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 | Reciprocating |
About O-Rings
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About Cylinder Seals
Rod wipers scrape dirt, dust, and moisture from the rod, preventing contamination inside your cylinder.
Rod seals maintain the pressure inside cylinders and prevent fluid from leaking out.
Wear rings guide the rod and piston to prevent uneven wear and optimize seal performance.
Head seals are a more reliable alternative to the standard O-ring/backup ring combination—they resist twisting and remain stable even in applications with fluctuating pressure.
Buffering seals protect hydraulic cylinders from pressure spikes and shock in high-pressure hydraulic applications.
Cushioning seals minimize wear and noise in air-powered cylinders by preventing the piston from slamming against the cylinder body.
Piston seals make a seal between their outside edge and the cylinder bore to prevent internal leaks.
Ultra-Chemical-Resistant Aflas O-Rings
While these Aflas O-rings are commonly used with petroleum fluids, they also resist many chemicals, such as ammonia, calcium hydroxide, and acetic, boric, and phosphoric acids. They have a round profile and are suitable for a wide range of static and dynamic sealing applications. All are sized to the SAE standard AS568.
For technical drawings and 3-D models, click on a part number.
Fractional | Actual | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dash Number | ID | OD | ID | OD | Hardness | Specifications Met | Temperature Range, °F | Color | Pkg. Qty. | Pkg. | |
Wd.: 1/16 Fractional (0.070" Actual) | |||||||||||
| 006 | 1/8 | 1/4 | 0.114" | 0.254" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 0000000 | 00000 |
| 007 | 5/32 | 9/32 | 0.145" | 0.285" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 0000000 | 0000 |
| 008 | 3/16 | 5/16 | 0.176" | 0.316" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 0000000 | 0000 |
| 009 | 7/32 | 11/32 | 0.208" | 0.348" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 0000000 | 0000 |
| 010 | 1/4 | 3/8 | 0.239" | 0.379" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 0000000 | 0000 |
| 011 | 5/16 | 7/16 | 0.301" | 0.441" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 0000000 | 0000 |
| 012 | 3/8 | 1/2 | 0.364" | 0.504" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 0000000 | 0000 |
| 013 | 7/16 | 9/16 | 0.426" | 0.566" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 0000000 | 0000 |
| 014 | 1/2 | 5/8 | 0.489" | 0.629" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 0000000 | 00000 |
| 015 | 9/16 | 11/16 | 0.551" | 0.691" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 0000000 | 00000 |
| 016 | 5/8 | 3/4 | 0.614" | 0.754" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 0000000 | 00000 |
| 017 | 11/16 | 13/16 | 0.676" | 0.816" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 0000000 | 0000 |
| 018 | 3/4 | 7/8 | 0.739" | 0.879" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 0000000 | 0000 |
| 019 | 13/16 | 15/16 | 0.801" | 0.941" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 0000000 | 0000 |
| 020 | 7/8 | 1 | 0.864" | 1.004" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 0000000 | 0000 |
| 021 | 15/16 | 1 1/16 | 0.926" | 1.066" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 0000000 | 0000 |
| 022 | 1 | 1 1/8 | 0.989" | 1.129" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 0000000 | 0000 |
| 023 | 1 1/16 | 1 3/16 | 1.051" | 1.191" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 0000000 | 0000 |
| 024 | 1 1/8 | 1 1/4 | 1.114" | 1.254" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 0000000 | 0000 |
| 025 | 1 3/16 | 1 5/16 | 1.176" | 1.316" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 0000 |
| 026 | 1 1/4 | 1 3/8 | 1.239" | 1.379" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 0000 |
| 027 | 1 5/16 | 1 7/16 | 1.301" | 1.441" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 0000 |
| 028 | 1 3/8 | 1 1/2 | 1.364" | 1.504" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 0000 |
| 029 | 1 1/2 | 1 5/8 | 1.489" | 1.629" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 0000 |
| 030 | 1 5/8 | 1 3/4 | 1.614" | 1.754" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 0000 |
| 031 | 1 3/4 | 1 7/8 | 1.739" | 1.879" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 0000000 | 0000 |
| 032 | 1 7/8 | 2 | 1.864" | 2.004" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 0000000 | 0000 |
| 033 | 2 | 2 1/8 | 1.989" | 2.129" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 0000000 | 0000 |
| 034 | 2 1/8 | 2 1/4 | 2.114" | 2.254" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 0000000 | 0000 |
| 035 | 2 1/4 | 2 3/8 | 2.239" | 2.379" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 0000 |
| 036 | 2 3/8 | 2 1/2 | 2.364" | 2.504" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 0000 |
| 037 | 2 1/2 | 2 5/8 | 2.489" | 2.629" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 00000 |
| 038 | 2 5/8 | 2 3/4 | 2.614" | 2.754" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 00000 |
| 039 | 2 3/4 | 2 7/8 | 2.739" | 2.879" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 00000 |
Wd.: 3/32 Fractional (0.103" Actual) | |||||||||||
| 110 | 3/8 | 9/16 | 0.362" | 0.568" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 0000000 | 0000 |
| 111 | 7/16 | 5/8 | 0.424" | 0.630" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 0000000 | 0000 |
| 112 | 1/2 | 11/16 | 0.487" | 0.693" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 0000000 | 0000 |
| 113 | 9/16 | 3/4 | 0.549" | 0.755" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 0000000 | 0000 |
| 114 | 5/8 | 13/16 | 0.612" | 0.818" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 0000000 | 00000 |
| 115 | 11/16 | 7/8 | 0.674" | 0.880" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 0000000 | 00000 |
| 116 | 3/4 | 15/16 | 0.737" | 0.943" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 0000000 | 00000 |
| 117 | 13/16 | 1 | 0.799" | 1.005" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 0000000 | 00000 |
| 118 | 7/8 | 1 1/16 | 0.862" | 1.068" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 0000000 | 00000 |
| 119 | 15/16 | 1 1/8 | 0.924" | 1.130" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 0000000 | 00000 |
| 120 | 1 | 1 3/16 | 0.987" | 1.193" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 0000000 | 00000 |
| 121 | 1 1/16 | 1 1/4 | 1.049" | 1.255" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 0000000 | 00000 |
| 122 | 1 1/8 | 1 5/16 | 1.112" | 1.318" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 0000000 | 00000 |
| 123 | 1 3/16 | 1 3/8 | 1.174" | 1.380" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 0000000 | 00000 |
| 124 | 1 1/4 | 1 7/16 | 1.237" | 1.443" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 0000000 | 00000 |
| 125 | 1 5/16 | 1 1/2 | 1.299" | 1.505" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 0000000 | 00000 |
| 126 | 1 3/8 | 1 9/16 | 1.362" | 1.568" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 0000000 | 00000 |
| 127 | 1 7/16 | 1 5/8 | 1.424" | 1.630" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 0000000 | 00000 |
| 128 | 1 1/2 | 1 11/16 | 1.487" | 1.693" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 0000 |
| 129 | 1 9/16 | 1 3/4 | 1.549" | 1.755" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 0000 |
| 130 | 1 5/8 | 1 13/16 | 1.612" | 1.818" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 0000 |
| 131 | 1 11/16 | 1 7/8 | 1.674" | 1.880" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 0000000 | 0000 |
| 132 | 1 3/4 | 1 15/16 | 1.737" | 1.943" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 0000000 | 0000 |
| 133 | 1 13/16 | 2 | 1.799" | 2.005" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 0000000 | 00000 |
| 134 | 1 7/8 | 2 1/16 | 1.862" | 2.068" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 0000000 | 00000 |
| 135 | 1 15/16 | 2 1/8 | 1.925" | 2.131" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 0000000 | 00000 |
| 136 | 2 | 2 3/16 | 1.987" | 2.193" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 0000000 | 00000 |
| 137 | 2 1/16 | 2 1/4 | 2.050" | 2.256" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 138 | 2 1/8 | 2 5/16 | 2.112" | 2.318" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 139 | 2 3/16 | 2 3/8 | 2.175" | 2.381" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 140 | 2 1/4 | 2 7/16 | 2.237" | 2.443" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 141 | 2 5/16 | 2 1/2 | 2.300" | 2.506" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 142 | 2 3/8 | 2 9/16 | 2.362" | 2.568" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 0000000 | 0000 |
| 143 | 2 7/16 | 2 5/8 | 2.425" | 2.631" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 0000000 | 0000 |
| 144 | 2 1/2 | 2 11/16 | 2.487" | 2.693" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 0000000 | 0000 |
| 145 | 2 9/16 | 2 3/4 | 2.550" | 2.756" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 0000000 | 0000 |
| 146 | 2 5/8 | 2 13/16 | 2.612" | 2.818" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 0000000 | 0000 |
| 147 | 2 11/16 | 2 7/8 | 2.675" | 2.881" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 0000000 | 0000 |
| 148 | 2 3/4 | 2 15/16 | 2.737" | 2.943" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 0000000 | 0000 |
| 149 | 2 13/16 | 3 | 2.800" | 3.006" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 0000000 | 0000 |
| 150 | 2 7/8 | 3 1/16 | 2.862" | 3.068" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 0000000 | 0000 |
| 151 | 3 | 3 3/16 | 2.987" | 3.193" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 0000000 | 0000 |
| 152 | 3 1/4 | 3 7/16 | 3.237" | 3.443" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 0000000 | 00000 |
| 153 | 3 1/2 | 3 11/16 | 3.487" | 3.693" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 0000000 | 0000 |
| 154 | 3 3/4 | 3 15/16 | 3.737" | 3.943" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 0000000 | 0000 |
| 155 | 4 | 4 3/16 | 3.987" | 4.193" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 0000000 | 0000 |
| 156 | 4 1/4 | 4 7/16 | 4.237" | 4.443" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
Wd.: 1/8 Fractional (0.139" Actual) | |||||||||||
| 208 | 5/8 | 7/8 | 0.609" | 0.887" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 00000000 | 00000 |
| 209 | 11/16 | 15/16 | 0.671" | 0.949" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 00000000 | 00000 |
| 210 | 3/4 | 1 | 0.734" | 1.012" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 00000000 | 00000 |
| 211 | 13/16 | 1 1/16 | 0.796" | 1.074" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 00000000 | 00000 |
| 212 | 7/8 | 1 1/8 | 0.859" | 1.137" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 00000000 | 00000 |
| 213 | 15/16 | 1 3/16 | 0.921" | 1.199" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 0000 |
| 214 | 1 | 1 1/4 | 0.984" | 1.262" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 0000 |
| 215 | 1 1/16 | 1 5/16 | 1.046" | 1.324" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 0000 |
| 216 | 1 1/8 | 1 3/8 | 1.109" | 1.387" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 0000 |
| 217 | 1 3/16 | 1 7/16 | 1.171" | 1.449" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 0000 |
| 218 | 1 1/4 | 1 1/2 | 1.234" | 1.512" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 00000 |
| 219 | 1 5/16 | 1 9/16 | 1.296" | 1.574" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 00000 |
| 220 | 1 3/8 | 1 5/8 | 1.359" | 1.637" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 00000 |
| 221 | 1 7/16 | 1 11/16 | 1.421" | 1.699" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 00000 |
| 222 | 1 1/2 | 1 3/4 | 1.484" | 1.762" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 00000 |
| 223 | 1 5/8 | 1 7/8 | 1.609" | 1.887" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 00000000 | 00000 |
| 224 | 1 3/4 | 2 | 1.734" | 2.012" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 225 | 1 7/8 | 2 1/8 | 1.859" | 2.137" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 226 | 2 | 2 1/4 | 1.984" | 2.262" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 227 | 2 1/8 | 2 3/8 | 2.109" | 2.387" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 228 | 2 1/4 | 2 1/2 | 2.234" | 2.512" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 0000 |
| 229 | 2 3/8 | 2 5/8 | 2.359" | 2.637" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 0000 |
| 230 | 2 1/2 | 2 3/4 | 2.484" | 2.762" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 0000 |
| 231 | 2 5/8 | 2 7/8 | 2.609" | 2.887" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 00000 |
| 232 | 2 3/4 | 3 | 2.734" | 3.012" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 00000 |
| 233 | 2 7/8 | 3 1/8 | 2.859" | 3.137" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 00000 |
| 234 | 3 | 3 1/4 | 2.984" | 3.262" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 00000 |
| 235 | 3 1/8 | 3 3/8 | 3.109" | 3.387" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 00000 |
| 236 | 3 1/4 | 3 1/2 | 3.234" | 3.512" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 00000 |
| 237 | 3 3/8 | 3 5/8 | 3.359" | 3.637" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 00000 |
| 238 | 3 1/2 | 3 3/4 | 3.484" | 3.762" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 00000 |
| 239 | 3 5/8 | 3 7/8 | 3.609" | 3.887" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 00000 |
| 240 | 3 3/4 | 4 | 3.734" | 4.012" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 00000 |
| 241 | 3 7/8 | 4 1/8 | 3.859" | 4.137" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 242 | 4 | 4 1/4 | 3.984" | 4.262" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 243 | 4 1/8 | 4 3/8 | 4.109" | 4.387" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 244 | 4 1/4 | 4 1/2 | 4.234" | 4.512" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 245 | 4 3/8 | 4 5/8 | 4.359" | 4.637" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 246 | 4 1/2 | 4 3/4 | 4.484" | 4.762" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 00000 |
| 247 | 4 5/8 | 4 7/8 | 4.609" | 4.887" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 00000 |
| 248 | 4 3/4 | 5 | 4.734" | 5.012" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 00000 |
| 249 | 4 7/8 | 5 1/8 | 4.859" | 5.137" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 00000 |
| 250 | 5 | 5 1/4 | 4.984" | 5.262" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 00000 |
| 251 | 5 1/8 | 5 3/8 | 5.109" | 5.387" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 00000 |
| 252 | 5 1/4 | 5 1/2 | 5.234" | 5.512" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 00000 |
| 253 | 5 3/8 | 5 5/8 | 5.359" | 5.637" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 00000 |
| 254 | 5 1/2 | 5 3/4 | 5.484" | 5.762" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 00000 |
| 256 | 5 3/4 | 6 | 5.734" | 6.012" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 00000 |
| 258 | 6 | 6 1/4 | 5.984" | 6.262" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 00000 |
| 259 | 6 1/4 | 6 1/2 | 6.234" | 6.512" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 00000 |
| 260 | 6 1/2 | 6 3/4 | 6.484" | 6.762" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 00000 |
| 261 | 6 3/4 | 7 | 6.734" | 7.012" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 00000 |
Wd.: 3/16 Fractional (0.210" Actual) | |||||||||||
| 325 | 1 1/2 | 1 7/8 | 1.475" | 1.895" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 0000 |
| 326 | 1 5/8 | 2 | 1.600" | 2.020" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 0000 |
| 327 | 1 3/4 | 2 1/8 | 1.725" | 2.145" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 00000 |
| 328 | 1 7/8 | 2 1/4 | 1.850" | 2.270" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 00000 |
| 329 | 2 | 2 3/8 | 1.975" | 2.395" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 00000 |
| 330 | 2 1/8 | 2 1/2 | 2.100" | 2.520" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 00000 |
| 331 | 2 1/4 | 2 5/8 | 2.225" | 2.645" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 00000 |
| 332 | 2 3/8 | 2 3/4 | 2.350" | 2.770" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 2 | 00000000 | 00000 |
| 333 | 2 1/2 | 2 7/8 | 2.475" | 2.895" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 334 | 2 5/8 | 3 | 2.600" | 3.020" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 335 | 2 3/4 | 3 1/8 | 2.725" | 3.145" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 336 | 2 7/8 | 3 1/4 | 2.850" | 3.270" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 337 | 3 | 3 3/8 | 2.975" | 3.395" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 338 | 3 1/8 | 3 1/2 | 3.100" | 3.520" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 339 | 3 1/4 | 3 5/8 | 3.225" | 3.645" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 340 | 3 3/8 | 3 3/4 | 3.350" | 3.770" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 341 | 3 1/2 | 3 7/8 | 3.475" | 3.895" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 342 | 3 5/8 | 4 | 3.600" | 4.020" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 343 | 3 3/4 | 4 1/8 | 3.725" | 4.145" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 344 | 3 7/8 | 4 1/4 | 3.850" | 4.270" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 0000 |
| 345 | 4 | 4 3/8 | 3.975" | 4.395" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 00000 |
| 346 | 4 1/8 | 4 1/2 | 4.100" | 4.520" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 00000 |
| 347 | 4 1/4 | 4 5/8 | 4.225" | 4.645" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 00000 |
| 348 | 4 3/8 | 4 3/4 | 4.350" | 4.770" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 00000 |
| 349 | 4 1/2 | 4 7/8 | 4.475" | 4.895" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 00000 |
| 350 | 4 5/8 | 5 | 4.600" | 5.020" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 00000000 | 00000 |
Buna-N U-Cup Seals
Side 1
Side 2
Profile
These U-cup seals create less friction than O-ring-loaded U-cups, so they wear more slowly. Also known as lip seals, U-cups have a sealing lip on both the inside and outside edges, so they can be used for rod and piston sealing. Pistons require two seals—install one facing in each direction.
Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.
For technical drawings and 3-D models, click on a part number.
Buna-N Rubber Seals
Piston Installation
Rod Installation
For Rod Sealing | For Piston Sealing | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Rod Dia. | For Groove Dia. | For Bore Dia. | For Groove Dia. | Max. Speed, ft./sec. | Max. Pressure, psi | Temp. Range, °F | Hardness | Color | Each | |
For 0.093" Groove Wd. | ||||||||||
| 1/4" | 0.375" | 3/8" | 0.250" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 00000 |
For 1/8" Groove Wd. | ||||||||||
| 1/4" | 0.437" | 7/16" | 0.250" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 5/8" | 0.812" | 13/16" | 0.625" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
For 0.156" Groove Wd. | ||||||||||
| 3/8" | 0.625" | 5/8" | 0.375" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 1/2" | 0.750" | 3/4" | 0.500" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 5/8" | 0.875" | 7/8" | 0.625" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 3/4" | 1.000" | 1" | 0.750" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 7/8" | 1.125" | 1 1/8" | 0.875" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 1" | 1.250" | 1 1/4" | 1.000" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 1 1/8" | 1.375" | 1 3/8" | 1.125" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 1 1/4" | 1.500" | 1 1/2" | 1.250" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 1 3/4" | 2.000" | 2" | 1.750" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
For 0.188" Groove Wd. | ||||||||||
| 7/8" | 1.250" | 1 1/4" | 0.875" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 1" | 1.312" | 1 5/16" | 1.000" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 1 1/8" | 1.437" | 1 7/16" | 1.125" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 1 1/4" | 1.562" | 1 9/16" | 1.250" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 1 3/8" | 1.687" | 1 11/16" | 1.375" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 1 1/2" | 1.812" | 1 13/16" | 1.500" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
For 0.218" Groove Wd. | ||||||||||
| 3/4" | 1.125" | 1 1/8" | 0.750" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 1 3/8" | 1.750" | 1 3/4" | 1.375" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 1 1/2" | 1.875" | 1 7/8" | 1.500" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 1 5/8" | 2.000" | 2" | 1.625" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 1 3/4" | 2.125" | 2 1/8" | 1.750" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 1 7/8" | 2.250" | 2 1/4" | 1.875" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 2" | 2.375" | 2 3/8" | 2.000" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 2 1/4" | 2.625" | 2 5/8" | 2.250" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 2 1/2" | 2.875" | 2 7/8" | 2.500" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 2 3/4" | 3.125" | 3 1/8" | 2.750" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 3" | 3.375" | 3 3/8" | 3.000" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
For 1/4" Groove Wd. | ||||||||||
| 2 1/2" | 2.937" | 2 15/16" | 2.500" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 2 3/4" | 3.187" | 3 3/16" | 2.750" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
| 3" | 3.437" | 3 7/16" | 3.000" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
For 0.281" Groove Wd. | ||||||||||
| 2 1/2" | 3.000" | 3" | 2.500" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 0000 |
For 0.406" Groove Wd. | ||||||||||
| 2 1/4" | 3.000" | 3" | 2.250" | 1.6 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 00000000 | 00000 |
Air-Powered Cylinder Cushioning Seals
Side 1
Side 2
Profile
Designed for use in air-powered cylinders, these seals prevent the piston from slamming against the cylinder body to minimize wear and noise.
Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.
For technical drawings and 3-D models, click on a part number.
For Groove | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Rod Dia. | Dia. | Wd. | Max. Speed, ft./sec. | Max. Pressure, psi | Temp. Range, °F | Hardness | Color | Each | |
Buna-N Rubber | |||||||||
| 5/8" | 0.935" | 0.181" | 3 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 0000000 | 00000 |
| 3/4" | 1.060" | 0.181" | 3 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 0000000 | 0000 |
| 7/8" | 1.195" | 0.181" | 3 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 0000000 | 0000 |
| 1 1/4" | 1.568" | 0.181" | 3 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 0000000 | 0000 |
| 1 5/8" | 1.939" | 0.181" | 3 | 250 | -40° to 250° | Durometer 80A (Hard) | Black | 0000000 | 0000 |