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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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Ball Bearings (Loose Steel Balls)
O-ring Cord
Imperial Ball Bearings
SKF Ball Bearings
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
136.4mm = 5.37inch
136.4mm = 5.37inch
Type
R21
R21
Width
10.92mm = 0.43inch
10.92mm = 0.43inch
Inside Diameter
110.998mm = 4.37inch
110.998mm = 4.37inch
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
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
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
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
112.52mm = 4.43inch
112.52mm = 4.43inch
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
114.3mm = 4.5(4.1/2)inch
114.3mm = 4.5(4.1/2)inch
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
9.4mm = 0.37inch
9.4mm = 0.37inch
Inside Diameter
114.3mm = 4.5(4.1/2)inch
114.3mm = 4.5(4.1/2)inch
Material
Nitrile
Nitrile
Outside Diameter
139.7mm = 5.5(5.1/2)inch
139.7mm = 5.5(5.1/2)inch
Type
R23
R23
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
120.65mm = 4.75(4.3/4)inch
120.65mm = 4.75(4.3/4)inch
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
9.4mm = 0.37inch
9.4mm = 0.37inch
Inside Diameter
76.2mm = 3inch
76.2mm = 3inch
Material
Nitrile
Nitrile
Outside Diameter
101.6mm = 4inch
101.6mm = 4inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
38.1mm = 1.5(1.1/2)inch
38.1mm = 1.5(1.1/2)inch
Material
Nitrile
Nitrile
Outside Diameter
55.37mm = 2.18inch
55.37mm = 2.18inch
Type
R21
R21
Width
9.4mm = 0.37inch
9.4mm = 0.37inch
Inside Diameter
114.3mm = 4.5(4.1/2)inch
114.3mm = 4.5(4.1/2)inch
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
10.92mm = 0.43inch
10.92mm = 0.43inch
Inside Diameter
106.17mm = 4.18inch
106.17mm = 4.18inch
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
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
R23
R23
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
98.3mm = 3.87inch
98.3mm = 3.87inch
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
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
93.47mm = 3.68inch
93.47mm = 3.68inch
Material
Nitrile
Nitrile
Outside Diameter
130.05mm = 5.12inch
130.05mm = 5.12inch
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
127mm = 5inch
127mm = 5inch
Type
R21
R21
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
127mm = 5inch
127mm = 5inch
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
127mm = 5inch
127mm = 5inch
Type
R23
R23
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
127mm = 5inch
127mm = 5inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
99.82mm = 3.93inch
99.82mm = 3.93inch
Material
Nitrile
Nitrile
Outside Diameter
127mm = 5inch
127mm = 5inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
98.3mm = 3.87inch
98.3mm = 3.87inch
Material
Nitrile
Nitrile
Outside Diameter
127mm = 5inch
127mm = 5inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
95.25mm = 3.75(3.3/4)inch
95.25mm = 3.75(3.3/4)inch
Material
Nitrile
Nitrile
Outside Diameter
127mm = 5inch
127mm = 5inch
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
88.9mm = 3.5(3.1/2)inch
88.9mm = 3.5(3.1/2)inch
Material
Nitrile
Nitrile
Outside Diameter
127mm = 5inch
127mm = 5inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
98.3mm = 3.87inch
98.3mm = 3.87inch
Material
Nitrile
Nitrile
Outside Diameter
123.7mm = 4.87inch
123.7mm = 4.87inch
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
117.35mm = 4.62inch
117.35mm = 4.62inch
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
117.35mm = 4.62inch
117.35mm = 4.62inch
Type
R23
R23
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
117.35mm = 4.62inch
117.35mm = 4.62inch
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
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
87.12mm = 3.43inch
87.12mm = 3.43inch
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
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
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
R23
R23
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
101.6mm = 4inch
101.6mm = 4inch
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
95.25mm = 3.75(3.3/4)inch
95.25mm = 3.75(3.3/4)inch
Material
Nitrile
Nitrile
Outside Diameter
120.65mm = 4.75(4.3/4)inch
120.65mm = 4.75(4.3/4)inch
Type
R23
R23
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
95.25mm = 3.75(3.3/4)inch
95.25mm = 3.75(3.3/4)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
93.47mm = 3.68inch
93.47mm = 3.68inch
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
85.6mm = 3.37inch
85.6mm = 3.37inch
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
79.25mm = 3.12inch
79.25mm = 3.12inch
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
87.12mm = 3.43inch
87.12mm = 3.43inch
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
88.9mm = 3.5(3.1/2)inch
88.9mm = 3.5(3.1/2)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
88.9mm = 3.5(3.1/2)inch
88.9mm = 3.5(3.1/2)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
114.3mm = 4.5(4.1/2)inch
114.3mm = 4.5(4.1/2)inch
Type
R21
R21
Width
15.75mm = 0.62inch
15.75mm = 0.62inch
Inside Diameter
95.25mm = 3.75(3.3/4)inch
95.25mm = 3.75(3.3/4)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
85.6mm = 3.37inch
85.6mm = 3.37inch
Material
Nitrile
Nitrile
Outside Diameter
110.998mm = 4.37inch
110.998mm = 4.37inch
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
110.998mm = 4.37inch
110.998mm = 4.37inch
Type
R21
R21
Width
9.4mm = 0.37inch
9.4mm = 0.37inch