6-4
Parker Hannifi n Corporation • O-Ring Division
2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
Back-Up Rings
Parker O-Ring Handbook
I.D.W
T Ref.
A
.010 R. Max.
Section W-W
A
R
Parker Parbak
8-Series Dimensions
Notes: 1. Parbak sizes are designed to correspond with the Parker 2-xxx, 3-xxx and AS568A series O-ring with which they are used.
2. Complete call-out consists of the digit 8, the dash number for the size wanted and the rubber material. Example: N1444-90 8-009.
Table 6-1: Parker Parbak 8-Series Dimensions
Parker Parbaks were developed primarily for service in petro-
leum based hydraulic fl uids, at -4°C to 121°C (-40°F to 250°F).
Parker’s standard Parbak compound N1444-90, provides the
maximum benefi ts in back-up ring service. Compounds for
use in other fl uids and for temperatures up to 204°C (400°F)
are available upon request.
Parbaks will stretch up to 50%, and are quickly and easily
installed. Advantages of the contour design are obtained
regardless of how Parbaks are installed — they may be in-
stalled with the concave face in either direction, toward or
away from the O-ring.
004 .096 .005 .087 .049 .045 .003 .053 .003
005 .127
006 .140
007 .171
008 .202
009 .234
010 .265
011 .327
012 .390
013 .455 .005
014 .518 .005
015 .580 .007
016 .643 .009
017 .705
018 .768
019 .830
020 .893
021 .955 .009
022 1.018 .010
023 1.080 .010
024 1.143 .010
025 1.205 .011
026 1.268 .011
027 1.330 .011
028 1.393 .013
029 1.518 .013
030 1.643 .013
031 1.768 .015
032 1.893 .015
033 2.018 .018
034 2.143
035 2.268
036 2.393
037 2.518 .018
038 2.643 .020
039 2.768 .020
040 2.893 .020 .087 .049 .045 .003 .053 .003
041 3.018 .024 .087 .049 .045 .003 .053 .003
042 3.268 .024
043 3.518 .024
044 3.768 .027
045 4.018 .027
046 4.268 .030
047 4.518 .030
048 4.768 .030
049 5.018 .037
050 5.268 .037 .087 .049 .053
102 .077 .005 .129 .053 .086
103 .109
104 .140
105 .171
106 .202
107 .234
108 .265
109 .327
110 .390
111 .452
112 .515 .005
113 .577 .007
114 .640 .009
115 .702 .009
116 .765 .009
117 .831 .010
118 .893
119 .956
120 1.018
121 1.081
122 1.143 .010
123 1.206 .012
124 1.268
125 1.331
126 1.393
127 1.456
128 1.518 .012 .129 .053 .045 .003 .086 .003
Parker Parbak 8-Series Dimensions
Dash
No.
I.D.
(in.)
Tol.
±
R
±.010
T
(Ref.)
A
(in.)
Tol.
±
W
(in.)
Tol.
±
Dash
No.
I.D.
(in.)
Tol.
±
R
±.010
T
(Ref.)
A
(in.)
Tol.
±
W
(in.)
Tol.
±
Next >
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Section Contents
6-5
Back-Up Rings
Parker Hannifi n Corporation • O-Ring Division
2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
Parker O-Ring Handbook
Notes: 1. Parbak sizes are designed to correspond with the Parker 2-xxx, 3-xxx and AS568A series O-ring with which they are used.
2. Complete call-out consists of the digit 8, the dash number for the size wanted and the rubber material. Example: N1444-90 8-009.
Table 6-1: Parker Parbak 8-Series Dimensions
129 1.581 .015 .129 .053 .045 .003 .086 .003
130 1.643
131 1.706
132 1.768
133 1.831
134 1.893 .015
135 1.956 .017
136 2.018
137 2.081
138 2.143 .017
139 2.206 .017
140 2.268 .017
141 2.331 .020
142 2.393
143 2.456
144 2.518
145 2.581
146 2.643 .020
147 2.706 .022
148 2.768
149 2.831
150 2.893 .022
151 3.018 .024
152 3.268 .024
153 3.518 .024
154 3.768 .028
155 4.018 .028
156 4.268 .030
157 4.518 .030
158 4.768 .030
159 5.018 .035
160 5.268
161 5.518
162 5.768
163 6.018 .035
164 6.268 .040
165 6.518
166 6.768
167 7.018 .040
168 7.268 .045
169 7.518
170 7.768
171 8.018 .045
172 8.268 .050
173 8.518
174 8.768
175 9.018 .050
176 9.268 .055
177 9.518 .055
178 9.768 .055 .129 .053 .045 .086 .003
201 .202 .005 .174 .050 .040 .118 .004
202 .265
203 .327
204 .390
205 .455 .005 .174 .050 .040 .003 .118 .004
206 .518 .005 .174 .050 .040 .003 .118 .004
207 .580 .007
208 .643 .009
209 .705 .009
210 .766 .010
211 .828
212 .891
213 .953
214 1.016 .010
215 1.078 .010
216 1.141 .012
217 1.203
218 1.266
219 1.334
220 1.397
221 1.459 .012
222 1.522 .015
223 1.647 .015
224 1.772 .015
225 1.897 .018
226 2.022 .018
227 2.147 .018
228 2.272 .020
229 2.397 .020
230 2.522 .020
231 2.631 .020
232 2.756 .024
233 2.881
234 3.006
235 3.131
236 3.256
237 3.381
238 3.506 .024
239 3.631 .028
240 3.756
241 3.881
242 4.006
243 4.131 .028
244 4.256 .030
245 4.381
246 4.506
247 4.631
248 4.768 .030
249 4.893 .035
250 5.018
251 5.143
252 5.268
253 5.393
254 5.518
255 5.643
256 5.768
257 5.893
258 6.018 .035
259 6.268 .040
260 6.518 .040
261 6.768 .040 .174 .050 .040 .003 .118 .004
Parker Parbak 8-Series Dimensions (Continued)
Dash
No.
I.D.
(in.)
Tol.
±
R
±.010
T
(Ref.)
A
(in.)
Tol.
±
W
(in.)
Tol.
±
Dash
No.
I.D.
(in.)
Tol.
±
R
±.010
T
(Ref.)
A
(in.)
Tol.
±
W
(in.)
Tol.
±
Next >
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Section Contents
6-6
Parker Hannifi n Corporation • O-Ring Division
2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
Back-Up Rings
Parker O-Ring Handbook
Notes: 1. Parbak sizes are designed to correspond with the Parker 2-xxx, 3-xxx and AS568A series O-ring with which they are used.
2. Complete call-out consists of the digit 8, the dash number for the size wanted and the rubber material. Example: N1444-90 8-009.
Table 6-1: Parker Parbak 8-Series Dimensions
262 7.018 .040 .174 .050 .040 .003 .118 .004
263 7.268 .045
264 7.518
265 7.768
266 8.018 .045
267 8.268 .050
268 8.518
269 8.768
270 9.018 .050
271 9.268 .055
272 9.518 .055
273 9.768 .055
274
10.018
.055
275
10.518
.055
276
11.018
.065
277
11.518
278
12.018
279
13.018
280
14.018
281
15.018
.065
282
15.989
.075
283
16.989
.080
284
17.989
.085 .174 .050 .040 .003 .118 .004
309 .450 .005 .262 .076 .060 .004 .183 .005
310 .513 .005
311 .575 .007
312 .638 .009
313 .700 .009
314 .763 .010
315 .825
316 .888
317 .950
318 1.013
319 1.075 .010
320 1.138 .012
321 1.200 .012
322 1.263 .012
323 1.316 .012
324 1.388 .012
325 1.513 .015
326 1.638
327 1.763
328 1.888 .015
329 2.013 .018
330 2.138
331 2.268
332 2.393 .018
333 2.518 .020
334 2.643 .020
335 2.768 .020
336 2.893 .020
337 3.018 .024
338 3.143
339 3.273
340 3.398 .024 .262 .076 .060 .004 .183 .005
341 3.523 .024 .262 .076 .060 .004 .183 .005
342 3.648 .028
343 3.773
344 3.898
345 4.028
346 4.153 .028
347 4.278 .030
348 4.403
349 4.528
350 4.653
351 4.778
352 4.903 .030
353 5.028 .037
354 5.153 .037
355 5.278 .037
356 5.403 .037
357 5.528
358 5.653
359 5.778
360 5.903
361 6.028 .037
362 6.278 .040
363 6.528
364 6.778
365 7.028 .040
366 7.278 .045
367 7.528
368 7.778
369 8.028 .045
370 8.278 .050
371 8.528
372 8.778
373 9.028 .050
374 9.278 .055
375 9.528
376 9.778
377
10.028
.055
378
10.528
.060
379
11.028
.060
380
11.528
.065
381
12.028
.065
382
13.028
.065
383
14.028
.070
384
15.028
.070
385
16.008
.075
386
17.008
.080
387
18.008
.085
388
19.006
.090
389
20.006
.095
390
21.006
.095
391
22.006
.100
392
22.993
.105
393
23.993
.110
394
24.993
.115
395
25.993
.120 .262 .076 .060 .004 .183 .005
Parker Parbak 8-Series Dimensions (Continued)
Dash
No.
I.D.
(in.)
Tol.
±
R
±.010
T
(Ref.)
A
(in.)
Tol.
±
W
(in.)
Tol.
±
Dash
No.
I.D.
(in.)
Tol.
±
R
±.010
T
(Ref.)
A
(in.)
Tol.
±
W
(in.)
Tol.
±
Next >
Table of Contents
Search
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Section Contents
6-7
Back-Up Rings
Parker Hannifi n Corporation • O-Ring Division
2360 Palumbo Drive, Lexington, KY 40509
Phone: (859) 269-2351 • Fax: (859) 335-5128
www.parkerorings.com
Parker O-Ring Handbook
Notes: 1. Parbak sizes are designed to correspond with the Parker 2-xxx, 3-xxx and AS568A series O-ring with which they are used.
2. Complete call-out consists of the digit 8, the dash number for the size wanted and the rubber material. Example: N1444-90 8-009.
Table 6-1: Parker Parbak 8-Series Dimensions
425 4.551 .033 .344 .117 .096 .005 .236 .006
426 4.676
427 4.801
428 4.926 .033
429 5.051 .037
430 5.176
431 5.301
432 5.426
433 5.551
434 5.676
435 5.801
436 5.926
437 6.051 .037
438 6.274 .040
439 6.524
440 6.774
441 7.024 .040
442 7.274 .045
443 7.524
444 7.774
445 8.024 .045
446 8.524 .055
447 9.024
448 9.524
449
10.024
.055
450
10.524
.060 .344 .117 .096 .005 .236 .006
451
11.024
.060 .344 .117 .096 .005 .236 .006
452
11.524
453
12.024
454
12.524
455
13.024
.060
456
13.524
.070
457
14.024
458
14.524
459
15.024
460
15.524
.070
461
16.004
.075
462
16.504
.075
463
17.004
.080
464
17.504
.085
465
18.004
.085
466
18.504
.085
467
19.004
.090
468
19.504
.090
469
20.004
.095
470
21.004
.095
471
22.004
.100
472
23.004
.105
473
24.004
.110
474
25.004
.115
475
26.004
.120 .344 .117 .096 .005 .236 .006
Parker Parbak 8-Series Dimensions (Continued)
Dash
No.
I.D.
(in.)
Tol.
±
R
±.010
T
(Ref.)
A
(in.)
Tol.
±
W
(in.)
Tol.
±
Dash
No.
I.D.
(in.)
Tol.
±
R
±.010
T
(Ref.)
A
(in.)
Tol.
±
W
(in.)
Tol.
±
Next >
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Section Contents