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HERCULES URETHANE BACKUP Ring 90A DUROMETER

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Description & Features

This Hercules Sealing Products backup ring is made from 90A durometer urethane, providing reliable support and preventing extrusion in demanding hydraulic applications.

The HERCULES URETHANE BACKUP Ring 90A DUROMETER is designed to withstand high pressures and maintain sealing integrity. It is suitable for use with various hydraulic fluids and is compatible with standard groove dimensions.

SKU: 575-352

Supplier Part Number (MPN): 575-352

Alternate Part Numbers: C1BV61, MI-01263798, MINO-00407X80424

Specifications

Brand
HERCULES® SEALING PRODUCTS
Dash Size
352
Durometer
95A
Inside Diameter
4-7/8 in
Material
Urethane
Series
575 Series
Suitable For Use With
Hydraulic and Pneumatic Cylinders
System of Measurement
Imperial

Similar Products

Model Number Dash Size Inside Diameter Outside Diameter Thickness Price Action
90A Durometer Urethane Back-Up Rings -018 Dash Size, Per Pack

575-018 90A Urethane Back-Up Ring

18

3/4 in

90A Durometer Urethane Back-Up Rings -221 Dash Size, Per Pack

575-221 90A Urethane Back-Up Ring

221

90A Durometer Urethane Back-Up Rings -222 Dash Size, Per Pack

575-222 90A Urethane Back-Up Ring

222

1-1/2 in

90A Durometer Urethane Back-Up Rings -345 Dash Size, Per Pack

575-345 90A Urethane Back-Up Ring

345

90A Durometer Urethane Back-Up Rings -215 Dash Size, Per Pack

575-215 90A Urethane Back-Up Ring

215

1-1/16 in

90A Durometer Urethane Back-Up Rings -427 Dash Size, Per Pack

575-427 90A Urethane Back-Up Ring

427

90A Durometer Urethane Back-Up Rings -342 Dash Size, Per Pack

575-342 90A Urethane Back-Up Ring

342

90A Durometer Urethane Back-Up Rings -011 Dash Size, Per Pack

575-011 90A Urethane Back-Up Ring

11

0.31 in

90A Durometer Urethane Back-Up Rings -016 Dash Size, Per Pack

575-016 90A Urethane Back-Up Ring

16

5/8 in

90A Durometer Urethane Back-Up Rings -436 Dash Size, Per Pack

575-436 90A Urethane Back-Up Ring

436

90A Durometer Urethane Back-Up Rings -259 Dash Size, Per Pack

575-259 90A Urethane Back-Up Ring

259

90A Durometer Urethane Back-Up Rings -140 Dash Size, Per Pack

575-140 90A Urethane Back-Up Ring

140

90A Durometer Urethane Back-Up Rings -020 Dash Size, Per Pack

575-020 90A Urethane Back-Up Ring

20

1 in

90A Durometer Urethane Back-Up Rings -135 Dash Size, Per Pack

575-135 90A Urethane Back-Up Ring

135

90A Durometer Urethane Back-Up Rings -214 Dash Size, Per Pack

575-214 90A Urethane Back-Up Ring

214

1 in

90A Durometer Urethane Back-Up Rings -124 Dash Size, Per Pack

575-124 90A Urethane Back-Up Ring

124

1-1/4 in

90A Durometer Urethane Back-Up Rings -245 Dash Size, Per Pack

575-245 90A Urethane Back-Up Ring

245

90A Durometer Urethane Back-Up Rings -429 Dash Size, Per Pack

575-429 90A Urethane Back-Up Ring

429

90A Durometer Urethane Back-Up Rings -117 Dash Size, Per Pack

575-117 90A Urethane Back-Up Ring

117

0.81 in

1 in

90A Durometer Urethane Back-Up Rings -151 Dash Size, Per Pack

575-151 90A Urethane Back-Up Ring

151

3 in

90A Durometer Urethane Back-Up Rings -218 Dash Size, Per Pack

575-218 90A Urethane Back-Up Ring

218

1-1/4 in

90A Durometer Urethane Back-Up Rings -132 Dash Size, Per Pack

575-132 90A Urethane Back-Up Ring

132

1-3/4 in

90A Durometer Urethane Back-Up Rings -226 Dash Size, Per Pack

575-226 90A Urethane Back-Up Ring

226

90A Durometer Urethane Back-Up Rings -125 Dash Size, Per Pack

575-125 90A Urethane Back-Up Ring

125

1-5/16 in

90A Durometer Urethane Back-Up Rings -258 Dash Size, Per Pack

575-258 90A Urethane Back-Up Ring

258

90A Durometer Urethane Back-Up Rings -253 Dash Size, Per Pack

575-253 90A Urethane Back-Up Ring

253

90A Durometer Urethane Back-Up Rings -021 Dash Size, Per Pack

575-021 90A Urethane Back-Up Ring

21

90A Durometer Urethane Back-Up Rings -240 Dash Size, Per Pack

575-240 90A Urethane Back-Up Ring

240

90A Durometer Urethane Back-Up Rings -232 Dash Size, Per Pack

575-232 90A Urethane Back-Up Ring

232

90A Durometer Urethane Back-Up Rings -012 Dash Size, Per Pack

575-012 90A Urethane Back-Up Ring

12

0.38 in

90A Durometer Urethane Back-Up Rings -229 Dash Size, Per Pack

575-229 90A Urethane Back-Up Ring

229

90A Durometer Urethane Back-Up Rings -145 Dash Size, Per Pack

575-145 90A Urethane Back-Up Ring

145

90A Durometer Urethane Back-Up Rings -316 Dash Size, Per Pack

575-316 90A Urethane Back-Up Ring

316

90A Durometer Urethane Back-Up Rings -114 Dash Size, Per Pack

575-114 90A Urethane Back-Up Ring

114

5/8 in

90A Durometer Urethane Back-Up Rings -244 Dash Size, Per Pack

575-244 90A Urethane Back-Up Ring

244

90A Durometer Urethane Back-Up Rings -154 Dash Size, Per Pack

575-154 90A Urethane Back-Up Ring

154

90A Durometer Urethane Back-Up Rings -336 Dash Size, Per Pack

575-336 90A Urethane Back-Up Ring

336

90A Durometer Urethane Back-Up Rings -116 Dash Size, Per Pack

575-116 90A Urethane Back-Up Ring

116

3/4 in

90A Durometer Urethane Back-Up Rings -346 Dash Size, Per Pack

575-346 90A Urethane Back-Up Ring

346

90A Durometer Urethane Back-Up Rings -255 Dash Size, Per Pack

575-255 90A Urethane Back-Up Ring

255

90A Durometer Urethane Back-Up Rings -329 Dash Size, Per Pack

575-329 90A Urethane Back-Up Ring

329

90A Durometer Urethane Back-Up Rings -223 Dash Size, Per Pack

575-223 90A Urethane Back-Up Ring

223

1-5/8 in

90A Durometer Urethane Back-Up Rings -350 Dash Size, Per Pack

575-350 90A Urethane Back-Up Ring

350

90A Durometer Urethane Back-Up Rings -341 Dash Size, Per Pack

575-341 90A Urethane Back-Up Ring

341

90A Durometer Urethane Back-Up Rings -338 Dash Size, Per Pack

575-338 90A Urethane Back-Up Ring

338

90A Durometer Urethane Back-Up Rings -235 Dash Size, Per Pack

575-235 90A Urethane Back-Up Ring

235

90A Durometer Urethane Back-Up Rings -211 Dash Size, Per Pack

575-211 90A Urethane Back-Up Ring

211

0.81 in

90A Durometer Urethane Back-Up Rings -213 Dash Size, Per Pack

575-213 90A Urethane Back-Up Ring

213

90A Durometer Urethane Back-Up Rings -330 Dash Size, Per Pack

575-330 90A Urethane Back-Up Ring

330

2-1/8 in

90A Durometer Urethane Back-Up Rings -340 Dash Size, Per Pack

575-340 90A Urethane Back-Up Ring

340

90A Durometer Urethane Back-Up Rings -236 Dash Size, Per Pack

575-236 90A Urethane Back-Up Ring

236

90A Durometer Urethane Back-Up Rings -133 Dash Size, Per Pack

575-133 90A Urethane Back-Up Ring

133

1.81 in

90A Durometer Urethane Back-Up Rings -324 Dash Size, Per Pack

575-324 90A Urethane Back-Up Ring

324

1.38 in

90A Durometer Urethane Back-Up Rings -243 Dash Size, Per Pack

575-243 90A Urethane Back-Up Ring

243

90A Durometer Urethane Back-Up Rings -328 Dash Size, Per Pack

575-328 90A Urethane Back-Up Ring

328

90A Durometer Urethane Back-Up Rings -349 Dash Size, Per Pack

575-349 90A Urethane Back-Up Ring

349

90A Durometer Urethane Back-Up Rings -128 Dash Size, Per Pack

575-128 90A Urethane Back-Up Ring

128

1-1/2 in

90A Durometer Urethane Back-Up Rings -038 Dash Size, Per Pack

575-038 90A Urethane Back-Up Ring

38

90A Durometer Urethane Back-Up Rings -210 Dash Size, Per Pack

575-210 90A Urethane Back-Up Ring

210

3/4 in

1 in

90A Durometer Urethane Back-Up Rings -261 Dash Size, Per Pack

575-261 90A Urethane Back-Up Ring

261

90A Durometer Urethane Back-Up Rings -242 Dash Size, Per Pack

575-242 90A Urethane Back-Up Ring

242

90A Durometer Urethane Back-Up Rings -252 Dash Size, Per Pack

575-252 90A Urethane Back-Up Ring

252

90A Durometer Urethane Back-Up Rings -358 Dash Size, Per Pack

575-358 90A Urethane Back-Up Ring

358

90A Durometer Urethane Back-Up Rings -234 Dash Size, Per Pack

575-234 90A Urethane Back-Up Ring

234

3 in

90A Durometer Urethane Back-Up Rings -335 Dash Size, Per Pack

575-335 90A Urethane Back-Up Ring

335

90A Durometer Urethane Back-Up Rings -120 Dash Size, Per Pack

575-120 90A Urethane Back-Up Ring

120

1 in

90A Durometer Urethane Back-Up Rings -111 Dash Size, Per Pack

575-111 90A Urethane Back-Up Ring

111

0.44 in

90A Durometer Urethane Back-Up Rings -241 Dash Size, Per Pack

575-241 90A Urethane Back-Up Ring

241

90A Durometer Urethane Back-Up Rings -209 Dash Size, Per Pack

575-209 90A Urethane Back-Up Ring

209

0.69 in

90A Durometer Urethane Back-Up Rings -249 Dash Size, Per Pack

575-249 90A Urethane Back-Up Ring

249

4-7/8 in

90A Durometer Urethane Back-Up Rings -030 Dash Size, Per Pack

575-030 90A Urethane Back-Up Ring

30

1-5/8 in

90A Durometer Urethane Back-Up Rings -136 Dash Size, Per Pack

575-136 90A Urethane Back-Up Ring

136

90A Durometer Urethane Back-Up Rings -433 Dash Size, Per Pack

575-433 90A Urethane Back-Up Ring

433

90A Durometer Urethane Back-Up Rings -022 Dash Size, Per Pack

575-022 90A Urethane Back-Up Ring

22

1 in

90A Durometer Urethane Back-Up Rings -434 Dash Size, Per Pack

575-434 90A Urethane Back-Up Ring

434

90A Durometer Urethane Back-Up Rings -233 Dash Size, Per Pack

575-233 90A Urethane Back-Up Ring

233

90A Durometer Urethane Back-Up Rings -325 Dash Size, Per Pack

575-325 90A Urethane Back-Up Ring

325

1-1/2 in

90A Durometer Urethane Back-Up Rings -149 Dash Size, Per Pack

575-149 90A Urethane Back-Up Ring

149

90A Durometer Urethane Back-Up Rings -212 Dash Size, Per Pack

575-212 90A Urethane Back-Up Ring

212

90A Durometer Urethane Back-Up Rings -155 Dash Size, Per Pack

575-155 90A Urethane Back-Up Ring

155

90A Durometer Urethane Back-Up Rings -231 Dash Size, Per Pack

575-231 90A Urethane Back-Up Ring

231

90A Durometer Urethane Back-Up Rings -239 Dash Size, Per Pack

575-239 90A Urethane Back-Up Ring

239

90A Durometer Urethane Back-Up Rings -029 Dash Size, Per Pack

575-029 90A Urethane Back-Up Ring

29

1-1/2 in

90A Durometer Urethane Back-Up Rings -337 Dash Size, Per Pack

575-337 90A Urethane Back-Up Ring

337

3 in

90A Durometer Urethane Back-Up Rings -225 Dash Size, Per Pack

575-225 90A Urethane Back-Up Ring

225

90A Durometer Urethane Back-Up Rings -247 Dash Size, Per Pack

575-247 90A Urethane Back-Up Ring

247

90A Durometer Urethane Back-Up Rings -157 Dash Size, Per Pack

575-157 90A Urethane Back-Up Ring

157

90A Durometer Urethane Back-Up Rings -112 Dash Size, Per Pack

575-112 90A Urethane Back-Up Ring

112

1/2 in

90A Durometer Urethane Back-Up Rings -141 Dash Size, Per Pack

575-141 90A Urethane Back-Up Ring

141

90A Durometer Urethane Back-Up Rings -228 Dash Size, Per Pack

575-228 90A Urethane Back-Up Ring

228

90A Durometer Urethane Back-Up Rings -432 Dash Size, Per Pack

575-432 90A Urethane Back-Up Ring

432

90A Durometer Urethane Back-Up Rings -348 Dash Size, Per Pack

575-348 90A Urethane Back-Up Ring

348

90A Durometer Urethane Back-Up Rings -220 Dash Size, Per Pack

575-220 90A Urethane Back-Up Ring

220

1.38 in

90A Durometer Urethane Back-Up Rings -339 Dash Size, Per Pack

575-339 90A Urethane Back-Up Ring

339

90A Durometer Urethane Back-Up Rings -425 Dash Size, Per Pack

575-425 90A Urethane Back-Up Ring

425

90A Durometer Urethane Back-Up Rings -327 Dash Size, Per Pack

575-327 90A Urethane Back-Up Ring

327

1-3/4 in

90A Durometer Urethane Back-Up Rings -126 Dash Size, Per Pack

575-126 90A Urethane Back-Up Ring

126

1.38 in

90A Durometer Urethane Back-Up Rings -256 Dash Size, Per Pack

575-256 90A Urethane Back-Up Ring

256

90A Durometer Urethane Back-Up Rings -326 Dash Size, Per Pack

575-326 90A Urethane Back-Up Ring

326

1-5/8 in

90A Durometer Urethane Back-Up Rings -332 Dash Size, Per Pack

575-332 90A Urethane Back-Up Ring

332

90A Durometer Urethane Back-Up Rings -254 Dash Size, Per Pack

575-254 90A Urethane Back-Up Ring

254

90A Durometer Urethane Back-Up Rings -216 Dash Size, Per Pack

575-216 90A Urethane Back-Up Ring

216

1-1/8 in

90A Durometer Urethane Back-Up Rings -119 Dash Size, Per Pack

575-119 90A Urethane Back-Up Ring

119

90A Durometer Urethane Back-Up Rings -219 Dash Size, Per Pack

575-219 90A Urethane Back-Up Ring

219

1-5/16 in

90A Durometer Urethane Back-Up Rings -121 Dash Size, Per Pack

575-121 90A Urethane Back-Up Ring

121

1-1/16 in

90A Durometer Urethane Back-Up Rings -137 Dash Size, Per Pack

575-137 90A Urethane Back-Up Ring

137

2-1/16 in

90A Durometer Urethane Back-Up Rings -246 Dash Size, Per Pack

575-246 90A Urethane Back-Up Ring

246

90A Durometer Urethane Back-Up Rings -118 Dash Size, Per Pack

575-118 90A Urethane Back-Up Ring

118

90A Durometer Urethane Back-Up Rings -248 Dash Size, Per Pack

575-248 90A Urethane Back-Up Ring

248

90A Durometer Urethane Back-Up Rings -115 Dash Size, Per Pack

575-115 90A Urethane Back-Up Ring

115

0.69 in

90A Durometer Urethane Back-Up Rings -237 Dash Size, Per Pack

575-237 90A Urethane Back-Up Ring

237

90A Durometer Urethane Back-Up Rings -439 Dash Size, Per Pack

575-439 90A Urethane Back-Up Ring

439

90A Durometer Urethane Back-Up Rings -110 Dash Size, Per Pack

575-110 90A Urethane Back-Up Ring

110

0.38 in

90A Durometer Urethane Back-Up Rings -122 Dash Size, Per Pack

575-122 90A Urethane Back-Up Ring

122

1-1/8 in

90A Durometer Urethane Back-Up Rings -262 Dash Size, Per Pack

575-262 90A Urethane Back-Up Ring

262

90A Durometer Urethane Back-Up Rings -230 Dash Size, Per Pack

575-230 90A Urethane Back-Up Ring

230

2-1/2 in

90A Durometer Urethane Back-Up Rings -314 Dash Size, Per Pack

575-314 90A Urethane Back-Up Ring

314

3/4 in

90A Durometer Urethane Back-Up Rings -217 Dash Size, Per Pack

575-217 90A Urethane Back-Up Ring

217

1-3/16 in

90A Durometer Urethane Back-Up Rings -238 Dash Size, Per Pack

575-238 90A Urethane Back-Up Ring

238

90A Durometer Urethane Back-Up Rings -260 Dash Size, Per Pack

575-260 90A Urethane Back-Up Ring

260

90A Durometer Urethane Back-Up Rings -321 Dash Size, Per Pack

575-321 90A Urethane Back-Up Ring

321

1-3/16 in

90A Durometer Urethane Back-Up Rings -227 Dash Size, Per Pack

575-227 90A Urethane Back-Up Ring

227

2-1/8 in

90A Durometer Urethane Back-Up Rings -224 Dash Size, Per Pack

575-224 90A Urethane Back-Up Ring

224

1-3/4 in

90A Durometer Urethane Back-Up Rings -017 Dash Size, Per Pack

575-017 90A Urethane Back-Up Ring

17

0.69 in

90A Durometer Urethane Back-Up Rings -347 Dash Size, Per Pack

575-347 90A Urethane Back-Up Ring

347

90A Durometer Urethane Back-Up Rings -344 Dash Size, Per Pack

575-344 90A Urethane Back-Up Ring

344

90A Durometer Urethane Back-Up Rings -331 Dash Size, Per Pack

575-331 90A Urethane Back-Up Ring

331

90A Durometer Urethane Back-Up Rings -334 Dash Size, Per Pack

575-334 90A Urethane Back-Up Ring

334

90A Durometer Urethane Back-Up Rings -014 Dash Size, Per Pack

575-014 90A Urethane Back-Up Ring

14

1/2 in

90A Durometer Urethane Back-Up Rings -333 Dash Size, Per Pack

575-333 90A Urethane Back-Up Ring

333

2-1/2 in

90A Durometer Urethane Back-Up Rings -129 Dash Size, Per Pack

575-129 90A Urethane Back-Up Ring

129

90A Durometer Urethane Back-Up Rings -015 Dash Size, Per Pack

575-015 90A Urethane Back-Up Ring

15

0.56 in

90A Durometer Urethane Back-Up Rings -208 Dash Size, Per Pack

575-208 90A Urethane Back-Up Ring

208

5/8 in

90A Durometer Urethane Back-Up Rings -113 Dash Size, Per Pack

575-113 90A Urethane Back-Up Ring

113

0.56 in

90A Durometer Urethane Back-Up Rings -127 Dash Size, Per Pack

575-127 90A Urethane Back-Up Ring

127

HERCULES URETHANE BACKUP Ring 90A DUROMETER

575-032

32

HERCULES URETHANE BACKUP Ring 90A DUROMETER

575-123

123

1-3/16 in

HERCULES URETHANE BACKUP Ring 90A DUROMETER

575-250

250

HERCULES URETHANE BACKUP Ring 90A DUROMETER

575-318

318

1 in

HERCULES 95A DUROMETER URETHANE BACKUP RING

575-319

319

1-1/16 in

HERCULES URETHANE BACKUP Ring 90A DUROMETER

575-443

443

7-1/2 in

HERCULES URETHANE BACKUP Ring 90A DUROMETER

575-448

448

Product Questions & Answers (1)

Question by: Freddie A on Aug 7, 2025, 7:13 PM
backup ring like this one, is the 90A durometer rating gonna hold up in a standard hydraulic cylinder without extruding under pressure?
Answer by: Customer Support on Aug 9, 2025, 6:21 AM
90A durometer urethane is a pretty firm material, which is exactly what you want in a backup ring. Its whole job is to keep the primary seal from pushing into the clearance gap under pressure. Urethane at that hardness handles that role well in typical hydraulic cylinder applications without cold-flowing or deforming the way softer materials tend to.

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