How are o-rings measured?

O-rings are measured in millimeters. Place the O-ring on a clean, flat, level surface. Determine the inside diameter. Use a ruler or calipers to measure from one inner edge to another. To measure the outside diameter, use a ruler or calipers to measure from one outer corner of the O-ring to the other outer corner.

Are o-rings measured by OD or ID?

The best way to size an o-ring is by measuring the CS (cross-section) and ID (inside diameter). For measuring the cross-section, it is best to use a caliper, a.k.a. micrometer.

Are o-rings standard sizes?

There are two main o-ring sizing types: standard and metric. Standard was developed for use in the United States, while the international community uses metric sizes.

What size is a 222 o-ring?

Tech Specs

Size Code 222
Inside Diameter 1.484 in (37.69 mm)
Outside Diameter 1.762 in (44.75 mm)
Part Number V1081-222
Compound V1081 Material Datasheet

How do you choose an O-ring diameter?

O-Ring Size The size of an O-ring can be determined by measuring the diameters and the width of the cross-section. The measurement you will need to include are the internal diameter (ID), outside diameter (OD), and the cross-section width (CS).

What is a dash number for O-rings?

O-ring Size Chart

Dash Number Inches mm
ID CS
-001 0.029 1.02
-002 0.042 1.27
-003 0.056 1.53

What size is O ring in numbers?

US and EU sizes comparisons, accurate to within approximately 1/4 of a finger size….UK TO US RING SIZE CONVERSION CHART.

UK SIZE APPROX US SIZE APPROX EU SIZE
O 7 1/2 55 1/4
P 8 56 1/4
Q 8 1/2 57 1/2
R 8 3/4 58 1/2

How many mm is size O-ring?

17.53 55.1
To discover your ring size, simply measure the inside diameter of an existing fitting ring and check the measurement against our handy chart below….Ring Size Conversion Chart.

Inside diameter (mm) Inside circumference (mm) Ring size
17.12 53.8 N
17.53 55.1 O
17.93 56.3 P
18.34 57.6 Q

What size is a 211 O-ring?

211 Buna-N O-Ring, 70A Durometer, Black, 13/16″ ID, 1-1/16″ OD, 1/8″ Width (Pack of 100)