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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. EP is also known as: Eythylene Propylene, EPR, EPDM, EPT, E.

EP is an elastomer which is characterized by wide range of applications and good chemical resistance. Ethylene propylene compounds have good resistance to detergents, alkalis, mild acids, greases, silicone oils, and alcohols. 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
P250 EP-70 N/A
179321 		N/A JIS Standard O-Ring N/A EP N/A 0.331 in8.40 mm N/A 70 N/A 249.5 mm9.823 in N/A 0.006 in0.18 mm N/A 0.031 in0.80 mm N/A P-250 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P255 EP-70 N/A
179322 		N/A JIS Standard O-Ring N/A EP N/A 0.331 in8.40 mm N/A 70 N/A 254.5 mm10.020 in N/A 0.006 in0.18 mm N/A 0.031 in0.80 mm N/A P-255 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P26 EP-70 N/A
179323 		N/A JIS Standard O-Ring N/A EP N/A 0.138 in3.50 mm N/A 70 N/A 25.70 mm1.012 in N/A 0.004 in0.10 mm N/A 0.006 in0.15 mm N/A P-26 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P260 EP-70 N/A
179324 		N/A JIS Standard O-Ring N/A EP N/A 0.331 in8.40 mm N/A 70 N/A 259.5 mm10.217 in N/A 0.006 in0.18 mm N/A 0.031 in0.80 mm N/A P-260 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P265 EP-70 N/A
179325 		N/A JIS Standard O-Ring N/A EP N/A 0.331 in8.40 mm N/A 70 N/A 264.5 mm10.413 in N/A 0.006 in0.18 mm N/A 0.031 in0.80 mm N/A P-265 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P270 EP-70 N/A
179326 		N/A JIS Standard O-Ring N/A EP N/A 0.331 in8.40 mm N/A 70 N/A 269.5 mm10.610 in N/A 0.006 in0.18 mm N/A 0.031 in0.80 mm N/A P-270 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P275 EP-70 N/A
179327 		N/A JIS Standard O-Ring N/A EP N/A 0.331 in8.40 mm N/A 70 N/A 274.50 mm10.807 in N/A 0.006 in0.18 mm N/A 0.031 in0.80 mm N/A P-275 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P28 EP-70 N/A
179328 		N/A JIS Standard O-Ring N/A EP N/A 0.138 in3.50 mm N/A 70 N/A 27.70 mm1.091 in N/A 0.004 in0.10 mm N/A 0.006 in0.15 mm N/A P-28 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P280 EP-70 N/A
179329 		N/A JIS Standard O-Ring N/A EP N/A 0.331 in8.40 mm N/A 70 N/A 279.50 mm11.004 in N/A 0.006 in0.18 mm N/A 0.031 in0.80 mm N/A P-280 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P285 EP-70 N/A
179330 		N/A JIS Standard O-Ring N/A EP N/A 0.331 in8.40 mm N/A 70 N/A 284.50 mm11.201 in N/A 0.006 in0.18 mm N/A 0.031 in0.80 mm N/A P-285 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P29 EP-70 N/A
179331 		N/A JIS Standard O-Ring N/A EP N/A 0.138 in3.50 mm N/A 70 N/A 28.70 mm1.130 in N/A 0.004 in0.10 mm N/A 0.006 in0.15 mm N/A P-29 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P29.5 EP-70 N/A
179332 		N/A JIS Standard O-Ring N/A EP N/A 0.138 in3.50 mm N/A 70 N/A 29.20 mm1.150 in N/A 0.004 in0.10 mm N/A 0.006 in0.15 mm N/A P-29.5 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P290 EP-70 N/A
179333 		N/A JIS Standard O-Ring N/A EP N/A 0.331 in8.40 mm N/A 70 N/A 289.50 mm11.398 in N/A 0.006 in0.18 mm N/A 0.031 in0.80 mm N/A P-290 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P295 EP-70 N/A
179334 		N/A JIS Standard O-Ring N/A EP N/A 0.331 in8.40 mm N/A 70 N/A 294.50 mm11.594 in N/A 0.006 in0.18 mm N/A 0.031 in0.80 mm N/A P-295 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P30 EP-70 N/A
179335 		N/A JIS Standard O-Ring N/A EP N/A 0.138 in3.50 mm N/A 70 N/A 29.70 mm1.169 in N/A 0.004 in0.10 mm N/A 0.006 in0.15 mm N/A P-30 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P300 EP-70 N/A
179336 		N/A JIS Standard O-Ring N/A EP N/A 0.331 in8.40 mm N/A 70 N/A 299.50 mm11.791 in N/A 0.006 in0.18 mm N/A 0.031 in0.80 mm N/A P-300 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P31 EP-70 N/A
179337 		N/A JIS Standard O-Ring N/A EP N/A 0.138 in3.50 mm N/A 70 N/A 30.70 mm1.209 in N/A 0.004 in0.10 mm N/A 0.006 in0.15 mm N/A P-31 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P31.5 EP-70 N/A
179338 		N/A JIS Standard O-Ring N/A EP N/A 0.138 in3.50 mm N/A 70 N/A 31.20 mm1.228 in N/A 0.004 in0.10 mm N/A 0.006 in0.15 mm N/A P-31.5 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P315 EP-70 N/A
179339 		N/A JIS Standard O-Ring N/A EP N/A 0.331 in8.40 mm N/A 70 N/A 314.50 mm12.382 in N/A 0.006 in0.18 mm N/A 0.039 in1.00 mm N/A P-315 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P32 EP-70 N/A
179340 		N/A JIS Standard O-Ring N/A EP N/A 0.138 in3.50 mm N/A 70 N/A 31.70 mm1.248 in N/A 0.004 in0.10 mm N/A 0.006 in0.15 mm N/A P-32 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P320 EP-70 N/A
179341 		N/A JIS Standard O-Ring N/A EP N/A 0.331 in8.40 mm N/A 70 N/A 319.50 mm12.579 in N/A 0.006 in0.18 mm N/A 0.039 in1.00 mm N/A P-320 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P335 EP-70 N/A
179342 		N/A JIS Standard O-Ring N/A EP N/A 0.331 in8.40 mm N/A 70 N/A 334.50 mm13.169 in N/A 0.006 in0.18 mm N/A 0.039 in1.00 mm N/A P-335 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P34 EP-70 N/A
179343 		N/A JIS Standard O-Ring N/A EP N/A 0.138 in3.50 mm N/A 70 N/A 33.70 mm1.327 in N/A 0.004 in0.10 mm N/A 0.006 in0.15 mm N/A P-34 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P340 EP-70 N/A
179344 		N/A JIS Standard O-Ring N/A EP N/A 0.331 in8.40 mm N/A 70 N/A 339.50 mm13.366 in N/A 0.006 in0.18 mm N/A 0.039 in1.00 mm N/A P-340 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
P35 EP-70 N/A
179345 		N/A JIS Standard O-Ring N/A EP N/A 0.138 in3.50 mm N/A 70 N/A 34.70 mm1.366 in N/A 0.004 in0.10 mm N/A 0.006 in0.15 mm N/A P-35 N/A N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
Unit of Measure
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