Buna-N Rubber | McMaster-Carr

001
001-1/2
002
003
004
005
006
007
008
009
010
011
012
013
014
015
016
017
018
019
020
021
022
023
024
025
026
027
028
029
030
031
032
033
034
035
036
037
038
039
040
041
042
043
044
045
046
047
048
049
050
051
052
053
054
055
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
901
902
903
904
905
906
907
908
909
910
911
912
913
914
916
918
920
924
928
932

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Fractional Width Fractional Width

	For Use Outdoors For Use Outdoors

Yes

View catalog pages (39)

Forward

How can we improve?

5,318 Products

About O-Rings

Oil-Resistant Buna-N Rubber Sheets, Bars, and Strips

Buna-N rubber resists fuel oil, hydraulic oil, ethylene glycol, and grease.

High-Strength Oil-Resistant
Buna-N Rubber Sheets and Strips

These sheets and strips offer better shock-absorbing qualities and longer life than standard Oil-Resistant Buna-N.

Food Industry Oil-Resistant
Buna-N Rubber Sheets and Strips

Made from FDA-compliant materials for use with food and beverage, these sheets and strips won’t degrade from animal and vegetable oils.

Oil-Resistant High-Temperature Buna-N Rubber Sheets

Because these sheets and strips are made from peroxide-cured Buna-N rubber, they have better heat resistance than standard Oil-Resistant Buna-N rubber sheets and strips.

Ultra-Strength Oil-Resistant
Buna-N Rubber Sheets and Strips

With the greatest tensile strength of all our oil-resistant rubber, these super-strong Buna-N sheets and strips can handle high-tension applications, such as belting.

Food Industry Ultra-Strength Oil-Resistant
Buna-N/Vinyl Rubber Sheets

The addition of vinyl make these sheets the strongest Food Industry Oil-Resistant rubber we offer. Use them for high-tension applications, such as belting. They’re made from FDA-listed materials for use with food and offer good resistance to animal and vegetable oils.

Food Industry High-Strength Oil-Resistant
Buna-N Rubber Sheets and Strips

Greater tensile strength than standard Food-Grade Oil-Resistant Buna-N rubber gives these sheets and strips better shock-absorbing qualities and longer life. They’re made from FDA-listed materials for use with food and beverage and offer good resistance to animal and vegetable oils.

Fabric-Reinforced Oil-Resistant Buna-N Rubber Sheets

To maintain their size and shape under heavy compression, these sheets have one layer of nylon fabric for every 1/16” of thickness. Use them as flange gaskets and diaphragm packing.

Oil-Resistant Buna-N Rubber Rods

Seal and cushion narrow spaces, such as inside channels and seams.

Oil-Resistant Buna-N Rubber Tubes

Applications for these tubes include jackets, seals, and insulation.

Oil-Resistant Buna-N Rubber Balls

Use these balls as seals in pumps and check valves or let them bounce inside of vibrating sifters for an effective screen cleaner.

Oil-Resistant Buna-N Foam Sheets and Strips

Made of Buna-N foam, these sheets offer better oil resistance than blended Buna-N foam. They also resist fuel and solvents.

Oil-Resistant Blended Buna-N Foam Strips

Made from a blend of Buna-N, neoprene, and vinyl, these foam strips have good resistance to oil.

Flame-Retardant Oil-Resistant Blended
Buna-N Foam Sheets and Strips

This foam meets UL fire extinguishing specifications. It's made from a blend of Buna-N, neoprene, and vinyl to offer offer good resistance to oil.

Oil-Resistant Buna-N O-Rings

Made of Buna-N, these O-rings resist grease, hydraulic oil, and motor oil—plus mild chemicals and water.

Oil-Resistant Soft Buna-N O-Rings

Softer than standard Buna-N O-rings for a better seal in low-pressure applications.

Oil-Resistant Hard Buna-N O-Rings

These hard O-rings offer better wear resistance than standard Buna-N O-rings.

Oil-Resistant Hard Buna-N O-Rings for Tube
Fittings with Straight-Thread Connection

Also known as Boss O-rings, these hard O-rings are for use in tube fittings with a straight-thread connection.

Made-to-Order Oil-Resistant Buna-N O-Rings

When you need an O-ring that’s not an industry standard size, we can make one to fit your requirements. These resist grease, hydraulic oils, and motor oil.

Square-Profile Oil-Resistant Buna-N O-Rings

With flat edges on all four sides, square-profile O-rings cover more surface than round-profile O-rings for a better seal in static applications, such as hose, pipe, and faucet connections.

X-Profile Oil-Resistant Buna-N O-Rings

Also known as Quattro Seals and X-rings, these X-profile O-rings have four points of contact for a better seal in dynamic applications than round-profile O-rings. They also require less compression to make a seal, so they offer a longer service life.

Double X-Profile Oil-Resistant Buna-N O-Rings

These O-rings have eight points of contact for a better seal in dynamic applications than X-profile O-rings, plus they have eight grooves that hold lubricant to reduce friction and wear for a longer service life.

Oil-Resistant Mil. Spec. Buna-N O-Rings

Choose these O-rings for their adherence to strict military standards for material and construction.

Oil-Resistant Metal-Detectable Buna-N O-Rings

If these O-rings deteriorate, they can be picked up by metal detection systems.

Oil-Resistant Food Industry Buna-N O-Rings

These Buna-N O-rings are made of FDA-listed material for use with food and beverage.

Oil-Resistant O-Ring Cord Stock

Oil-Resistant Buna-N O-Ring Cord Stock

Oil-Resistant Soft Buna-N O-Ring Cord Stock

This cord stock is softer and creates a better seal in low-pressure applications than standard Buna-N cord stock.

Oil-Resistant Hard Buna-N O-Ring Cord Stock

Harder than standard Buna-N cord stock for better wear resistance.

Square-Profile Oil-Resistant Buna-N O-Ring Cord Stock

This square-profile cord stock has flat edges on all four sides, which creates a better seal than round profile in static applications, such as hose, pipe, and faucet connections.

X-Profile Oil-Resistant Buna-N O-Ring Cord Stock

The X shape of this cord stock provides four points of contact for a better seal in dynamic applications than round profile. It also requires less compression to make a seal, so it offers a longer service life.

Oil-Resistant Food Industry Buna-N O-Ring Cord Stock

Made of FDA-listed material for use with food and beverage, this cord stock resists animal and vegetable oils, citric acid, sodium bicarbonate, and grease.

O-Ring Assortments

Oil-Resistant Buna-N O-Ring Assortments

All of the O-rings in these assortments are made of Buna-N. They resist animal, vegetable, and motor oils.

Oil-Resistant Soft Buna-N O-Ring Assortments

Softer than standard Buna-N O-rings for a better seal in low-pressure applications.

Oil-Resistant Hard Buna-N O-Ring Assortments
for Tube Fittings with Straight-Thread Connection

Also known as Boss O-rings, these hard O-rings are for use in tube fittings with a straight-thread connection.

Oil-Resistant Hard Buna-N O-Ring Assortments

These O-rings are harder than standard Buna-N O-rings for better resistance to wear.

X-Profile Oil-Resistant Buna-N O-Ring Assortments

Square-Profile Oil-Resistant
Buna-N O-Ring Assortments

These O-rings have a square profile with flat edges on all four sides. They cover more surface than round-profile O-rings for a better seal in static applications, such as hose, pipe, and faucet connections.

Oil- and Chemical-Resistant O-Ring Assortments

These assortments contain a mix of Buna-N O-rings that resist oil and Viton® fluoroelastomer O-rings that resist boric acid, fuels, and transmission fluid.

O-Ring Bonding Kits

These kits include everything you need to make your own Buna-N, Viton® fluoroelastomer, or EPDM O-rings.

Gasket Material

Oil-Resistant Compressible Buna-N Gasket Material

Also resistant to water and salts.

Oil-Resistant Food Industry
Compressible Buna-N Gasket Material

Made of FDA-listed material for use with food and beverage.

Oil-Resistant High-Strength
Aramid/Buna-N Gasket Material

Commonly used in low-pressure applications, cork is blended with Buna-N rubber for a flexible, oil-resistant gasket material.

Oil-Resistant Aramid/Buna-N Gasket Material

Made from a blend of aramid fiber and Buna-N rubber.

Oil-Resistant Light Duty Cork/Buna-N Gasket Material

Commonly used in low-pressure applications, cork is blended with Buna-N rubber for a flexible, oil-resistant gasket material.

High-Temperature Oil-Resistant
Carbon/Buna-N Gasket Material

Made from a blend of carbon and Buna-N rubber, this material is unaffected by oil and temperatures up to 650° F.

Gasket Material Assortments

Each assortment includes a variety of materials to meet your gasketing needs.

Pipe Gaskets

Oil-Resistant Compressible Buna-N Pipe Gaskets

These compressible Buna-N rubber gaskets ensure a tight seal. They also resist water and salts.

Oil-Resistant Aramid/Buna-N Pipe Gaskets

In addition to oil, these blended aramid fiber/Buna-N rubber gaskets resist water and aliphatic hydrocarbons such as ethylene.

Oil-Resistant Aramid/Buna-N
Pipe Gaskets with Fasteners

Furnished with enough nuts and bolts to create a connection between two steel pipe flanges.

Chemical-Resistant Viton®
Fluoroelastomer Pipe Gaskets

Resistant to boric acid, citric acid, isopropyl alcohol, fuel, oil, and transmission fluid.

High-Temperature Graphite/Buna-N Pipe Gaskets

These gaskets are made from a blend of graphite and Buna-N rubber to withstand temperatures up to 650° F.

High-Temperature Oil-Resistant
Carbon/Buna-N Pipe Gaskets

These blended carbon/Buna-N rubber gaskets are unaffected by oil and temperatures up to 650° F.

Oil-Resistant Compressible Buna-N
Pipe Gaskets with Bolt Holes

Made of Buna-N rubber, these gaskets compress to ensure a tight seal. They resist oil, water, and salts.

Oil-Resistant Aramid/Buna-N
Pipe Gaskets with Bolt Holes

These blended aramid fiber/Buna-N rubber gaskets also resist water and aliphatic hydrocarbons such as ethylene.

Oil-Resistant Aramid/Buna-N Pipe
Gaskets with Bolt Holes and Fasteners

Each gasket comes with enough bolts and nuts to create a connection between two steel pipe flanges.

Chemical-Resistant Viton® Fluoroelastomer
Pipe Gaskets with Bolt Holes

These gaskets resist boric acid, citric acid, isopropyl alcohol, fuel, oil, and transmission fluid.

High-Temperature Graphite/Buna-N
Pipe Gaskets with Bolt Holes

Made from a blend of graphite and Buna-N rubber, these gaskets withstand temperatures up to 650° F.

High-Temperature Oil-Resistant
Carbon/Buna-N Pipe Gaskets with Bolt Holes

Carbon is blended with Buna-N rubber for gaskets that are unaffected by oil and temperatures up to 650° F.

Made-to-Order Oil-Resistant Aramid/Buna-N Gaskets

Also resist aliphatic hydrocarbons, such as ethylene.

Plastic and Rubber Tubing for Flow

Oil-Resistant Soft Rubber
Tubing for Fuel and Lubricants

With the best oil resistance of all our fuel and lubricant tubing, this tubing won’t deteriorate or become brittle when exposed to oil—even with long-term use.

High-Pressure Firm Plastic and
Rubber Tubing for Air and Water

A braid reinforcement gives this tubing excellent strength in high-pressure applications up to 250 psi.

Plastic and Rubber Tubing Material Sample Packs

These packs include individually marked pieces of tubing in a variety of materials.

Push-On Seals with Bulb

Oil-Resistant Push-On Seals with Bulb on Side

In addition to oil, these seals resist grease, salts, water, steam, and most detergents.

Oil-Resistant Rubber Push-On Seals with Bulb on Top

The Buna-N foam rubber bulb on these seals also resists grease, salts, water, steam, and most detergents.

About O-Rings

Raw Materials

Oil-Resistant Buna-N Rubber Sheets, Bars, and Strips

High-Strength Oil-ResistantBuna-N Rubber Sheets and Strips

Food Industry Oil-ResistantBuna-N Rubber Sheets and Strips

Oil-Resistant High-Temperature Buna-N Rubber Sheets

Ultra-Strength Oil-ResistantBuna-N Rubber Sheets and Strips

Food Industry Ultra-Strength Oil-ResistantBuna-N/Vinyl Rubber Sheets

Food Industry High-Strength Oil-ResistantBuna-N Rubber Sheets and Strips

Fabric-Reinforced Oil-Resistant Buna-N Rubber Sheets

Oil-Resistant Buna-N Rubber Rods

Oil-Resistant Buna-N Rubber Tubes

Oil-Resistant Buna-N Rubber Balls

Oil-Resistant Buna-N Foam Sheets and Strips

Oil-Resistant Blended Buna-N Foam Strips

Flame-Retardant Oil-Resistant BlendedBuna-N Foam Sheets and Strips

Oil-Resistant Buna-N O-Rings

Oil-Resistant Buna-N O-Rings

Oil-Resistant Soft Buna-N O-Rings

Oil-Resistant Hard Buna-N O-Rings

Oil-Resistant Hard Buna-N O-Rings for TubeFittings with Straight-Thread Connection

Made-to-Order Oil-Resistant Buna-N O-Rings

Square-Profile Oil-Resistant Buna-N O-Rings

X-Profile Oil-Resistant Buna-N O-Rings

Double X-Profile Oil-Resistant Buna-N O-Rings

Oil-Resistant Mil. Spec. Buna-N O-Rings

Oil-Resistant Metal-Detectable Buna-N O-Rings

Oil-Resistant Food Industry Buna-N O-Rings

Oil-Resistant O-Ring Cord Stock

Oil-Resistant Buna-N O-Ring Cord Stock

Oil-Resistant Soft Buna-N O-Ring Cord Stock

Oil-Resistant Hard Buna-N O-Ring Cord Stock

Square-Profile Oil-Resistant Buna-N O-Ring Cord Stock

X-Profile Oil-Resistant Buna-N O-Ring Cord Stock

Oil-Resistant Food Industry Buna-N O-Ring Cord Stock

O-Ring Assortments

Oil-Resistant Buna-N O-Ring Assortments

Oil-Resistant Soft Buna-N O-Ring Assortments

Oil-Resistant Hard Buna-N O-Ring Assortmentsfor Tube Fittings with Straight-Thread Connection

Oil-Resistant Hard Buna-N O-Ring Assortments

X-Profile Oil-Resistant Buna-N O-Ring Assortments

Square-Profile Oil-ResistantBuna-N O-Ring Assortments

Oil- and Chemical-Resistant O-Ring Assortments

O-Ring Bonding Kits

O-Ring Bonding Kits

Gasket Material

Oil-Resistant Compressible Buna-N Gasket Material

Oil-Resistant Food IndustryCompressible Buna-N Gasket Material

Oil-Resistant High-StrengthAramid/Buna-N Gasket Material

Oil-Resistant Aramid/Buna-N Gasket Material

Oil-Resistant Light Duty Cork/Buna-N Gasket Material

High-Temperature Oil-ResistantCarbon/Buna-N Gasket Material

Gasket Material Assortments

Pipe Gaskets

Oil-Resistant Compressible Buna-N Pipe Gaskets

Oil-Resistant Aramid/Buna-N Pipe Gaskets

Oil-Resistant Aramid/Buna-NPipe Gaskets with Fasteners

Chemical-Resistant Viton®Fluoroelastomer Pipe Gaskets

High-Temperature Graphite/Buna-N Pipe Gaskets

High-Temperature Oil-ResistantCarbon/Buna-N Pipe Gaskets

Oil-Resistant Compressible Buna-NPipe Gaskets with Bolt Holes

Oil-Resistant Aramid/Buna-NPipe Gaskets with Bolt Holes

Oil-Resistant Aramid/Buna-N PipeGaskets with Bolt Holes and Fasteners

Chemical-Resistant Viton® FluoroelastomerPipe Gaskets with Bolt Holes

High-Temperature Graphite/Buna-NPipe Gaskets with Bolt Holes

High-Temperature Oil-ResistantCarbon/Buna-N Pipe Gaskets with Bolt Holes

Made-to-Order Oil-Resistant Aramid/Buna-N Gaskets

Made-to-Order Oil-Resistant Aramid/Buna-N Gaskets

Plastic and Rubber Tubing for Flow

Oil-Resistant Soft RubberTubing for Fuel and Lubricants

High-Pressure Firm Plastic andRubber Tubing for Air and Water

Plastic and Rubber Tubing Material Sample Packs

Push-On Seals with Bulb

Oil-Resistant Push-On Seals with Bulb on Side

Oil-Resistant Rubber Push-On Seals with Bulb on Top

High-Strength Oil-Resistant
Buna-N Rubber Sheets and Strips

Food Industry Oil-Resistant
Buna-N Rubber Sheets and Strips

Ultra-Strength Oil-Resistant
Buna-N Rubber Sheets and Strips

Food Industry Ultra-Strength Oil-Resistant
Buna-N/Vinyl Rubber Sheets

Food Industry High-Strength Oil-Resistant
Buna-N Rubber Sheets and Strips

Flame-Retardant Oil-Resistant Blended
Buna-N Foam Sheets and Strips

Oil-Resistant Hard Buna-N O-Rings for Tube
Fittings with Straight-Thread Connection

Oil-Resistant Hard Buna-N O-Ring Assortments
for Tube Fittings with Straight-Thread Connection

Square-Profile Oil-Resistant
Buna-N O-Ring Assortments

Oil-Resistant Food Industry
Compressible Buna-N Gasket Material

Oil-Resistant High-Strength
Aramid/Buna-N Gasket Material

High-Temperature Oil-Resistant
Carbon/Buna-N Gasket Material

Oil-Resistant Aramid/Buna-N
Pipe Gaskets with Fasteners

Chemical-Resistant Viton®
Fluoroelastomer Pipe Gaskets

High-Temperature Oil-Resistant
Carbon/Buna-N Pipe Gaskets

Oil-Resistant Compressible Buna-N
Pipe Gaskets with Bolt Holes

Oil-Resistant Aramid/Buna-N
Pipe Gaskets with Bolt Holes

Oil-Resistant Aramid/Buna-N Pipe
Gaskets with Bolt Holes and Fasteners

Chemical-Resistant Viton® Fluoroelastomer
Pipe Gaskets with Bolt Holes

High-Temperature Graphite/Buna-N
Pipe Gaskets with Bolt Holes

High-Temperature Oil-Resistant
Carbon/Buna-N Pipe Gaskets with Bolt Holes

Oil-Resistant Soft Rubber
Tubing for Fuel and Lubricants

High-Pressure Firm Plastic and
Rubber Tubing for Air and Water