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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. Neoprene is also known as Chloroprene.

Neoprene resists fats, oils and petroleum products. Stands up well in sunlight. Low flammability - burns when exposed to flames, but self-extinguishes when flame is removed. Generally good ozone, aging and chemical resistance. It has good mechanical properties over a wide temperature range. 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

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O-Ring Industries

Quantity
P35.5 C-70 N/A
179606 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.138 in3.50 mm N/A 70 N/A 35.20 mm1.386 in N/A 0.004 in0.10 mm N/A 0.006 in0.15 mm N/A P-35.5 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P355 C-70 N/A
179607 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.331 in8.40 mm N/A 70 N/A 354.50 mm13.957 in N/A 0.006 in0.18 mm N/A 0.039 in1.00 mm N/A P-355 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P36 C-70 N/A
179608 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.138 in3.50 mm N/A 70 N/A 35.70 mm1.406 in N/A 0.004 in0.10 mm N/A 0.006 in0.15 mm N/A P-36 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P360 C-70 N/A
179609 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.331 in8.40 mm N/A 70 N/A 359.50 mm14.154 in N/A 0.006 in0.18 mm N/A 0.039 in1.00 mm N/A P-360 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P375 C-70 N/A
179610 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.331 in8.40 mm N/A 70 N/A 374.50 mm14.744 in N/A 0.006 in0.18 mm N/A 0.039 in1.00 mm N/A P-375 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P38 C-70 N/A
179611 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.138 in3.50 mm N/A 70 N/A 37.70 mm1.484 in N/A 0.004 in0.10 mm N/A 0.006 in0.15 mm N/A P-38 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P385 C-70 N/A
179612 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.331 in8.40 mm N/A 70 N/A 384.50 mm15.138 in N/A 0.006 in0.18 mm N/A 0.039 in1.00 mm N/A P-385 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P39 C-70 N/A
179613 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.138 in3.50 mm N/A 70 N/A 38.70 mm1.524 in N/A 0.004 in0.10 mm N/A 0.006 in0.15 mm N/A P-39 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P4 C-70 N/A
179614 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.075 in1.90 mm N/A 70 N/A 3.80 mm0.150 in N/A 0.003 in0.09 mm N/A 0.005 in0.12 mm N/A P-4 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P40 C-70 N/A
179615 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.138 in3.50 mm N/A 70 N/A 39.70 mm1.563 in N/A 0.004 in0.10 mm N/A 0.006 in0.15 mm N/A P-40 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P400 C-70 N/A
179616 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.331 in8.40 mm N/A 70 N/A 399.5 mm15.728 in N/A 0.006 in0.18 mm N/A 0.039 in1.00 mm N/A P-400 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P41 C-70 N/A
179617 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.138 in3.50 mm N/A 70 N/A 40.70 mm1.602 in N/A 0.004 in0.10 mm N/A 0.01 in0.25 mm N/A P-41 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P42 C-70 N/A
179618 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.138 in3.50 mm N/A 70 N/A 41.70 mm1.642 in N/A 0.004 in0.10 mm N/A 0.01 in0.25 mm N/A P-42 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P44 C-70 N/A
179619 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.138 in3.50 mm N/A 70 N/A 43.70 mm1.720 in N/A 0.004 in0.10 mm N/A 0.01 in0.25 mm N/A P-44 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P45 C-70 N/A
179620 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.138 in3.50 mm N/A 70 N/A 44.70 mm1.760 in N/A 0.004 in0.10 mm N/A 0.01 in0.25 mm N/A P-45 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P46 C-70 N/A
179621 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.138 in3.50 mm N/A 70 N/A 45.70 mm1.799 in N/A 0.004 in0.10 mm N/A 0.01 in0.25 mm N/A P-46 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P48 C-70 N/A
179622 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.138 in3.50 mm N/A 70 N/A 47.70 mm1.878 in N/A 0.004 in0.10 mm N/A 0.01 in0.25 mm N/A P-48 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P48A C-70 N/A
179623 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.224 in5.70 mm N/A 70 N/A 47.60 mm1.874 in N/A 0.006 in0.15 mm N/A 0.01 in0.25 mm N/A P-48A N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P49 C-70 N/A
179624 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.138 in3.50 mm N/A 70 N/A 48.70 mm1.917 in N/A 0.004 in0.10 mm N/A 0.01 in0.25 mm N/A P-49 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P5 C-70 N/A
179625 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.075 in1.90 mm N/A 70 N/A 4.80 mm0.189 in N/A 0.003 in0.09 mm N/A 0.005 in0.12 mm N/A P-5 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P50 C-70 N/A
179626 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.138 in3.50 mm N/A 70 N/A 49.70 mm1.957 in N/A 0.004 in0.10 mm N/A 0.01 in0.25 mm N/A P-50 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P50A C-70 N/A
179627 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.224 in5.70 mm N/A 70 N/A 49.60 mm1.953 in N/A 0.006 in0.15 mm N/A 0.01 in0.25 mm N/A P-50A N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P52 C-70 N/A
179628 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.224 in5.70 mm N/A 70 N/A 51.60 mm2.031 in N/A 0.006 in0.15 mm N/A 0.01 in0.25 mm N/A P-52 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P53 C-70 N/A
179629 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.224 in5.70 mm N/A 70 N/A 52.6 mm2.071 in N/A 0.006 in0.15 mm N/A 0.01 in0.25 mm N/A P-53 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P55 C-70 N/A
179630 		N/A JIS Standard O-Ring N/A Neoprene N/A 0.224 in5.70 mm N/A 70 N/A 54.60 mm2.150 in N/A 0.006 in0.15 mm N/A 0.01 in0.25 mm N/A P-55 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
Unit of Measure
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