Filter by
Cross Section Shape
Hardness
System of Measurement
ID
Material
OD
Color
Maximum Temperature
Minimum Temperature
Hardness Rating
Military Specification
Fractional ID
Fractional OD
For Use With
Specifications Met
RoHS
REACH
U.S.–Mexico–Canada Agreement (USMCA) Qualifying
Export Control Classification Number (ECCN)
DFARS Specialty Metals
Certification
About O-Rings
More
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 stand up to a variety of oils and fuels as well as ammonia, ethylene glycol, and isopropyl alcohol. They’re also resilient and tear resistant. These O-rings are made in the U.S.
O-rings that meet MIL-P-25732 are the most common choice for use with hydraulic oil. They’ll withstand short periods of use at high temperatures.
Fractional | Actual | Pkg. | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dash Number  | ID | OD | ID | OD | Hardness | Specifications Met | Temp. Range, °F | Color | Pkg. Qty. | 1-9 | 10-Up | |
Wd.: 3/64 Fractional (0.05" Actual) | ||||||||||||
| 002 | 3/64 | 9/64 | 0.042" | 0.142" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T112 | 000000 | 000000 |
Wd.: 1/16 Fractional (0.07" Actual) | ||||||||||||
| 004 | 5/64 | 13/64 | 0.07" | 0.21" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T114 | 00000 | 00000 |
| 005 | 3/32 | 7/32 | 0.101" | 0.241" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T115 | 00000 | 00000 |
| 006 | 1/8 | 1/4 | 0.114" | 0.254" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T501 | 00000 | 00000 |
| 007 | 5/32 | 9/32 | 0.145" | 0.285" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T502 | 00000 | 00000 |
| 008 | 3/16 | 5/16 | 0.176" | 0.316" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T503 | 00000 | 00000 |
| 009 | 7/32 | 11/32 | 0.208" | 0.348" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T504 | 00000 | 00000 |
| 010 | 1/4 | 3/8 | 0.239" | 0.379" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T505 | 00000 | 00000 |
| 011 | 5/16 | 7/16 | 0.301" | 0.441" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T506 | 00000 | 00000 |
| 012 | 3/8 | 1/2 | 0.364" | 0.504" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T507 | 00000 | 00000 |
| 013 | 7/16 | 9/16 | 0.426" | 0.566" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T508 | 00000 | 00000 |
| 014 | 1/2 | 5/8 | 0.489" | 0.629" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T509 | 00000 | 00000 |
| 015 | 9/16 | 11/16 | 0.551" | 0.691" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T511 | 00000 | 00000 |
| 016 | 5/8 | 3/4 | 0.614" | 0.754" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T126 | 00000 | 00000 |
| 017 | 11/16 | 13/16 | 0.676" | 0.816" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T127 | 00000 | 00000 |
| 018 | 3/4 | 7/8 | 0.739" | 0.879" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T128 | 00000 | 00000 |
| 019 | 13/16 | 15/16 | 0.801" | 0.941" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T129 | 00000 | 00000 |
| 021 | 15/16 | 1 1/16 | 0.926" | 1.066" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T131 | 00000 | 00000 |
| 022 | 1 | 1 1/8 | 0.989" | 1.129" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T132 | 00000 | 00000 |
| 029 | 1 1/2 | 1 5/8 | 1.489" | 1.629" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 25 | 4198T139 | 00000 | 00000 |
| 037 | 2 1/2 | 2 5/8 | 2.489" | 2.629" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 10 | 4198T524 | 00000 | 00000 |
| 041 | 3 | 3 1/8 | 2.989" | 3.129" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 10 | 4198T151 | 00000 | 00000 |
| 042 | 3 1/4 | 3 3/8 | 3.239" | 3.379" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 10 | 4198T152 | 00000 | 00000 |
| 043 | 3 1/2 | 3 5/8 | 3.489" | 3.629" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 10 | 4198T153 | 00000 | 00000 |
| 044 | 3 3/4 | 3 7/8 | 3.739" | 3.879" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 10 | 4198T154 | 00000 | 00000 |
Wd.: 3/32 Fractional (0.103" Actual) | ||||||||||||
| 110 | 3/8 | 9/16 | 0.362" | 0.568" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T535 | 00000 | 00000 |
| 111 | 7/16 | 5/8 | 0.424" | 0.63" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T536 | 00000 | 00000 |
| 112 | 1/2 | 11/16 | 0.487" | 0.693" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T537 | 00000 | 00000 |
| 116 | 3/4 | 15/16 | 0.737" | 0.943" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T175 | 00000 | 00000 |
| 117 | 13/16 | 1 | 0.799" | 1.005" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T176 | 00000 | 00000 |
| 118 | 7/8 | 1 1/16 | 0.862" | 1.068" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 50 | 4198T177 | 00000 | 00000 |
| 152 | 3 1/4 | 3 7/16 | 3.237" | 3.443" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 10 | 4198T221 | 00000 | 00000 |
| 153 | 3 1/2 | 3 11/16 | 3.487" | 3.693" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 10 | 4198T222 | 00000 | 00000 |
Wd.: 1/8 Fractional (0.139" Actual) | ||||||||||||
| 210 | 3/4 | 1 | 0.734" | 1.012" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 25 | 4198T568 | 00000 | 00000 |
| 214 | 1 | 1 1/4 | 0.984" | 1.262" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 25 | 4198T573 | 00000 | 00000 |
| 216 | 1 1/8 | 1 3/8 | 1.109" | 1.387" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 25 | 4198T253 | 00000 | 00000 |
| 218 | 1 1/4 | 1 1/2 | 1.234" | 1.512" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 25 | 4198T255 | 00000 | 00000 |
| 219 | 1 5/16 | 1 9/16 | 1.296" | 1.574" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 25 | 4198T256 | 00000 | 00000 |
| 220 | 1 3/8 | 1 5/8 | 1.359" | 1.637" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 25 | 4198T257 | 00000 | 00000 |
| 222 | 1 1/2 | 1 3/4 | 1.484" | 1.762" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 10 | 4198T575 | 00000 | 0000 |
| 235 | 3 1/8 | 3 3/8 | 3.109" | 3.387" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 10 | 4198T272 | 00000 | 00000 |
| 237 | 3 3/8 | 3 5/8 | 3.359" | 3.637" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 10 | 4198T274 | 00000 | 00000 |
| 239 | 3 5/8 | 3 7/8 | 3.609" | 3.887" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 10 | 4198T276 | 00000 | 00000 |
| 241 | 3 7/8 | 4 1/8 | 3.859" | 4.137" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 10 | 4198T278 | 00000 | 00000 |
| 252 | 5 1/4 | 5 1/2 | 5.234" | 5.512" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 5 | 4198T289 | 00000 | 00000 |
Wd.: 3/16 Fractional (0.21" Actual) | ||||||||||||
| 328 | 1 7/8 | 2 1/4 | 1.85" | 2.27" | Durometer 70A (Medium) | ASTM D2000, MIL-P-25732, SAE AS568, SAE J200 | -30° to 250° | Black | 10 | 4198T351 | 00000 | 00000 |