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About O-Rings
Find the right size, compare compatible materials, and choose the best cross section shape for your O-ring.
Steam- and Ultra-Chemical-Resistant Aflas O-Rings

Often used in drilling systems, these Aflas O-rings hold up to petroleum fluids. They also withstand steam and chemicals such as ammonia, calcium hydroxide, and boric acid. All have shelf life, a cure date, and a traceable lot number printed on the bag.
Fractional | Actual | Pkg. | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dash Number | ID | OD | ID | OD | Hardness | Specifications Met | Temperature Range, °F | Color | Pkg. Qty. | 1-9 | 10-Up | |
Wd.: 1/32 Fractional (0.04" Actual) | ||||||||||||
| 001 | 1/32 | 3/32 | 0.029" | 0.109" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 5240T248 | 00000 | 00000 |
Wd.: 3/64 Fractional (0.05" Actual) | ||||||||||||
| 002 | 3/64 | 9/64 | 0.042" | 0.142" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 5240T249 | 0000 | 0000 |
Wd.: 1/16 Fractional (0.06" Actual) | ||||||||||||
| 003 | 1/16 | 3/16 | 0.056" | 0.176" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 5240T251 | 00000 | 0000 |
Wd.: 1/16 Fractional (0.07" Actual) | ||||||||||||
| 004 | 5/64 | 13/64 | 0.07" | 0.21" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 5240T252 | 00000 | 0000 |
| 005 | 3/32 | 7/32 | 0.101" | 0.241" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 5240T253 | 00000 | 00000 |
| 006 | 1/8 | 1/4 | 0.114" | 0.254" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 5240T11 | 00000 | 00000 |
| 007 | 5/32 | 9/32 | 0.145" | 0.285" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 5240T12 | 00000 | 00000 |
| 008 | 3/16 | 5/16 | 0.176" | 0.316" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 5240T13 | 00000 | 00000 |
| 009 | 7/32 | 11/32 | 0.208" | 0.348" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 5240T14 | 00000 | 0000 |
| 010 | 1/4 | 3/8 | 0.239" | 0.379" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 5240T15 | 00000 | 00000 |
| 011 | 5/16 | 7/16 | 0.301" | 0.441" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 5240T16 | 00000 | 00000 |
| 012 | 3/8 | 1/2 | 0.364" | 0.504" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 5240T17 | 00000 | 00000 |
| 013 | 7/16 | 9/16 | 0.426" | 0.566" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 5240T18 | 00000 | 00000 |
| 014 | 1/2 | 5/8 | 0.489" | 0.629" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 5240T19 | 00000 | 00000 |
| 015 | 9/16 | 11/16 | 0.551" | 0.691" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 5240T21 | 00000 | 00000 |
| 016 | 5/8 | 3/4 | 0.614" | 0.754" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 25 | 5240T22 | 00000 | 00000 |
| 017 | 11/16 | 13/16 | 0.676" | 0.816" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 5240T23 | 0000 | 0000 |
| 018 | 3/4 | 7/8 | 0.739" | 0.879" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 5240T24 | 0000 | 0000 |
| 019 | 13/16 | 15/16 | 0.801" | 0.941" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 5240T25 | 0000 | 0000 |
| 020 | 7/8 | 1 | 0.864" | 1.004" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 5240T26 | 0000 | 0000 |
| 021 | 15/16 | 1 1/16 | 0.926" | 1.066" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 5240T27 | 0000 | 0000 |
| 022 | 1 | 1 1/8 | 0.989" | 1.129" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 5240T28 | 00000 | 0000 |
| 023 | 1 1/16 | 1 3/16 | 1.051" | 1.191" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 5240T29 | 00000 | 0000 |
| 024 | 1 1/8 | 1 1/4 | 1.114" | 1.254" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 5240T31 | 00000 | 00000 |
| 025 | 1 3/16 | 1 5/16 | 1.176" | 1.316" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T211 | 0000 | 0000 |
| 026 | 1 1/4 | 1 3/8 | 1.239" | 1.379" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T212 | 0000 | 0000 |
| 027 | 1 5/16 | 1 7/16 | 1.301" | 1.441" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T213 | 0000 | 0000 |
| 028 | 1 3/8 | 1 1/2 | 1.364" | 1.504" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T214 | 0000 | 0000 |
| 029 | 1 1/2 | 1 5/8 | 1.489" | 1.629" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T215 | 0000 | 0000 |
| 030 | 1 5/8 | 1 3/4 | 1.614" | 1.754" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T216 | 0000 | 0000 |
| 031 | 1 3/4 | 1 7/8 | 1.739" | 1.879" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T38 | 0000 | 0000 |
| 032 | 1 7/8 | 2 | 1.864" | 2.004" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T39 | 00000 | 0000 |
| 033 | 2 | 2 1/8 | 1.989" | 2.129" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T41 | 00000 | 0000 |
| 034 | 2 1/8 | 2 1/4 | 2.114" | 2.254" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T42 | 00000 | 0000 |
| 035 | 2 1/4 | 2 3/8 | 2.239" | 2.379" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T217 | 00000 | 00000 |
| 036 | 2 3/8 | 2 1/2 | 2.364" | 2.504" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T218 | 00000 | 00000 |
| 037 | 2 1/2 | 2 5/8 | 2.489" | 2.629" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T219 | 00000 | 00000 |
| 038 | 2 5/8 | 2 3/4 | 2.614" | 2.754" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T221 | 00000 | 00000 |
| 039 | 2 3/4 | 2 7/8 | 2.739" | 2.879" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T222 | 00000 | 00000 |
| 040 | 2 7/8 | 3 | 2.864" | 3.004" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 5240T254 | 0000 | 0000 |
| 041 | 3 | 3 1/8 | 2.989" | 3.129" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 5240T255 | 0000 | 0000 |
| 042 | 3 1/4 | 3 3/8 | 3.239" | 3.379" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 5240T256 | 0000 | 0000 |
| 043 | 3 1/2 | 3 5/8 | 3.489" | 3.629" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 5240T257 | 0000 | 0000 |
| 044 | 3 3/4 | 3 7/8 | 3.739" | 3.879" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 5240T258 | 0000 | 0000 |
| 045 | 4 | 4 1/8 | 3.989" | 4.129" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 5240T259 | 0000 | 0000 |
| 046 | 4 1/4 | 4 3/8 | 4.239" | 4.379" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 5240T261 | 0000 | 0000 |
| 047 | 4 1/2 | 4 5/8 | 4.489" | 4.629" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 5240T262 | 0000 | 0000 |
| 048 | 4 3/4 | 4 7/8 | 4.739" | 4.879" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 5240T263 | 0000 | 0000 |
| 049 | 5 | 5 1/8 | 4.989" | 5.129" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 5240T264 | 0000 | 0000 |
| 050 | 5 1/4 | 5 3/8 | 5.239" | 5.379" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 1 | 5240T265 | 0000 | 0000 |
Wd.: 3/32 Fractional (0.103" Actual) | ||||||||||||
| 105 | 5/32 | 11/32 | 0.143" | 0.349" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 5240T266 | 00000 | 00000 |
| 106 | 3/16 | 3/8 | 0.174" | 0.38" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 5240T267 | 00000 | 00000 |
| 107 | 7/32 | 13/32 | 0.206" | 0.412" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 5240T268 | 00000 | 00000 |
| 108 | 1/4 | 7/16 | 0.237" | 0.443" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 5240T269 | 00000 | 00000 |
| 109 | 5/16 | 1/2 | 0.299" | 0.505" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 5240T271 | 00000 | 00000 |
| 110 | 3/8 | 9/16 | 0.362" | 0.568" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 5240T48 | 00000 | 00000 |
| 111 | 7/16 | 5/8 | 0.424" | 0.63" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 5240T49 | 00000 | 00000 |
| 112 | 1/2 | 11/16 | 0.487" | 0.693" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 5240T51 | 00000 | 00000 |
| 113 | 9/16 | 3/4 | 0.549" | 0.755" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 5240T52 | 00000 | 00000 |
| 114 | 5/8 | 13/16 | 0.612" | 0.818" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 5240T53 | 00000 | 00000 |
| 115 | 11/16 | 7/8 | 0.674" | 0.88" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 5240T54 | 00000 | 00000 |
| 116 | 3/4 | 15/16 | 0.737" | 0.943" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 5240T55 | 00000 | 00000 |
| 117 | 13/16 | 1 | 0.799" | 1.005" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 15 | 5240T56 | 00000 | 00000 |
| 118 | 7/8 | 1 1/16 | 0.862" | 1.068" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 5240T57 | 00000 | 00000 |
| 119 | 15/16 | 1 1/8 | 0.924" | 1.13" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 5240T58 | 00000 | 00000 |
| 120 | 1 | 1 3/16 | 0.987" | 1.193" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 5240T59 | 00000 | 00000 |
| 121 | 1 1/16 | 1 1/4 | 1.049" | 1.255" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 5240T61 | 00000 | 00000 |
| 122 | 1 1/8 | 1 5/16 | 1.112" | 1.318" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 5240T62 | 00000 | 00000 |
| 123 | 1 3/16 | 1 3/8 | 1.174" | 1.38" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 5240T63 | 00000 | 00000 |
| 124 | 1 1/4 | 1 7/16 | 1.237" | 1.443" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 5240T64 | 00000 | 00000 |
| 125 | 1 5/16 | 1 1/2 | 1.299" | 1.505" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 5240T65 | 00000 | 00000 |
| 126 | 1 3/8 | 1 9/16 | 1.362" | 1.568" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 5240T66 | 00000 | 00000 |
| 127 | 1 7/16 | 1 5/8 | 1.424" | 1.63" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 10 | 5240T67 | 00000 | 00000 |
| 128 | 1 1/2 | 1 11/16 | 1.487" | 1.693" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T223 | 00000 | 00000 |
| 129 | 1 9/16 | 1 3/4 | 1.549" | 1.755" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T224 | 00000 | 00000 |
| 130 | 1 5/8 | 1 13/16 | 1.612" | 1.818" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T225 | 00000 | 0000 |
| 131 | 1 11/16 | 1 7/8 | 1.674" | 1.88" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T72 | 00000 | 00000 |
| 132 | 1 3/4 | 1 15/16 | 1.737" | 1.943" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T73 | 00000 | 00000 |
| 133 | 1 13/16 | 2 | 1.799" | 2.005" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T74 | 00000 | 00000 |
| 134 | 1 7/8 | 2 1/16 | 1.862" | 2.068" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T75 | 00000 | 00000 |
| 135 | 1 15/16 | 2 1/8 | 1.925" | 2.131" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T76 | 00000 | 00000 |
| 136 | 2 | 2 3/16 | 1.987" | 2.193" | Durometer 80A (Hard) | ASTM D2000, SAE AS568 | 25° to 450° | Black | 5 | 5240T77 | 00000 | 00000 |

























