A back-up ring is a rigid ring that holds an elastomeric seal or plastic (such as Polyethylene) connection to its designed shape and in its correct place. Back up rings are commonly used with O-rings and lip seals.

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Item#:
8-321 N90

ID-1.187 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-1.187 CS-3/16
SPEC SHEET

Available:
128.00
Your Price:
0.86
Each
Item#:
8-322 N90

ID-1.25 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-1.25 CS-3/16
SPEC SHEET

Available:
55.00
Your Price:
0.90
Each
Item#:
8-323 N90

ID-1.312 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-1.312 CS-3/16
SPEC SHEET

Available:
120.00
Your Price:
0.93
Each
Item#:
8-324 N90

ID-1.375 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-1.375 CS-3/16
SPEC SHEET

Available:
159.00
Your Price:
0.99
Each
Item#:
8-325 N90

ID-1.5 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-1.5 CS-3/16
SPEC SHEET

Available:
87.00
Your Price:
1.07
Each
Item#:
8-326 N90

ID-1.625 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-1.625 CS-3/16
SPEC SHEET

Available:
930.00
Your Price:
1.13
Each
Item#:
8-327 N90

ID-1.75 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-1.75 CS-3/16
SPEC SHEET

Available:
39.00
Your Price:
1.22
Each
Item#:
8-328 N90

ID-1.875 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-1.875 CS-3/16
SPEC SHEET

Available:
146.00
Your Price:
1.30
Each
Item#:
8-329 N90

ID-2 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-2 CS-3/16
SPEC SHEET

Available:
116.00
Your Price:
1.47
Each
Item#:
8-330 N90

ID-2.125 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-2.125 CS-3/16
SPEC SHEET

Available:
811.00
Your Price:
1.56
Each
Item#:
8-331 N90

ID-2.25 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-2.25 CS-3/16
SPEC SHEET

Available:
147.00
Your Price:
1.58
Each
Item#:
8-332 N90

ID-2.375 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-2.375 CS-3/16
SPEC SHEET

Available:
308.00
Your Price:
1.66
Each
Item#:
8-333 N90

ID-2.5 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-2.5 CS-3/16
SPEC SHEET

Available:
83.00
Your Price:
1.71
Each
Item#:
8-334 N90

ID-2.625 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-2.625 CS-3/16
SPEC SHEET

Available:
187.00
Your Price:
1.75
Each
Item#:
8-335 N90

ID-2.75 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-2.75 CS-3/16
SPEC SHEET

Available:
171.00
Your Price:
1.93
Each
Item#:
8-336 N90

ID-2.875 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-2.875 CS-3/16
SPEC SHEET

Available:
343.00
Your Price:
1.94
Each
Item#:
8-337 N90

ID-3 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-3 CS-3/16
SPEC SHEET

Available:
207.00
Your Price:
1.96
Each
Item#:
8-338 N90

ID-3.125 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-3.125 CS-3/16
SPEC SHEET

Available:
1714.00
Your Price:
1.98
Each
Item#:
8-339 N90

ID-3.25 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-3.25 CS-3/16
SPEC SHEET

Available:
185.00
Your Price:
2.17
Each
Item#:
8-340 N90

ID-3.375 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-3.375 CS-3/16
SPEC SHEET

Available:
45.00
Your Price:
2.34
Each
Item#:
8-341 N90

ID-3.5 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-3.5 CS-3/16
SPEC SHEET

Available:
465.00
Your Price:
2.32
Each
Item#:
8-342 N90

ID-3.625 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-3.625 CS-3/16
SPEC SHEET

Available:
658.00
Your Price:
2.44
Each
Item#:
8-343 N90

ID-3.75 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-3.75 CS-3/16
SPEC SHEET

Available:
81.00
Your Price:
2.72
Each
Item#:
8-344 N90

ID-3.875 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-3.875 CS-3/16
SPEC SHEET

Available:
203.00
Your Price:
2.97
Each
Item#:
8-345 N90

ID-4 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-4 CS-3/16
SPEC SHEET

Available:
338.00
Your Price:
3.09
Each
Item#:
8-346 N90

ID-4.125 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-4.125 CS-3/16
SPEC SHEET

Available:
51.00
Your Price:
3.21
Each
Item#:
8-347 N90

ID-4.25 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-4.25 CS-3/16
SPEC SHEET

Available:
83.00
Your Price:
3.24
Each
Item#:
8-348 N90

ID-4.375 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-4.375 CS-3/16
SPEC SHEET

Available:
109.00
Your Price:
3.41
Each
Item#:
8-349 N90

ID-4.5 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-4.5 CS-3/16
SPEC SHEET

Available:
364.00
Your Price:
3.42
Each
Item#:
8-350 N90

ID-4.625 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-4.625 CS-3/16
SPEC SHEET

Available:
384.00
Your Price:
3.67
Each
Item#:
8-351 N90

ID-4.75 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-4.75 CS-3/16
SPEC SHEET

Available:
14.00
Your Price:
3.84
Each
Item#:
8-352 N90

ID-4.875 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-4.875 CS-3/16
SPEC SHEET

Available:
14.00
Your Price:
3.86
Each
Item#:
8-353 N90

ID-5 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-5 CS-3/16
SPEC SHEET

Available:
35.00
Your Price:
3.99
Each
Item#:
8-354 N90

ID-5.125 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-5.125 CS-3/16
SPEC SHEET

Available:
100.00
Your Price:
4.45
Each
Item#:
8-355 N90

ID-5.25 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-5.25 CS-3/16
SPEC SHEET

Available:
14.00
Your Price:
4.70
Each
Item#:
8-356 N90

ID-5.375 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

Hydraulic SealAlternative Seals: 19-, 51-, MS28774, MS27595, MS28782, MS28783

ID-5.375 CS-3/16
SPEC SHEET

Available:
27.00
Your Price:
4.84
Each
|◀ ◀ 397 - 432 of 1584 ▶ ▶|
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