Inch Size Alumina Shoulder Washers

Inch size Alumina shoulder washers (also called ceramic hat washers) electrically help to isolate components from one another. For instance, you can isolate one sample holder from another sample holder . Available in standard screw sizes. Made from 99.7%+ Al2O3 (alumina), these non-porous washers are fully vacuum compatible and bakable to over 400oC.

Can't find the exact size or shape you need? Please fill out our Custom Size Quote Form or call us at (650) 851-1859. We welcome custom product and fabrication projects.
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Item #

Item Name

Screw Size

(A) Large Diameter

(B) Small Diameter

(C) Small Diameter Thickness

(D) Total Thickness

(H) Inner Diameter

Material Purity

11052-1010

Alumina Washer Shoulder for # 0 Screw

0

1/4

0.154

0.030

0.062

0.060

Alumina Oxide Ceramic (Al2O3) 99.7% Pure (AD 997)

11052-1020

Alumina Washer Shoulder for # 1 screw

1

1/4

0.154

0.030

0.062

0.073

Alumina Oxide Ceramic (Al2O3) 99.7% Pure (AD 997)

11052-1030

Alumina Washer Shoulder for # 2 Screw

2

0.281

0.169

0.030

0.078

0.086

Alumina Oxide Ceramic (Al2O3) 99.7% Pure (AD 997)

11052-1040

Alumina Washer Shoulder for # 4 Screw

4

0.354

0.249

0.030

0.078

0.112

Alumina Oxide Ceramic (Al2O3) 99.7% Pure (AD 997)

11052-1050

Alumina Washer Shoulder for # 5 Screw

5

0.440

0.279

0.046

0.093

0.125

Alumina Oxide Ceramic (Al2O3) 99.7% Pure (AD 997)

11052-1060

Alumina Washer Shoulder for # 6 Screw

6

0.468

0.310

0.046

0.093

0.138

Alumina Oxide Ceramic (Al2O3) 99.7% Pure (AD 997)

11052-1070

Alumina Washer Shoulder for # 8 Screw

8

1/2

0.341

0.062

0.125

0.164

Alumina Oxide Ceramic (Al2O3) 99.7% Pure (AD 997)

11052-1080

Alumina Washer Shoulder for #10 Screw

10

0.562

0.373

0.062

0.125

0.190

Alumina Oxide Ceramic (Al2O3) 99.7% Pure (AD 997)