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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
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
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
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
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
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
142.75mm = 5.62inch
142.75mm = 5.62inch
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
142.75mm = 5.62inch
142.75mm = 5.62inch
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
152.4mm = 6inch
152.4mm = 6inch
Type
R21
R21
Width
19.05mm = 0.75(3/4)inch
19.05mm = 0.75(3/4)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
14.22mm = 0.56inch
14.22mm = 0.56inch
Inside Diameter
133.35mm = 5.25(5.1/4)inch
133.35mm = 5.25(5.1/4)inch
Material
Nitrile
Nitrile
Outside Diameter
165.1mm = 6.5(6.1/2)inch
165.1mm = 6.5(6.1/2)inch
Type
R21
R21
Width
15.75mm = 0.62inch
15.75mm = 0.62inch
Inside Diameter
139.7mm = 5.5(5.1/2)inch
139.7mm = 5.5(5.1/2)inch
Material
Nitrile
Nitrile
Outside Diameter
165.1mm = 6.5(6.1/2)inch
165.1mm = 6.5(6.1/2)inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
152.4mm = 6inch
152.4mm = 6inch
Material
Nitrile
Nitrile
Outside Diameter
190.5mm = 7.5inch
190.5mm = 7.5inch
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
107.95mm = 4.25(4.1/4)inch
107.95mm = 4.25(4.1/4)inch
Type
R23
R23
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
36.32mm = 1.43inch
36.32mm = 1.43inch
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
10.92mm = 0.43inch
10.92mm = 0.43inch
Material
Nitrile
Nitrile
Outside Diameter
19.05mm = 0.75(3/4)inch
19.05mm = 0.75(3/4)inch
Type
R21
R21
Width
6.35mm = 0.25(1/4)inch
6.35mm = 0.25(1/4)inch
Inside Diameter
9.4mm = 0.37inch
9.4mm = 0.37inch
Material
Nitrile
Nitrile
Outside Diameter
25.4mm = 1inch
25.4mm = 1inch
Type
R21
R21
Width
9.4mm = 0.37inch
9.4mm = 0.37inch
Inside Diameter
23.62mm = 0.93inch
23.62mm = 0.93inch
Material
Nitrile
Nitrile
Outside Diameter
34.8mm = 1.37inch
34.8mm = 1.37inch
Type
R21
R21
Width
6.35mm = 0.25(1/4)inch
6.35mm = 0.25(1/4)inch
Inside Diameter
33.27mm = 1.31inch
33.27mm = 1.31inch
Material
Nitrile
Nitrile
Outside Diameter
52.32mm = 2.06inch
52.32mm = 2.06inch
Type
R21
R21
Width
9.4mm = 0.37inch
9.4mm = 0.37inch
Inside Diameter
33.27mm = 1.31inch
33.27mm = 1.31inch
Material
Nitrile
Nitrile
Outside Diameter
52.32mm = 2.06inch
52.32mm = 2.06inch
Type
R21
R21
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
72.9mm = 2.87inch
72.9mm = 2.87inch
Type
R21
R21
Width
9.4mm = 0.37inch
9.4mm = 0.37inch
Inside Diameter
54.61mm = 2.15inch
54.61mm = 2.15inch
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
60.2mm = 2.37inch
60.2mm = 2.37inch
Material
Nitrile
Nitrile
Outside Diameter
91.95mm = 3.62inch
91.95mm = 3.62inch
Type
R21
R21
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
63.5mm = 2.5(2.1/2)inch
63.5mm = 2.5(2.1/2)inch
Material
Nitrile
Nitrile
Outside Diameter
95.25mm = 3.75(3.3/4)inch
95.25mm = 3.75(3.3/4)inch
Type
R23
R23
Width
12.7mm = 0.5(1/2)inch
12.7mm = 0.5(1/2)inch
Inside Diameter
74.42mm = 2.93inch
74.42mm = 2.93inch
Material
Nitrile
Nitrile
Outside Diameter
101.6mm = 4inch
101.6mm = 4inch
Type
R23
R23
Width
9.4mm = 0.37inch
9.4mm = 0.37inch
Inside Diameter
76.2mm = 3inch
76.2mm = 3inch
Material
Nitrile
Nitrile
Outside Diameter
104.65mm = 4.12inch
104.65mm = 4.12inch
Type
R21
R21
Width
10.92mm = 0.43inch
10.92mm = 0.43inch
Inside Diameter
76.2mm = 3inch
76.2mm = 3inch
Material
Nitrile
Nitrile
Outside Diameter
104.65mm = 4.12inch
104.65mm = 4.12inch
Type
R21
R21
Width
14.22mm = 0.56inch
14.22mm = 0.56inch
Inside Diameter
76.2mm = 3inch
76.2mm = 3inch
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
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
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