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Solid Ceramic

Flat Washers - U.S. Inch  | → Metric | → British

stock ceramic flat washer - MetricU.S. inch flat washers Our solid ceramic fasteners are ISO 9001-2015 production systems certified and ideally suited for applications requiring non-conductive, high insulating properties and chemical resistance.

US made. Shipping from our fastener inventory, Monday - Friday.

No Free Samples

*Available sizes, compositions and lengths vary and may be dependent upon material properties and performance characteristics. Please check our website for the most up-to-date information.

U.S. inch flat washer dimensional reference

To order fasteners:find the correct size, then select the composition you require.

    A B C
Size Com­posi­tion Inside Diam­eter Outside Diam­eter Thickness
#0 alumina .063 - .068 .183 - .188 .022 - .028
zirconia
#2 alumina .089 - .094 .245 - .250 .028 - .036
zirconia
#4 alumina .120 - .133 .370 - .383 .036 - .045
zirconia
#5 alumina .136 - .149 .401 - .414 .036 - .045
zirconia
#6 alumina .151 - .164 .433 - .446 .036 - .045
zirconia
#8 alumina .183 - .196 .495 - .508 .036 - .045
zirconia
#10 alumina .198 - .211 .557 - .570 .036 - .045
zirconia
#12 alumina .229 - .242 .620 - .640 .056 - .071
zirconia
1/4" alumina .276 - 296 .727 - .749 .056 - .071
zirconia
5/16" alumina .339 - .359 .868 - .890 .056 - .071
zirconia
3/8" alumina .401 - .421 .993 - 1.015 .056 - .071
zirconia
7/16" alumina .464 - .484 1.118 - 1.140 .056 - .071
zirconia
1/2" alumina .526 - .546 1.243 - 1.280 .090 - .112
zirconia
9/16" alumina .589 - .609 1.462 - 1.499 .090 - .112
zirconia
5/8" alumina .649 - .686 1.743 - 1.780 .090 - .112
zirconia
3/4" alumina .805 - .842 1.993 - 2.030 .090 - .112
zirconia
7/8" alumina .931 - .968 2.243 - 2.280 .146 - .174
zirconia
1.0" alumina 1.055 - 1.092 2.493 - 2.530 .146 - .174
zirconia

Dimensions Per ANSI B18.6.3-1972 (R1991) Standard

Important Information -Please Read

Alumina & zirconia (PSZ) fasteners

  1. The pitch diameter of male threads will not exceed the max allowable according to Class 2. Minimum allowable pitch diameter may be below that of Class 2, conversely for female threads. Due to shrink factor variances, the stack up tolerance cannot be controlled on the pitch. It is recommended that you not engage more than 5 to 10 threads on any male fastener.
  2. No warranty with respect to torque strength and tensile strength is extended or implied. Ceramic materials are inherently brittle and display catastrophic failure if impacted or stressed beyond material limits.

Heat Resistant Corrosion Resistant Non-conductive Non Out-Gassing

Stock ceramic fasteners from Ceramco, Inc. Specializing in custom ceramic parts of complex geometries. Learn More.

Immediate Assistance is only a phone call away. If you have any questions or require additional information, please call Ceramco at: +1 (603) 447-2090, Monday - Friday, 8:00 am - 4:30 pm, U.S. Eastern.