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.
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Cross Section Width (in)

Cross Section Width (mm)

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Inside Diameter (mm)

Inside Diameter (in)

Item #

IntegrationID

Type

Material

Cross Section Width

Durometer

Inside Diameter

CSW Tolerance

ID Tolerance

JIS Number

G100 B-70 N/A
178181
N/A JIS Standard O-Ring N/A Buna N/A 0.122 in3.10 mm N/A 70 N/A 99.40 mm3.913 in N/A 0.004 in0.10 mm N/A 0.016 in0.40 mm N/A G-100
G100 B-90 N/A
178182
N/A JIS Standard O-Ring N/A Buna N/A 0.122 in3.10 mm N/A 90 N/A 99.40 mm3.913 in N/A 0.004 in0.10 mm N/A 0.016 in0.40 mm N/A G-100
G105 B-70 N/A
178183
N/A JIS Standard O-Ring N/A Buna N/A 0.122 in3.10 mm N/A 70 N/A 104.40 mm4.110 in N/A 0.004 in0.10 mm N/A 0.016 in0.40 mm N/A G-105
G105 B-90 N/A
178184
N/A JIS Standard O-Ring N/A Buna N/A 0.122 in3.10 mm N/A 90 N/A 104.40 mm4.110 in N/A 0.004 in0.10 mm N/A 0.016 in0.40 mm N/A G-105
G110 B-70 N/A
178185
N/A JIS Standard O-Ring N/A Buna N/A 0.122 in3.10 mm N/A 70 N/A 109.40 mm4.307 in N/A 0.004 in0.10 mm N/A 0.016 in0.40 mm N/A G-110
G110 B-90 N/A
178186
N/A JIS Standard O-Ring N/A Buna N/A 0.122 in3.10 mm N/A 90 N/A 109.40 mm4.307 in N/A 0.004 in0.10 mm N/A 0.016 in0.40 mm N/A G-110
G115 B-70 N/A
178187
N/A JIS Standard O-Ring N/A Buna N/A 0.122 in3.10 mm N/A 70 N/A 114.40 mm4.504 in N/A 0.004 in0.10 mm N/A 0.016 in0.40 mm N/A G-115
G115 B-90 N/A
178188
N/A JIS Standard O-Ring N/A Buna N/A 0.122 in3.10 mm N/A 90 N/A 114.40 mm4.504 in N/A 0.004 in0.10 mm N/A 0.016 in0.40 mm N/A G-115
G120 B-70 N/A
178189
N/A JIS Standard O-Ring N/A Buna N/A 0.122 in3.10 mm N/A 70 N/A 119.40 mm4.701 in N/A 0.004 in0.10 mm N/A 0.016 in0.40 mm N/A G-120
G120 B-90 N/A
178190
N/A JIS Standard O-Ring N/A Buna N/A 0.122 in3.10 mm N/A 90 N/A 119.40 mm4.701 in N/A 0.004 in0.10 mm N/A 0.016 in0.40 mm N/A G-120
G125 B-70 N/A
178191
N/A JIS Standard O-Ring N/A Buna N/A 0.122 in3.10 mm N/A 70 N/A 124.40 mm4.898 in N/A 0.004 in0.10 mm N/A 0.016 in0.40 mm N/A G-125
G125 B-90 N/A
178192
N/A JIS Standard O-Ring N/A Buna N/A 0.122 in3.10 mm N/A 90 N/A 124.40 mm4.898 in N/A 0.004 in0.10 mm N/A 0.016 in0.40 mm N/A G-125
G130 B-70 N/A
178193
N/A JIS Standard O-Ring N/A Buna N/A 0.122 in3.10 mm N/A 70 N/A 129.40 mm5.094 in N/A 0.004 in0.10 mm N/A 0.024 in0.60 mm N/A G-130
G130 B-90 N/A
178194
N/A JIS Standard O-Ring N/A Buna N/A 0.122 in3.10 mm N/A 90 N/A 129.40 mm5.094 in N/A 0.004 in0.10 mm N/A 0.024 in0.60 mm N/A G-130
G135 B-70 N/A
178195
N/A JIS Standard O-Ring N/A Buna N/A 0.122 in3.10 mm N/A 70 N/A 134.40 mm5.291 in N/A 0.004 in0.10 mm N/A 0.024 in0.60 mm N/A G-135
G135 B-90 N/A
178196
N/A JIS Standard O-Ring N/A Buna N/A 0.122 in3.10 mm N/A 90 N/A 134.40 mm5.291 in N/A 0.004 in0.10 mm N/A 0.024 in0.60 mm N/A G-135
G140 B-70 N/A
178197
N/A JIS Standard O-Ring N/A Buna N/A 0.122 in3.10 mm N/A 70 N/A 139.40 mm5.488 in N/A 0.004 in0.10 mm N/A 0.024 in0.60 mm N/A G-140
G140 B-90 N/A
178198
N/A JIS Standard O-Ring N/A Buna N/A 0.122 in3.10 mm N/A 90 N/A 139.40 mm5.488 in N/A 0.004 in0.10 mm N/A 0.024 in0.60 mm N/A G-140
G145 B-70 N/A
178199
N/A JIS Standard O-Ring N/A Buna N/A 0.122 in3.10 mm N/A 70 N/A 144.40 mm5.685 in N/A 0.004 in0.10 mm N/A 0.024 in0.60 mm N/A G-145
G145 B-90 N/A
178200
N/A JIS Standard O-Ring N/A Buna N/A 0.122 in3.10 mm N/A 90 N/A 144.40 mm5.685 in N/A 0.004 in0.10 mm N/A 0.024 in0.60 mm N/A G-145
G150 B-70 N/A
178201
N/A JIS Standard O-Ring N/A Buna N/A 0.224 in5.70 mm N/A 70 N/A 149.30 mm5.878 in N/A 0.006 in0.15 mm N/A 0.024 in0.60 mm N/A G-150
G150 B-90 N/A
178202
N/A JIS Standard O-Ring N/A Buna N/A 0.224 in5.70 mm N/A 90 N/A 149.30 mm5.878 in N/A 0.006 in0.15 mm N/A 0.024 in0.60 mm N/A G-150
G155 B-70 N/A
178203
N/A JIS Standard O-Ring N/A Buna N/A 0.224 in5.70 mm N/A 70 N/A 154.30 mm6.075 in N/A 0.006 in0.15 mm N/A 0.024 in0.60 mm N/A G-155
G155 B-90 N/A
178204
N/A JIS Standard O-Ring N/A Buna N/A 0.224 in5.70 mm N/A 90 N/A 154.30 mm6.075 in N/A 0.006 in0.15 mm N/A 0.024 in0.60 mm N/A G-155
G160 B-70 N/A
178205
N/A JIS Standard O-Ring N/A Buna N/A 0.224 in5.70 mm N/A 70 N/A 159.30 mm6.272 in N/A 0.006 in0.15 mm N/A 0.024 in0.60 mm N/A G-160
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