Backup Rings | Allegheny York

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Home > BACKUP RINGS

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, lip seals, and as reciprocating shaft seals

|◀ ◀ 397 - 432 of 1638 ▶ ▶|

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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:

213.00

Your Price:

1.26

Each

Qty:

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:

478.00

Your Price:

1.35

Each

Qty:

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:

129.00

Your Price:

1.52

Each

Qty:

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:

784.00

Your Price:

1.61

Each

Qty:

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:

89.00

Your Price:

1.63

Each

Qty:

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:

152.00

Your Price:

1.71

Each

Qty:

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:

158.00

Your Price:

1.77

Each

Qty:

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:

562.00

Your Price:

1.80

Each

Qty:

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:

202.00

Your Price:

1.99

Each

Qty:

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:

274.00

Your Price:

2.00

Each

Qty:

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:

385.00

Your Price:

2.02

Each

Qty:

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:

619.00

Your Price:

2.04

Each

Qty:

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:

0.00

ETA:

03/06/2026

Your Price:

2.25

Each

Qty:

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:

179.00

Your Price:

2.43

Each

Qty:

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:

222.00

Your Price:

2.39

Each

Qty:

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:

688.00

Your Price:

2.52

Each

Qty:

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:

85.00

Your Price:

2.81

Each

Qty:

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:

229.00

Your Price:

3.07

Each

Qty:

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:

512.00

Your Price:

3.19

Each

Qty:

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:

267.00

Your Price:

3.32

Each

Qty:

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:

100.00

Your Price:

3.33

Each

Qty:

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:

202.00

Your Price:

3.51

Each

Qty:

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:

108.00

Your Price:

3.53

Each

Qty:

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:

247.00

Your Price:

3.78

Each

Qty:

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:

29.00

Your Price:

3.96

Each

Qty:

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:

21.00

Your Price:

3.97

Each

Qty:

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:

29.00

Your Price:

4.12

Each

Qty:

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:

88.00

Your Price:

4.59

Each

Qty:

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:

9.00

Your Price:

4.85

Each

Qty:

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:

0.00

ETA:

04/10/2026

Your Price:

4.98

Each

Qty:

Item#:

8-357 N90

ID-5.5 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

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

ID-5.5 CS-3/16
SPEC SHEET

Available:

8.00

Your Price:

5.30

Each

Qty:

Item#:

8-358 N90

ID-5.625 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

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

ID-5.625 CS-3/16
SPEC SHEET

Available:

148.00

Your Price:

5.55

Each

Qty:

Item#:

8-359 N90

ID-5.75 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

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

ID-5.75 CS-3/16
SPEC SHEET

Available:

140.00

Your Price:

5.58

Each

Qty:

Item#:

8-360 N90

ID-5.875 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

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

ID-5.875 CS-3/16
SPEC SHEET

Available:

47.00

Your Price:

5.75

Each

Qty:

Item#:

8-361 N90

ID-6 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

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

ID-6 CS-3/16
SPEC SHEET

Available:

42.00

Your Price:

5.81

Each

Qty:

Item#:

8-362 N90

ID-6.25 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

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

ID-6.25 CS-3/16
SPEC SHEET

Available:

14.00

Your Price:

6.64

Each

Qty:

|◀ ◀ 397 - 432 of 1638 ▶ ▶|

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

ID-5.5 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

ID-5.625 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

ID-5.75 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

ID-5.875 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

ID-6 Nominal CS-3/16" 90D NBR Contoured Back Up Inch

ID-6.25 Nominal CS-3/16" 90D NBR Contoured Back Up Inch