O-Ring Washers | McMaster-Carr

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System of Measurement

ID

Width

OD

Cross Section Shape

Material

Stainless Steel

Dash Number

Color

Hardness Rating

For Use With

Diluted Salt Solutions

Fluorinated Solvents

Liquid Insecticides

Synthetic Lubricants

Transmission Fluid

Acetic Acid (White Vinegar)

Maximum Temperature

Less than 250° F

250° F to 299° F

300° F to 399° F

400° F to 499° F

500° F or greater

Core Material

Silicone Rubber

Viton® Fluoroelastomer

Fractional Width

Fractional ID

Screw Size

Fractional OD

Minimum Temperature

-250° F or less

-249° F to -100° F

-99° F to -50° F

-49° F to -1° F

Greater than 0° F

Thickness

0.018" to 0.025"

0.019" to 0.043"

0.021" to 0.041"

0.024" to 0.038"

0.026" to 0.036"

0.033" to 0.047"

0.035" to 0.045"

0.035" to 0.070"

0.036" to 0.044"

0.036" to 0.056"

0.042" to 0.052"

0.043" to 0.057"

0.045" to 0.055"

0.046" to 0.078"

0.047" to 0.077"

0.047" to 0.109"

Specifications Met

REACH

RoHS

Compliant with Exemptions

DFARS Specialty Metals

Export Control Classification Number (ECCN)

Environment

Food and Beverage

Food Industry Standard

3-A Sanitary Standard

How can we improve?

12,737 Products

Fastening and Joining

Sealing Washers

Sealing Washers

Prevent fluids from leaking around fasteners

Sealing

O-Rings

Fit snugly into a groove between parts to create a leak-resistant seal

11,405 products

Backup Rings

Extend the life of O-rings and improve their performance under high pressure

O-Ring Bonding Kits

O-Ring Bonding Kits

Everything needed to make O-rings

O-Ring Cord Stock

O-Ring Cord Stock

Cut to length to create customized seals

Fluid Handling

Tube Fitting Rings

Tube Fitting Rings

Prevent leaks at tubing connection points

Measuring and Inspecting

O-Ring Gauges

Identify the size of your O-ring

Electrical

Electrical Enclosure Fasteners

Electrical Enclosure Fasteners

Mount components to your enclosure without worrying about leaks

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)