JIS Neoprene O-Rings

OneMonroe offers high-quality neoprene O-rings that provide dependable sealing solutions for a broad range of applications. These O-rings are crafted from durable neoprene material, known for its excellent resistance to oils, greases, and many chemicals, as well as its superior durability in varying temperatures. With their outstanding physical properties, OneMonroe’s neoprene O-rings are ideally suited for use in automotive, aerospace, plumbing, and industrial applications, where effective sealing is essential for reliable performance and safety. No matter the application, OneMonroe neoprene O-rings are designed to withstand the demands of heavy use, ensuring long-lasting, leak-free performance in challenging environments.

Our neoprene O-rings are available in a range of sizes, including JIS (Japanese Industrial Standards) neoprene O-rings, to meet specific industry requirements. The JIS standard ensures consistent sizing and performance, making these O-rings an excellent choice for applications that demand precise, reliable sealing. OneMonroe understands the importance of having the right size and material to create a proper seal, which is why we offer a variety of options to suit the needs of different equipment and projects. Our O-rings are engineered for both static and dynamic applications, providing flexible, high-strength sealing solutions for everything from hydraulic systems to fuel handling.

When you choose OneMonroe neoprene O-rings, you’re investing in quality, performance, and peace of mind. We manufacture these O-rings to rigorous standards, ensuring they meet the high expectations of our customers. With exceptional resilience and chemical compatibility, OneMonroe neoprene O-rings offer a cost-effective sealing solution that enhances equipment efficiency and longevity. Rely on OneMonroe’s expertise and commitment to quality to deliver the reliable O-rings you need for critical applications in any industry.

For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.

Item #	IntegrationID	Type	Material	Cross Section Width	Durometer	Inside Diameter	CSW Tolerance	ID Tolerance	JIS Number
P250 C-70	N/A 179581	N/A JIS Standard O-Ring	N/A Neoprene	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
P255 C-70	N/A 179582	N/A JIS Standard O-Ring	N/A Neoprene	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
P26 C-70	N/A 179583	N/A JIS Standard O-Ring	N/A Neoprene	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
P260 C-70	N/A 179584	N/A JIS Standard O-Ring	N/A Neoprene	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
P265 C-70	N/A 179585	N/A JIS Standard O-Ring	N/A Neoprene	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
P270 C-70	N/A 179586	N/A JIS Standard O-Ring	N/A Neoprene	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
P275 C-70	N/A 179587	N/A JIS Standard O-Ring	N/A Neoprene	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
P28 C-70	N/A 179588	N/A JIS Standard O-Ring	N/A Neoprene	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
P280 C-70	N/A 179589	N/A JIS Standard O-Ring	N/A Neoprene	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
P285 C-70	N/A 179590	N/A JIS Standard O-Ring	N/A Neoprene	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
P29 C-70	N/A 179591	N/A JIS Standard O-Ring	N/A Neoprene	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
P29.5 C-70	N/A 179592	N/A JIS Standard O-Ring	N/A Neoprene	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
P290 C-70	N/A 179593	N/A JIS Standard O-Ring	N/A Neoprene	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
P295 C-70	N/A 179594	N/A JIS Standard O-Ring	N/A Neoprene	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
P30 C-70	N/A 179595	N/A JIS Standard O-Ring	N/A Neoprene	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
P300 C-70	N/A 179596	N/A JIS Standard O-Ring	N/A Neoprene	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
P31 C-70	N/A 179597	N/A JIS Standard O-Ring	N/A Neoprene	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
P31.5 C-70	N/A 179598	N/A JIS Standard O-Ring	N/A Neoprene	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
P315 C-70	N/A 179599	N/A JIS Standard O-Ring	N/A Neoprene	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
P32 C-70	N/A 179600	N/A JIS Standard O-Ring	N/A Neoprene	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
P320 C-70	N/A 179601	N/A JIS Standard O-Ring	N/A Neoprene	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
P335 C-70	N/A 179602	N/A JIS Standard O-Ring	N/A Neoprene	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
P34 C-70	N/A 179603	N/A JIS Standard O-Ring	N/A Neoprene	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
P340 C-70	N/A 179604	N/A JIS Standard O-Ring	N/A Neoprene	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
P35 C-70	N/A 179605	N/A JIS Standard O-Ring	N/A Neoprene	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
179581

N/A JIS Standard O-Ring

N/A Neoprene

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

P255 C-70

N/A
179582

N/A JIS Standard O-Ring

N/A Neoprene

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

P26 C-70

N/A
179583

N/A JIS Standard O-Ring

N/A Neoprene

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

P260 C-70

N/A
179584

N/A JIS Standard O-Ring

N/A Neoprene

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

P265 C-70

N/A
179585

N/A JIS Standard O-Ring

N/A Neoprene

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

P270 C-70

N/A
179586

N/A JIS Standard O-Ring

N/A Neoprene

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

P275 C-70

N/A
179587

N/A JIS Standard O-Ring

N/A Neoprene

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

P28 C-70

N/A
179588

N/A JIS Standard O-Ring

N/A Neoprene

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

P280 C-70

N/A
179589

N/A JIS Standard O-Ring

N/A Neoprene

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

P285 C-70

N/A
179590

N/A JIS Standard O-Ring

N/A Neoprene

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

P29 C-70

N/A
179591

N/A JIS Standard O-Ring

N/A Neoprene

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

P29.5 C-70

N/A
179592

N/A JIS Standard O-Ring

N/A Neoprene

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

P290 C-70

N/A
179593

N/A JIS Standard O-Ring

N/A Neoprene

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

P295 C-70

N/A
179594

N/A JIS Standard O-Ring

N/A Neoprene

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

P30 C-70

N/A
179595

N/A JIS Standard O-Ring

N/A Neoprene

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

P300 C-70

N/A
179596

N/A JIS Standard O-Ring

N/A Neoprene

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

P31 C-70

N/A
179597

N/A JIS Standard O-Ring

N/A Neoprene

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

P31.5 C-70

N/A
179598

N/A JIS Standard O-Ring

N/A Neoprene

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

P315 C-70

N/A
179599

N/A JIS Standard O-Ring

N/A Neoprene

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

P32 C-70

N/A
179600

N/A JIS Standard O-Ring

N/A Neoprene

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

P320 C-70

N/A
179601

N/A JIS Standard O-Ring

N/A Neoprene

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

P335 C-70

N/A
179602

N/A JIS Standard O-Ring

N/A Neoprene

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

P34 C-70

N/A
179603

N/A JIS Standard O-Ring

N/A Neoprene

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

P340 C-70

N/A
179604

N/A JIS Standard O-Ring

N/A Neoprene

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

P35 C-70

N/A
179605

N/A JIS Standard O-Ring

N/A Neoprene

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