JIS Buna O-Rings
Buna O-Rings
Japanese Industrial Standard O-Rings are another popular classification system used around the globe. Published by the Japanese Standard Association, these o-rings are also categorized using the metric system. JIS O-Rings are used in many different fields, but typically are implemented in Japan's semiconductor, automotive and machine tool industries. Buna is also known as: Nitrile, NBR, N, Buna-N.
Nitrile, chemically, is a copolymer of butadiene and acrylonitrile. Acrylonitrile content is varied in commercial products from 18% to 48%. As the nitrile content increases, resistance to petroleum base oils and hydrocarbon fuels increases, but low temperature flexibility decreases.
Due to its excellent resistance to petroleum products, and its ability to be compounded for service over a temperature range of -65 to +275°F(-54 to +135°C), nitrile is the most widely used elastomer in the seal industry today.
Inherently nitrile does not possess good resistance to ozone, sunlight or weather, but this can be substantially improved through compounding. For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.
Nitrile, chemically, is a copolymer of butadiene and acrylonitrile. Acrylonitrile content is varied in commercial products from 18% to 48%. As the nitrile content increases, resistance to petroleum base oils and hydrocarbon fuels increases, but low temperature flexibility decreases.
Due to its excellent resistance to petroleum products, and its ability to be compounded for service over a temperature range of -65 to +275°F(-54 to +135°C), nitrile is the most widely used elastomer in the seal industry today.
Inherently nitrile does not possess good resistance to ozone, sunlight or weather, but this can be substantially improved through compounding. For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.
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Cross Section Width (in)
Cross Section Width (mm)
Durometer
Inside Diameter (mm)
Inside Diameter (in)
Item # |
IntegrationID |
Type |
Material |
Cross Section Width |
Durometer |
Inside Diameter |
CSW Tolerance |
ID Tolerance |
JIS Number |
Call for a Quote |
O-Ring Industries |
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P360 B-90 |
IntegrationID
N/A 178438 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.331 in8.40 mm | Durometer N/A 90 | Inside Diameter N/A 359.50 mm14.154 in | CSW Tolerance N/A 0.006 in0.18 mm | ID Tolerance N/A 0.039 in1.00 mm | JIS Number N/A P-360 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
P360 B-70 |
IntegrationID
N/A 178437 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.331 in8.40 mm | Durometer N/A 70 | Inside Diameter N/A 359.50 mm14.154 in | CSW Tolerance N/A 0.006 in0.18 mm | ID Tolerance N/A 0.039 in1.00 mm | JIS Number N/A P-360 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
P355 B-90 |
IntegrationID
N/A 178434 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.331 in8.40 mm | Durometer N/A 90 | Inside Diameter N/A 354.50 mm13.957 in | CSW Tolerance N/A 0.006 in0.18 mm | ID Tolerance N/A 0.039 in1.00 mm | JIS Number N/A P-355 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
P355 B-70 |
IntegrationID
N/A 178433 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.331 in8.40 mm | Durometer N/A 70 | Inside Diameter N/A 354.50 mm13.957 in | CSW Tolerance N/A 0.006 in0.18 mm | ID Tolerance N/A 0.039 in1.00 mm | JIS Number N/A P-355 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
P36 B-90 |
IntegrationID
N/A 178436 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.138 in3.50 mm | Durometer N/A 90 | Inside Diameter N/A 35.70 mm1.406 in | CSW Tolerance N/A 0.004 in0.10 mm | ID Tolerance N/A 0.006 in0.15 mm | JIS Number N/A P-36 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries.v |
P36 B-70 |
IntegrationID
N/A 178435 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.138 in3.50 mm | Durometer N/A 70 | Inside Diameter N/A 35.70 mm1.406 in | CSW Tolerance N/A 0.004 in0.10 mm | ID Tolerance N/A 0.006 in0.15 mm | JIS Number N/A P-36 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
S36 B-90 |
IntegrationID
N/A 178590 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.079 in2.00 mm | Durometer N/A 90 | Inside Diameter N/A 35.50 mm1.398 in | CSW Tolerance N/A 0.004 in0.09 mm | ID Tolerance N/A 0.006 in0.15 mm | JIS Number N/A S-36 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
S36 B-70 |
IntegrationID
N/A 178589 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.079 in2.00 mm | Durometer N/A 70 | Inside Diameter N/A 35.50 mm1.398 in | CSW Tolerance N/A 0.004 in0.09 mm | ID Tolerance N/A 0.006 in0.15 mm | JIS Number N/A S-36 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
P35.5 B-90 |
IntegrationID
N/A 178432 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.138 in3.50 mm | Durometer N/A 90 | Inside Diameter N/A 35.20 mm1.386 in | CSW Tolerance N/A 0.004 in0.10 mm | ID Tolerance N/A 0.006 in0.15 mm | JIS Number N/A P-35.5 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
P35.5 B-70 |
IntegrationID
N/A 178431 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.138 in3.50 mm | Durometer N/A 70 | Inside Diameter N/A 35.20 mm1.386 in | CSW Tolerance N/A 0.004 in0.10 mm | ID Tolerance N/A 0.006 in0.15 mm | JIS Number N/A P-35.5 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
S35.5 B-90 |
IntegrationID
N/A 178588 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.079 in2.00 mm | Durometer N/A 90 | Inside Diameter N/A 35.00 mm1.378 in | CSW Tolerance N/A 0.004 in0.09 mm | ID Tolerance N/A 0.006 in0.15 mm | JIS Number N/A S-35.5 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
S35.5 B-70 |
IntegrationID
N/A 178587 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.079 in2.00 mm | Durometer N/A 70 | Inside Diameter N/A 35.00 mm1.378 in | CSW Tolerance N/A 0.004 in0.09 mm | ID Tolerance N/A 0.006 in0.15 mm | JIS Number N/A S-35.5 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
P35 B-90 |
IntegrationID
N/A 178430 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.138 in3.50 mm | Durometer N/A 90 | Inside Diameter N/A 34.70 mm1.366 in | CSW Tolerance N/A 0.004 in0.10 mm | ID Tolerance N/A 0.006 in0.15 mm | JIS Number N/A P-35 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
P35 B-70 |
IntegrationID
N/A 178429 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.138 in3.50 mm | Durometer N/A 70 | Inside Diameter N/A 34.70 mm1.366 in | CSW Tolerance N/A 0.004 in0.10 mm | ID Tolerance N/A 0.006 in0.15 mm | JIS Number N/A P-35 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
S35 B-90 |
IntegrationID
N/A 178586 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.079 in2.00 mm | Durometer N/A 90 | Inside Diameter N/A 34.50 mm1.358 in | CSW Tolerance N/A 0.004 in0.09 mm | ID Tolerance N/A 0.006 in0.15 mm | JIS Number N/A S-35 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries.v |
S35 B-70 |
IntegrationID
N/A 178585 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.079 in2.00 mm | Durometer N/A 70 | Inside Diameter N/A 34.50 mm1.358 in | CSW Tolerance N/A 0.004 in0.09 mm | ID Tolerance N/A 0.006 in0.15 mm | JIS Number N/A S-35 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
G35 B-90 |
IntegrationID
N/A 178250 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.122 in3.10 mm | Durometer N/A 90 | Inside Diameter N/A 34.40 mm1.354 in | CSW Tolerance N/A 0.004 in0.10 mm | ID Tolerance N/A 0.006 in0.15 mm | JIS Number N/A G-35 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
G35 B-70 |
IntegrationID
N/A 178249 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.122 in3.10 mm | Durometer N/A 70 | Inside Diameter N/A 34.40 mm1.354 in | CSW Tolerance N/A 0.004 in0.10 mm | ID Tolerance N/A 0.006 in0.15 mm | JIS Number N/A G-35 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
P340 B-90 |
IntegrationID
N/A 178428 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.331 in8.40 mm | Durometer N/A 90 | Inside Diameter N/A 339.50 mm13.366 in | CSW Tolerance N/A 0.006 in0.18 mm | ID Tolerance N/A 0.039 in1.00 mm | JIS Number N/A P-340 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
P340 B-70 |
IntegrationID
N/A 178427 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.331 in8.40 mm | Durometer N/A 70 | Inside Diameter N/A 339.50 mm13.366 in | CSW Tolerance N/A 0.006 in0.18 mm | ID Tolerance N/A 0.039 in1.00 mm | JIS Number N/A P-340 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
P335 B-90 |
IntegrationID
N/A 178424 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.331 in8.40 mm | Durometer N/A 90 | Inside Diameter N/A 334.50 mm13.169 in | CSW Tolerance N/A 0.006 in0.18 mm | ID Tolerance N/A 0.039 in1.00 mm | JIS Number N/A P-335 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
P335 B-70 |
IntegrationID
N/A 178423 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.331 in8.40 mm | Durometer N/A 70 | Inside Diameter N/A 334.50 mm13.169 in | CSW Tolerance N/A 0.006 in0.18 mm | ID Tolerance N/A 0.039 in1.00 mm | JIS Number N/A P-335 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
P34 B-90 |
IntegrationID
N/A 178426 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.138 in3.50 mm | Durometer N/A 90 | Inside Diameter N/A 33.70 mm1.327 in | CSW Tolerance N/A 0.004 in0.10 mm | ID Tolerance N/A 0.006 in0.15 mm | JIS Number N/A P-34 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
P34 B-70 |
IntegrationID
N/A 178425 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.138 in3.50 mm | Durometer N/A 70 | Inside Diameter N/A 33.70 mm1.327 in | CSW Tolerance N/A 0.004 in0.10 mm | ID Tolerance N/A 0.006 in0.15 mm | JIS Number N/A P-34 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |
V34 B-90 |
IntegrationID
N/A 178670 |
Type N/A JIS Standard O-Ring | Material N/A Buna | Cross Section Width N/A 0.157 in4.00 mm | Durometer N/A 90 | Inside Diameter N/A 33.50 mm1.319 in | CSW Tolerance N/A 0.004 in0.13 mm | ID Tolerance N/A 0.006 in0.15 mm | JIS Number N/A V-34 | Call for a Quote N/A | O-Ring Industries N/A O-rings are used in the military defense and agriculture industries. |