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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.
JIS O-Rings
Unit of Measure
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Item #

IntegrationID

Type

Material

Cross Section Width

Durometer

Inside Diameter

CSW Tolerance

ID Tolerance

JIS Number

Call for a Quote

O-Ring Industries

Quantity
V15 B-90 N/A
178656 		N/A JIS Standard O-Ring N/A Buna N/A 0.157 in4.00 mm N/A 90 N/A 14.5 mm0.571 in N/A 0.004 in0.13 mm N/A 0.006 in0.15 mm N/A V-15 N/A N/A O-rings are used in the military defense and agriculture industries.v
V150 B-70 N/A
178657 		N/A JIS Standard O-Ring N/A Buna N/A 0.157 in4.00 mm N/A 70 N/A 148.50 mm5.846 in N/A 0.004 in0.13 mm N/A 0.024 in0.60 mm N/A V-150 N/A N/A O-rings are used in the military defense and agriculture industries.
V150 B-90 N/A
178658 		N/A JIS Standard O-Ring N/A Buna N/A 0.157 in4.00 mm N/A 90 N/A 148.50 mm5.846 in N/A 0.004 in0.13 mm N/A 0.024 in0.60 mm N/A V-150 N/A N/A O-rings are used in the military defense and agriculture industries.
V175 B-70 N/A
178659 		N/A JIS Standard O-Ring N/A Buna N/A 0.157 in4.00 mm N/A 70 N/A 173.00 mm6.811 in N/A 0.004 in0.13 mm N/A 0.024 in0.60 mm N/A V-175 N/A N/A O-rings are used in the military defense and agriculture industries.
V175 B-90 N/A
178660 		N/A JIS Standard O-Ring N/A Buna N/A 0.157 in4.00 mm N/A 90 N/A 173.00 mm6.811 in N/A 0.004 in0.13 mm N/A 0.024 in0.60 mm N/A V-175 N/A N/A O-rings are used in the military defense and agriculture industries.
V225 B-70 N/A
178661 		N/A JIS Standard O-Ring N/A Buna N/A 0.236 in6.00 mm N/A 70 N/A 222.5 mm8.760 in N/A 0.006 in0.15 mm N/A 0.031 in0.80 mm N/A V-225 N/A N/A O-rings are used in the military defense and agriculture industries.
V225 B-90 N/A
178662 		N/A JIS Standard O-Ring N/A Buna N/A 0.236 in6.00 mm N/A 90 N/A 222.5 mm8.760 in N/A 0.006 in0.15 mm N/A 0.031 in0.80 mm N/A V-225 N/A N/A O-rings are used in the military defense and agriculture industries.
V24 B-70 N/A
178663 		N/A JIS Standard O-Ring N/A Buna N/A 0.157 in4.00 mm N/A 70 N/A 23.5 mm0.925 in N/A 0.004 in0.13 mm N/A 0.006 in0.15 mm N/A V-24 N/A N/A O-rings are used in the military defense and agriculture industries.
V24 B-90 N/A
178664 		N/A JIS Standard O-Ring N/A Buna N/A 0.157 in4.00 mm N/A 90 N/A 23.5 mm0.925 in N/A 0.004 in0.13 mm N/A 0.006 in0.15 mm N/A V-24 N/A N/A O-rings are used in the military defense and agriculture industries.
V275 B-70 N/A
178665 		N/A JIS Standard O-Ring N/A Buna N/A 0.236 in6.00 mm N/A 70 N/A 272 mm10.709 in N/A 0.006 in0.15 mm N/A 0.031 in0.80 mm N/A V-275 N/A N/A O-rings are used in the military defense and agriculture industries.
V275 B-90 N/A
178666 		N/A JIS Standard O-Ring N/A Buna N/A 0.236 in6.00 mm N/A 90 N/A 272 mm10.709 in N/A 0.006 in0.15 mm N/A 0.031 in0.80 mm N/A V-275 N/A N/A O-rings are used in the military defense and agriculture industries.
V325 B-70 N/A
178667 		N/A JIS Standard O-Ring N/A Buna N/A 0.236 in6.00 mm N/A 70 N/A 321.50 mm12.657 in N/A 0.006 in0.15 mm N/A 0.039 in1.00 mm N/A V-325 N/A N/A O-rings are used in the military defense and agriculture industries.
V325 B-90 N/A
178668 		N/A JIS Standard O-Ring N/A Buna N/A 0.236 in6.00 mm N/A 90 N/A 321.50 mm12.657 in N/A 0.006 in0.15 mm N/A 0.039 in1.00 mm N/A V-325 N/A N/A O-rings are used in the military defense and agriculture industries.v
V34 B-70 N/A
178669 		N/A JIS Standard O-Ring N/A Buna N/A 0.157 in4.00 mm N/A 70 N/A 33.50 mm1.319 in N/A 0.004 in0.13 mm N/A 0.006 in0.15 mm N/A V-34 N/A N/A O-rings are used in the military defense and agriculture industries.
V34 B-90 N/A
178670 		N/A JIS Standard O-Ring N/A Buna N/A 0.157 in4.00 mm N/A 90 N/A 33.50 mm1.319 in N/A 0.004 in0.13 mm N/A 0.006 in0.15 mm N/A V-34 N/A N/A O-rings are used in the military defense and agriculture industries.
V380 B-70 N/A
178671 		N/A JIS Standard O-Ring N/A Buna N/A 0.236 in6.00 mm N/A 70 N/A 376.00 mm14.803 in N/A 0.006 in0.15 mm N/A 0.039 in1.00 mm N/A V-380 N/A N/A O-rings are used in the military defense and agriculture industries.
V380 B-90 N/A
178672 		N/A JIS Standard O-Ring N/A Buna N/A 0.236 in6.00 mm N/A 90 N/A 376.00 mm14.803 in N/A 0.006 in0.15 mm N/A 0.039 in1.00 mm N/A V-380 N/A N/A O-rings are used in the military defense and agriculture industries.
V40 B-70 N/A
178673 		N/A JIS Standard O-Ring N/A Buna N/A 0.157 in4.00 mm N/A 70 N/A 39.50 mm1.555 in N/A 0.004 in0.13 mm N/A 0.006 in0.15 mm N/A V-40 N/A N/A O-rings are used in the military defense and agriculture industries.
V40 B-90 N/A
178674 		N/A JIS Standard O-Ring N/A Buna N/A 0.157 in4.00 mm N/A 90 N/A 39.50 mm1.555 in N/A 0.004 in0.13 mm N/A 0.006 in0.15 mm N/A V-40 N/A N/A O-rings are used in the military defense and agriculture industries.
V430 B-70 N/A
178675 		N/A JIS Standard O-Ring N/A Buna N/A 0.236 in6.00 mm N/A 70 N/A 425.5 mm16.752 in N/A 0.006 in0.15 mm N/A 0.047 in1.20 mm N/A V-430 N/A N/A O-rings are used in the military defense and agriculture industries.
V430 B-90 N/A
178676 		N/A JIS Standard O-Ring N/A Buna N/A 0.236 in6.00 mm N/A 90 N/A 425.5 mm16.752 in N/A 0.006 in0.15 mm N/A 0.047 in1.20 mm N/A V-430 N/A N/A O-rings are used in the military defense and agriculture industries.
V480 B-70 N/A
178677 		N/A JIS Standard O-Ring N/A Buna N/A 0.394 in10.00 mm N/A 70 N/A 475.00 mm18.701 in N/A 0.012 in0.22 mm N/A 0.047 in1.20 mm N/A V-480 N/A N/A O-rings are used in the military defense and agriculture industries.
V480 B-90 N/A
178678 		N/A JIS Standard O-Ring N/A Buna N/A 0.394 in10.00 mm N/A 90 N/A 475.00 mm18.701 in N/A 0.012 in0.22 mm N/A 0.047 in1.20 mm N/A V-480 N/A N/A O-rings are used in the military defense and agriculture industries.
V530 B-70 N/A
178679 		N/A JIS Standard O-Ring N/A Buna N/A 0.394 in10.00 mm N/A 70 N/A 524.5 mm20.650 in N/A 0.012 in0.22 mm N/A 0.063 in1.60 mm N/A V-530 N/A N/A O-rings are used in the military defense and agriculture industries.
V530 B-90 N/A
178680 		N/A JIS Standard O-Ring N/A Buna N/A 0.394 in10.00 mm N/A 90 N/A 524.5 mm20.650 in N/A 0.012 in0.22 mm N/A 0.063 in1.60 mm N/A V-530 N/A N/A O-rings are used in the military defense and agriculture industries.
Unit of Measure
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