
    10.4 mm
  • Inside Diameter
    4.9 mm
  • Outside Diameter
    11.9 mm
  • Color
    Natural
Natural Nylon Finishing Washer - Bore Depth 3.8 mm | 0.15 in; Inside Diameter 6.6 mm | 0.26 in

16CW250250

Price Range
$1.111 - $0.4601

Stock Levels
500 In stock
Attributes
  • Bore Depth
    3.8 mm
  • Bore Diameter
    12.7 mm
  • Inside Diameter
    6.6 mm
  • Outside Diameter
    25.4 mm
  • Color
    Natural
Natural Nylon Cap Washer - Bore Depth 6.3 mm | 0.247 in; Inside Diameter 6.5 mm | 0.257 in

16CW250040

Price Range
$0.1406 - $0.0583

Stock Levels
12400 In stock
Attributes
  • Bore Depth
    6.3 mm
  • Bore Diameter
    13.6 mm
  • Inside Diameter
    6.5 mm
  • Outside Diameter
    15.1 mm
  • Color
    Natural
Natural Nylon Finishing Washer - Bore Depth 16.5 mm | 0.65 in; Inside Diameter 6.5 mm | 0.256 in

16CW250042

Price Range
$0.1082 - $0.0928

Stock Levels
32000 In stock
Attributes
  • Bore Depth
    16.5 mm
  • Bore Diameter
    11.8 mm
  • Inside Diameter
    6.5 mm
  • Outside Diameter
    13.5 mm
  • Color
    Natural
Natural Nylon Finishing Washer - Bore Depth 3.1 mm | 0.122 in; Inside Diameter 8.1 mm | 0.319 in

16CW312050

Price Range
$0.0388 - $0.0333

Stock Levels
27000 In stock
Attributes
  • Bore Depth
    3.1 mm
  • Bore Diameter
    10.2 mm
  • Inside Diameter
    8.1 mm
  • Outside Diameter
    12.7 mm
  • Color
    Natural
Natural Nylon Cap Washer - Bore Depth 6.4 mm | 0.250 in; Inside Diameter 8.7 mm | 0.344 in

16CW312375

Price Range
$0.2003 - $0.0829

Stock Levels
5000 In stock
Attributes
  • Bore Depth
    6.4 mm
  • Bore Diameter
    15.9 mm
  • Inside Diameter
    8.7 mm
  • Outside Diameter
    22.2 mm
  • Color
    Natural
Natural Nylon Finishing Washer - Bore Depth 9.6 mm | 0.378 in; Inside Diameter 8.7 mm | 0.343 in

16CW312500

Price Range
$0.294 - $0.1218

Stock Levels
17500 In stock
Attributes
  • Bore Depth
    9.6 mm
  • Bore Diameter
    15.9 mm
  • Inside Diameter
    8.7 mm
  • Outside Diameter
    22.2 mm
  • Color
    Natural
Natural Nylon Finishing Washer - Bore Depth 3.2 mm | 0.126 in; Inside Diameter 9.7 mm | 0.382 in

16CW375225

Price Range
$0.3761 - $0.1557

Stock Levels
2000 In stock
Attributes
  • Bore Depth
    3.2 mm
  • Bore Diameter
    19.1 mm
  • Inside Diameter
    9.7 mm
  • Outside Diameter
    25.4 mm
  • Color
    Natural
Natural Nylon Cap Washer - Bore Depth 5 mm | 0.196 in; Inside Diameter 11.1 mm | 0.437 in

16CW437520

Price Range
$0.7942 - $0.3289

Stock Levels
750 In stock
Attributes
  • Bore Depth
    5 mm
  • Bore Diameter
    20 mm
  • Inside Diameter
    11.1 mm
  • Outside Diameter
    27.8 mm
  • Color
    Natural
Natural Nylon Finishing Washer - Bore Depth 5.5 mm | 0.217 in; Inside Diameter 2.9 mm | 0.114 in

16CW004257

Price Range
$0.0413 - $0.0355

Stock Levels
In production
Attributes
  • Bore Depth
    5.5 mm
  • Bore Diameter
    6.2 mm
  • Inside Diameter
    2.9 mm
  • Outside Diameter
    7.7 mm
  • Color
    Natural
Natural Nylon Finishing Washer - Bore Depth 2.97 mm | 0.117 in; Inside Diameter 2.9 mm | 0.114 in

16CW004040

Price Range
$0.0536 - $0.0459

Stock Levels
18000 In stock
Attributes
  • Bore Depth
    2.97 mm
  • Bore Diameter
    6.2 mm
  • Inside Diameter
    2.9 mm
  • Outside Diameter
    7.7 mm
  • Color
    Natural