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Imperial Oil Seals
Bearings Oil Seals & O-rings Oil Seals
We offer a comprehensive range of imperial nitrile covered rotary shaft oil seals suitable for a variety of industrial applications. With single lip seals available in R21 and R23 types, and sizes from 1/4" up to 8 1/4" inside diameter, we have the oil seals you need for bearing and shaft protection. All seals feature nitrile rubber construction for durability, with press fit installation. Browse our catalog of over 600 oil seals by inside diameter, outside diameter, width, or type to find the perfect fit. Trust us as your supplier for high quality imperial oil seals.
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O-ring Cord
Imperial Ball Bearings
SKF Ball Bearings
Inside Diameter
80.77mm = 3.18inch
80.77mm = 3.18inch
Material
Nitrile
Nitrile
Outside Diameter
107.95mm = 4.25(4.1/4)inch
107.95mm = 4.25(4.1/4)inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
87.12mm = 3.43inch
87.12mm = 3.43inch
Material
Nitrile
Nitrile
Outside Diameter
107.95mm = 4.25(4.1/4)inch
107.95mm = 4.25(4.1/4)inch
Type
R21
R21
Width
9.4mm = 0.37inch
9.4mm = 0.37inch
Inside Diameter
76.2mm = 3inch
76.2mm = 3inch
Material
Nitrile
Nitrile
Outside Diameter
114.3mm = 4.5(4.1/2)inch
114.3mm = 4.5(4.1/2)inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
82.55mm = 3.25(3.1/4)inch
82.55mm = 3.25(3.1/4)inch
Material
Nitrile
Nitrile
Outside Diameter
114.3mm = 4.5(4.1/2)inch
114.3mm = 4.5(4.1/2)inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
82.55mm = 3.25(3.1/4)inch
82.55mm = 3.25(3.1/4)inch
Material
Nitrile
Nitrile
Outside Diameter
114.3mm = 4.5(4.1/2)inch
114.3mm = 4.5(4.1/2)inch
Type
R23
R23
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
88.9mm = 3.5(3.1/2)inch
88.9mm = 3.5(3.1/2)inch
Material
Nitrile
Nitrile
Outside Diameter
120.65mm = 4.75(4.3/4)inch
120.65mm = 4.75(4.3/4)inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
91.95mm = 3.62inch
91.95mm = 3.62inch
Material
Nitrile
Nitrile
Outside Diameter
120.65mm = 4.75(4.3/4)inch
120.65mm = 4.75(4.3/4)inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
91.95mm = 3.62inch
91.95mm = 3.62inch
Material
Nitrile
Nitrile
Outside Diameter
127mm = 5inch
127mm = 5inch
Type
R23
R23
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
104.65mm = 4.12inch
104.65mm = 4.12inch
Material
Nitrile
Nitrile
Outside Diameter
130.05mm = 5.12inch
130.05mm = 5.12inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
101.6mm = 4inch
101.6mm = 4inch
Material
Nitrile
Nitrile
Outside Diameter
133.35mm = 5.25(5.1/4)inch
133.35mm = 5.25(5.1/4)inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
88.9mm = 3.5(3.1/2)inch
88.9mm = 3.5(3.1/2)inch
Material
Nitrile
Nitrile
Outside Diameter
136.4mm = 5.37inch
136.4mm = 5.37inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
101.6mm = 4inch
101.6mm = 4inch
Material
Nitrile
Nitrile
Outside Diameter
136.4mm = 5.37inch
136.4mm = 5.37inch
Type
R23
R23
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
107.95mm = 4.25(4.1/4)inch
107.95mm = 4.25(4.1/4)inch
Material
Nitrile
Nitrile
Outside Diameter
136.4mm = 5.37inch
136.4mm = 5.37inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
110.998mm = 4.37inch
110.998mm = 4.37inch
Material
Nitrile
Nitrile
Outside Diameter
139.7mm = 5.5(5.1/2)inch
139.7mm = 5.5(5.1/2)inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
107.95mm = 4.25(4.1/4)inch
107.95mm = 4.25(4.1/4)inch
Material
Nitrile
Nitrile
Outside Diameter
146.05mm = 5.75(5.3/4)inch
146.05mm = 5.75(5.3/4)inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
127mm = 5inch
127mm = 5inch
Material
Nitrile
Nitrile
Outside Diameter
152.4mm = 6inch
152.4mm = 6inch
Type
R23
R23
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
133.35mm = 5.25(5.1/4)inch
133.35mm = 5.25(5.1/4)inch
Material
Nitrile
Nitrile
Outside Diameter
158.75mm = 6.25(6.1/4)inch
158.75mm = 6.25(6.1/4)inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
139.7mm = 5.5(5.1/2)inch
139.7mm = 5.5(5.1/2)inch
Material
Nitrile
Nitrile
Outside Diameter
158.75mm = 6.25(6.1/4)inch
158.75mm = 6.25(6.1/4)inch
Type
R21
R21
Width
14.22mm = 0.56inch
14.22mm = 0.56inch
Inside Diameter
158.75mm = 6.25(6.1/4)inch
158.75mm = 6.25(6.1/4)inch
Material
Nitrile
Nitrile
Outside Diameter
184.15mm = 7.25inch
184.15mm = 7.25inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
146.05mm = 5.75(5.3/4)inch
146.05mm = 5.75(5.3/4)inch
Material
Nitrile
Nitrile
Outside Diameter
190.5mm = 7.5inch
190.5mm = 7.5inch
Type
R21
R21
Width
14.22mm = 0.56inch
14.22mm = 0.56inch
Inside Diameter
168.15mm = 6.62inch
168.15mm = 6.62inch
Material
Nitrile
Nitrile
Outside Diameter
193.55mm = 7.62inch
193.55mm = 7.62inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
171.45mm = 6.75(6.3/4)inch
171.45mm = 6.75(6.3/4)inch
Material
Nitrile
Nitrile
Outside Diameter
196.85mm = 7.75inch
196.85mm = 7.75inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
171.45mm = 6.75(6.3/4)inch
171.45mm = 6.75(6.3/4)inch
Material
Nitrile
Nitrile
Outside Diameter
209.55mm = 8.25inch
209.55mm = 8.25inch
Type
R21
R21
Width
19.05mm = 0.75(3/4)inch
19.05mm = 0.75(3/4)inch
Inside Diameter
177.8mm = 7inch
177.8mm = 7inch
Material
Nitrile
Nitrile
Outside Diameter
215.9mm = 8.5inch
215.9mm = 8.5inch
Type
R23
R23
Width
19.05mm = 0.75(3/4)inch
19.05mm = 0.75(3/4)inch
Inside Diameter
184.15mm = 7.25inch
184.15mm = 7.25inch
Material
Nitrile
Nitrile
Outside Diameter
215.9mm = 8.5inch
215.9mm = 8.5inch
Type
R21
R21
Width
19.05mm = 0.75(3/4)inch
19.05mm = 0.75(3/4)inch
Inside Diameter
184.15mm = 7.25inch
184.15mm = 7.25inch
Material
Nitrile
Nitrile
Outside Diameter
228.6mm = 9inch
228.6mm = 9inch
Type
R21
R21
Width
19.05mm = 0.75(3/4)inch
19.05mm = 0.75(3/4)inch
Inside Diameter
190.5mm = 7.5inch
190.5mm = 7.5inch
Material
Nitrile
Nitrile
Outside Diameter
228.6mm = 9inch
228.6mm = 9inch
Type
R23
R23
Width
19.05mm = 0.75(3/4)inch
19.05mm = 0.75(3/4)inch
Inside Diameter
206.25mm = 8.12inch
206.25mm = 8.12inch
Material
Nitrile
Nitrile
Outside Diameter
244.35mm = 9.62inch
244.35mm = 9.62inch
Type
R21
R21
Width
14.22mm = 0.56inch
14.22mm = 0.56inch
Inside Diameter
209.55mm = 8.25inch
209.55mm = 8.25inch
Material
Nitrile
Nitrile
Outside Diameter
247.65mm = 9.75inch
247.65mm = 9.75inch
Type
R21
R21
Width
14.22mm = 0.56inch
14.22mm = 0.56inch
Inside Diameter
28.45mm = 1.12inch
28.45mm = 1.12inch
Material
Nitrile
Nitrile
Outside Diameter
53.85mm = 2.12inch
53.85mm = 2.12inch
Type
R21
R21
Width
7.87mm = 0.31inch
7.87mm = 0.31inch
Inside Diameter
69.85mm = 2.75(2.3/4)inch
69.85mm = 2.75(2.3/4)inch
Material
Nitrile
Nitrile
Outside Diameter
88.9mm = 3.5(3.1/2)inch
88.9mm = 3.5(3.1/2)inch
Type
R21
R21
Width
9.4mm = 0.37inch
9.4mm = 0.37inch
Inside Diameter
57.15mm = 2.25(2.1/4)inch
57.15mm = 2.25(2.1/4)inch
Material
Nitrile
Nitrile
Outside Diameter
88.9mm = 3.5(3.1/2)inch
88.9mm = 3.5(3.1/2)inch
Type
R23
R23
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
31.75mm = 1.25(1.1/4)inch
31.75mm = 1.25(1.1/4)inch
Material
Nitrile
Nitrile
Outside Diameter
57.15mm = 2.25(2.1/4)inch
57.15mm = 2.25(2.1/4)inch
Type
R21
R21
Width
9.4mm = 0.37inch
9.4mm = 0.37inch
Inside Diameter
19.05mm = 0.75(3/4)inch
19.05mm = 0.75(3/4)inch
Material
Nitrile
Nitrile
Outside Diameter
31.75mm = 1.25(1.1/4)inch
31.75mm = 1.25(1.1/4)inch
Type
R21
R21
Width
6.35mm = 0.25(1/4)inch
6.35mm = 0.25(1/4)inch
Inside Diameter
52.32mm = 2.06inch
52.32mm = 2.06inch
Material
Nitrile
Nitrile
Outside Diameter
80.77mm = 3.18inch
80.77mm = 3.18inch
Type
R21
R21
Width
11.43mm = 0.45inch
11.43mm = 0.45inch
Inside Diameter
14.22mm = 0.56inch
14.22mm = 0.56inch
Material
Nitrile
Nitrile
Outside Diameter
25.4mm = 1inch
25.4mm = 1inch
Type
R21
R21
Width
6.35mm = 0.25(1/4)inch
6.35mm = 0.25(1/4)inch
Inside Diameter
25.4mm = 1inch
25.4mm = 1inch
Material
Nitrile
Nitrile
Outside Diameter
50.8mm = 2inch
50.8mm = 2inch
Type
R23
R23
Width
9.4mm = 0.37inch
9.4mm = 0.37inch
Inside Diameter
39.62mm = 1.56inch
39.62mm = 1.56inch
Material
Nitrile
Nitrile
Outside Diameter
63.5mm = 2.5(2.1/2)inch
63.5mm = 2.5(2.1/2)inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
25.4mm = 1inch
25.4mm = 1inch
Material
Nitrile
Nitrile
Outside Diameter
31.75mm = 1.25(1.1/4)inch
31.75mm = 1.25(1.1/4)inch
Type
R21
R21
Width
3.05mm = 0.12inch
3.05mm = 0.12inch
Inside Diameter
25.4mm = 1inch
25.4mm = 1inch
Material
Nitrile
Nitrile
Outside Diameter
41.15mm = 1.62inch
41.15mm = 1.62inch
Type
R21
R21
Width
6.35mm = 0.25(1/4)inch
6.35mm = 0.25(1/4)inch
Inside Diameter
47.5mm = 1.87inch
47.5mm = 1.87inch
Material
Nitrile
Nitrile
Outside Diameter
69.85mm = 2.75(2.3/4)inch
69.85mm = 2.75(2.3/4)inch
Type
R23
R23
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
50.8mm = 2inch
50.8mm = 2inch
Material
Nitrile
Nitrile
Outside Diameter
69.85mm = 2.75(2.3/4)inch
69.85mm = 2.75(2.3/4)inch
Type
R23
R23
Width
9.4mm = 0.37inch
9.4mm = 0.37inch
Inside Diameter
31.75mm = 1.25(1.1/4)inch
31.75mm = 1.25(1.1/4)inch
Material
Nitrile
Nitrile
Outside Diameter
41.15mm = 1.62inch
41.15mm = 1.62inch
Type
R21
R21
Width
6.35mm = 0.25(1/4)inch
6.35mm = 0.25(1/4)inch
Inside Diameter
44.45mm = 1.75(1.3/4)inch
44.45mm = 1.75(1.3/4)inch
Material
Nitrile
Nitrile
Outside Diameter
69.85mm = 2.75(2.3/4)inch
69.85mm = 2.75(2.3/4)inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
57.15mm = 2.25(2.1/4)inch
57.15mm = 2.25(2.1/4)inch
Material
Nitrile
Nitrile
Outside Diameter
76.2mm = 3inch
76.2mm = 3inch
Type
R21
R21
Width
9.4mm = 0.37inch
9.4mm = 0.37inch
Inside Diameter
31.75mm = 1.25(1.1/4)inch
31.75mm = 1.25(1.1/4)inch
Material
Nitrile
Nitrile
Outside Diameter
57.15mm = 2.25(2.1/4)inch
57.15mm = 2.25(2.1/4)inch
Type
R21
R21
Width
7.87mm = 0.31inch
7.87mm = 0.31inch
Inside Diameter
52.32mm = 2.06inch
52.32mm = 2.06inch
Material
Nitrile
Nitrile
Outside Diameter
72.9mm = 2.87inch
72.9mm = 2.87inch
Type
R21
R21
Width
9.4mm = 0.37inch
9.4mm = 0.37inch
Inside Diameter
19.05mm = 0.75(3/4)inch
19.05mm = 0.75(3/4)inch
Material
Nitrile
Nitrile
Outside Diameter
38.1mm = 1.5(1.1/2)inch
38.1mm = 1.5(1.1/2)inch
Type
R21
R21
Width
9.4mm = 0.37inch
9.4mm = 0.37inch
Inside Diameter
49.02mm = 1.93inch
49.02mm = 1.93inch
Material
Nitrile
Nitrile
Outside Diameter
63.5mm = 2.5(2.1/2)inch
63.5mm = 2.5(2.1/2)inch
Type
R23
R23
Width
9.4mm = 0.37inch
9.4mm = 0.37inch
Inside Diameter
44.45mm = 1.75(1.3/4)inch
44.45mm = 1.75(1.3/4)inch
Material
Nitrile
Nitrile
Outside Diameter
53.85mm = 2.12inch
53.85mm = 2.12inch
Type
R21
R21
Width
4.57mm = 0.18inch
4.57mm = 0.18inch