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About O-Rings
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Oil-Resistant Mil. Spec. Buna-N O-Rings
Choose these O-rings for their adherence to strict military standards for material and construction. Made of Buna-N, they are resilient and offer resistance to tearing, motor oil, ammonia, ethylene glycol, isopropyl alcohol, and mineral oil. These O-rings 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 | Temp. Range, °F | Color | Pkg. Qty. | Pkg. | |
Wd.: 1/32 Fractional (0.04" Actual) | |||||||||||
| 001 | 1/32 | 3/32 | 0.029" | 0.109" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 000000 |
Wd.: 3/64 Fractional (0.05" Actual) | |||||||||||
| 002 | 3/64 | 9/64 | 0.042" | 0.142" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
Wd.: 1/16 Fractional (0.06" Actual) | |||||||||||
| 003 | 1/16 | 3/16 | 0.056" | 0.176" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
Wd.: 1/16 Fractional (0.07" Actual) | |||||||||||
| 004 | 5/64 | 13/64 | 0.07" | 0.21" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 005 | 3/32 | 7/32 | 0.101" | 0.241" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 006 | 1/8 | 1/4 | 0.114" | 0.254" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 008 | 3/16 | 5/16 | 0.176" | 0.316" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 009 | 7/32 | 11/32 | 0.208" | 0.348" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 010 | 1/4 | 3/8 | 0.239" | 0.379" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 011 | 5/16 | 7/16 | 0.301" | 0.441" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 012 | 3/8 | 1/2 | 0.364" | 0.504" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 013 | 7/16 | 9/16 | 0.426" | 0.566" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 016 | 5/8 | 3/4 | 0.614" | 0.754" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 017 | 11/16 | 13/16 | 0.676" | 0.816" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 018 | 3/4 | 7/8 | 0.739" | 0.879" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 019 | 13/16 | 15/16 | 0.801" | 0.941" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 020 | 7/8 | 1 | 0.864" | 1.004" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 0000000 | 00000 |
| 022 | 1 | 1 1/8 | 0.989" | 1.129" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 030 | 1 5/8 | 1 3/4 | 1.614" | 1.754" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 25 | 0000000 | 00000 |
| 039 | 2 3/4 | 2 7/8 | 2.739" | 2.879" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 10 | 00000000 | 00000 |
| 040 | 2 7/8 | 3 | 2.864" | 3.004" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 10 | 0000000 | 00000 |
| 041 | 3 | 3 1/8 | 2.989" | 3.129" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 10 | 00000000 | 00000 |
| 043 | 3 1/2 | 3 5/8 | 3.489" | 3.629" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 10 | 00000000 | 00000 |
| 044 | 3 3/4 | 3 7/8 | 3.739" | 3.879" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 10 | 00000000 | 00000 |
| 045 | 4 | 4 1/8 | 3.989" | 4.129" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 10 | 00000000 | 00000 |
| 050 | 5 1/4 | 5 3/8 | 5.239" | 5.379" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 5 | 0000000 | 00000 |
Wd.: 3/32 Fractional (0.103" Actual) | |||||||||||
| 103 | 3/32 | 9/32 | 0.081" | 0.287" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 104 | 1/8 | 5/16 | 0.112" | 0.318" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 106 | 3/16 | 3/8 | 0.174" | 0.38" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 107 | 7/32 | 13/32 | 0.206" | 0.412" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 108 | 1/4 | 7/16 | 0.237" | 0.443" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 109 | 5/16 | 1/2 | 0.299" | 0.505" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 113 | 9/16 | 3/4 | 0.549" | 0.755" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 114 | 5/8 | 13/16 | 0.612" | 0.818" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 116 | 3/4 | 15/16 | 0.737" | 0.943" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 117 | 13/16 | 1 | 0.799" | 1.005" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 118 | 7/8 | 1 1/16 | 0.862" | 1.068" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 120 | 1 | 1 3/16 | 0.987" | 1.193" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 125 | 1 5/16 | 1 1/2 | 1.299" | 1.505" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 25 | 00000000 | 00000 |
| 145 | 2 9/16 | 2 3/4 | 2.55" | 2.756" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 10 | 00000000 | 00000 |
| 149 | 2 13/16 | 3 | 2.8" | 3.006" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 10 | 00000000 | 00000 |
Wd.: 1/8 Fractional (0.139" Actual) | |||||||||||
| 203 | 5/16 | 9/16 | 0.296" | 0.574" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 206 | 1/2 | 3/4 | 0.484" | 0.762" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 208 | 5/8 | 7/8 | 0.609" | 0.887" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 209 | 11/16 | 15/16 | 0.671" | 0.949" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 50 | 00000000 | 00000 |
| 216 | 1 1/8 | 1 3/8 | 1.109" | 1.387" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 25 | 00000000 | 00000 |
| 218 | 1 1/4 | 1 1/2 | 1.234" | 1.512" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 25 | 00000000 | 00000 |
| 220 | 1 3/8 | 1 5/8 | 1.359" | 1.637" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 25 | 00000000 | 00000 |
| 221 | 1 7/16 | 1 11/16 | 1.421" | 1.699" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 25 | 00000000 | 00000 |
| 231 | 2 5/8 | 2 7/8 | 2.609" | 2.887" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 10 | 00000000 | 00000 |
| 235 | 3 1/8 | 3 3/8 | 3.109" | 3.387" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 10 | 00000000 | 00000 |
| 236 | 3 1/4 | 3 1/2 | 3.234" | 3.512" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 10 | 00000000 | 00000 |
| 238 | 3 1/2 | 3 3/4 | 3.484" | 3.762" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 10 | 00000000 | 00000 |
| 242 | 4 | 4 1/4 | 3.984" | 4.262" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 5 | 00000000 | 00000 |
| 245 | 4 3/8 | 4 5/8 | 4.359" | 4.637" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 5 | 00000000 | 00000 |
| 249 | 4 7/8 | 5 1/8 | 4.859" | 5.137" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 5 | 00000000 | 00000 |
| 251 | 5 1/8 | 5 3/8 | 5.109" | 5.387" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 5 | 00000000 | 00000 |
| 261 | 6 3/4 | 7 | 6.734" | 7.012" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 2 | 00000000 | 00000 |
| 263 | 7 1/4 | 7 1/2 | 7.234" | 7.512" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 2 | 0000000 | 00000 |
| 265 | 7 3/4 | 8 | 7.734" | 8.012" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 2 | 00000000 | 00000 |
| 266 | 8 | 8 1/4 | 7.984" | 8.262" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 2 | 00000000 | 00000 |
| 267 | 8 1/4 | 8 1/2 | 8.234" | 8.512" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 2 | 00000000 | 00000 |
| 268 | 8 1/2 | 8 3/4 | 8.484" | 8.762" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 2 | 00000000 | 00000 |
| 276 | 11 | 11 1/4 | 10.984" | 11.262" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 1 | 00000000 | 00000 |
| 277 | 11 1/2 | 11 3/4 | 11.484" | 11.762" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 1 | 00000000 | 00000 |
| 278 | 12 | 12 1/4 | 11.984" | 12.262" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 1 | 00000000 | 00000 |
Wd.: 3/16 Fractional (0.21" Actual) | |||||||||||
| 309 | 7/16 | 13/16 | 0.412" | 0.832" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 25 | 00000000 | 00000 |
| 314 | 3/4 | 1 1/8 | 0.725" | 1.145" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 25 | 00000000 | 00000 |
| 315 | 13/16 | 1 3/16 | 0.787" | 1.207" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 25 | 00000000 | 00000 |
| 316 | 7/8 | 1 1/4 | 0.85" | 1.27" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 25 | 00000000 | 00000 |
| 317 | 15/16 | 1 5/16 | 0.912" | 1.332" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 25 | 0000000 | 00000 |
| 318 | 1 | 1 3/8 | 0.975" | 1.395" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 25 | 00000000 | 00000 |
| 319 | 1 1/16 | 1 7/16 | 1.037" | 1.457" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 25 | 00000000 | 00000 |
| 320 | 1 1/8 | 1 1/2 | 1.1" | 1.52" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 25 | 00000000 | 00000 |
| 321 | 1 3/16 | 1 9/16 | 1.162" | 1.582" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 10 | 00000000 | 00000 |
| 322 | 1 1/4 | 1 5/8 | 1.225" | 1.645" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 10 | 00000000 | 00000 |
| 324 | 1 3/8 | 1 3/4 | 1.35" | 1.77" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 10 | 00000000 | 00000 |
| 325 | 1 1/2 | 1 7/8 | 1.475" | 1.895" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 10 | 00000000 | 00000 |
| 331 | 2 1/4 | 2 5/8 | 2.225" | 2.645" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 10 | 00000000 | 00000 |
| 333 | 2 1/2 | 2 7/8 | 2.475" | 2.895" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 10 | 00000000 | 00000 |
| 334 | 2 5/8 | 3 | 2.6" | 3.02" | Durometer 65A (Medium) | ASTM D2000, MIL-P-5315, SAE AS568, SAE J200 | -65° to 155° | Black | 10 | 00000000 | 00000 |