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#:
8708-0450

4.5 x 5 x 0.062 55 Shore D Hytrel® U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: BU-T, BU-N

ID-4.5 OD-5 HT-0.062
SPEC SHEET

Manufacturer:
C
Available:
44.00
Your Price:
7.05
Each
Item#:
8709-0443

4.437 x 5 x 0.062 55 Shore D Hytrel® U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: BU-T, BU-N

ID-4.437 OD-5 HT-0.062
SPEC SHEET

Available:
37.00
Your Price:
21.06
Each
Item#:
8709-0446

4.468 x 5.031 x 0.062 55 Shore D Hytrel® U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: BU-T, BU-N

ID-4.468 OD-5.031 HT-0.062
SPEC SHEET

Available:
51.00
Your Price:
10.32
Each
Item#:
8709-0500

5 x 5.562 x 0.062 55 Shore D Hytrel® U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: BU-T, BU-N

ID-5 OD-5.562 HT-0.062
SPEC SHEET

Available:
0.00
Your Price:
22.85
Each
Item#:
8709-0543

5.437 x 6 x 0.062 55 Shore D Hytrel® U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: BU-T, BU-N

ID-5.437 OD-6 HT-0.062
SPEC SHEET

Manufacturer:
C
Available:
54.00
Your Price:
10.18
Each
Item#:
8710-0537

5.375 x 6 x 0.062 55 Shore D Hytrel® U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: BU-T, BU-N

ID-5.375 OD-6 HT-0.062
SPEC SHEET

Manufacturer:
C
Available:
18.00
Your Price:
8.27
Each
Item#:
8710-0540

5.406 x 6.031 x 0.062 55 Shore D Hytrel® U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: BU-T, BU-N

ID-5.406 OD-6.031 HT-0.062
SPEC SHEET

Available:
50.00
Your Price:
8.40
Each
Item#:
8710-0550

5.5 x 6.125 x 0.062 55 Shore D Hytrel® U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: BU-T, BU-N

ID-5.5 OD-6.125 HT-0.062
SPEC SHEET

Available:
253.00
Your Price:
12.83
Each
Item#:
8710-0637

6.375 x 7 x 0.062 55 Shore D Hytrel® U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: BU-T, BU-N

ID-6.375 OD-7 HT-0.062
SPEC SHEET

Available:
36.00
Your Price:
35.43
Each
Item#:
8710-0640

6.406 x 7.031 x 0.062 55 Shore D Hytrel® U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: BU-T, BU-N

ID-6.406 OD-7.031 HT-0.062
SPEC SHEET

Available:
0.00
Contact us to order
Item#:
8710-0700

7 x 7.625 x 0.062 55 Shore D Hytrel® U-Cup Back Up Ring Inch

* SEE BU-7000-7625-062-T
Hydraulic SealAlternative Seals: BU-T, BU-N

ID-7 OD-7.625 HT-0.062
SPEC SHEET

Available:
0.00
Contact us to order
Item#:
8710-0737

7.375 x 8 x 0.062 55 Shore D Hytrel® U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: BU-T, BU-N

ID-7.375 OD-8 HT-0.062
SPEC SHEET

Manufacturer:
C
Available:
14.00
Your Price:
41.16
Each
Item#:
8710-0740

7.406 x 8.031 x 0.062 55 Shore D Hytrel® U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: BU-T, BU-N

ID-7.406 OD-8.031 HT-0.062
SPEC SHEET

Available:
0.00
Contact us to order
Item#:
8711-0931

9.312 x 10 x 0.062 55 Shore D Hytrel® U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: BU-T, BU-N

ID-9.312 OD-10 HT-0.062
SPEC SHEET

Manufacturer:
C
Available:
20.00
Your Price:
59.58
Each
Item#:
8712-1125

11.25 x 12 x 0.062 55 Shore D Hytrel® U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: BU-T, BU-N

ID-11.25 OD-12 HT-0.062
SPEC SHEET

Available:
21.00
Your Price:
58.71
Each
Item#:
8713-1318

13.187 x 14 x 0.062 55 Shore D Hytrel® U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: BU-T, BU-N

ID-13.187 OD-14 HT-0.062
SPEC SHEET

Available:
28.00
Your Price:
69.18
Each
Item#:
8716-1100

11 x 12 x 0.062 55 Shore D Hytrel® U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: BU-T, BU-N

ID-11 OD-12 HT-0.062
SPEC SHEET

Available:
26.00
Your Price:
77.27
Each
Item#:
8716-1103

11.031 x 12.031 x 0.062 55 Shore D Hytrel® U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: BU-T, BU-N

ID-11.031 OD-12.031 HT-0.062
SPEC SHEET

Available:
0.00
Contact us to order
Item#:
BU-0395-0554-050-T

0.395 x .554 x .05 Solid PTFE U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: 8700, BU-N, BU-H

ID-0.395 OD-0.554 HT-0.05
SPEC SHEET

Available:
2704.00
Your Price:
4.86
Each
Item#:
BU-0500-1000-062-T

0.5 x 1 x 0.062 Solid PTFE U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: 8700, BU-N, BU-H

ID-0.5 OD-1 HT-0.062
SPEC SHEET

Available:
80.00
Your Price:
11.13
Each
Item#:
BU-0625-0875-062-T

0.625 x 0.875 x 0.062 Solid PTFE U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: 8700, BU-N, BU-H

ID-0.625 OD-0.875 HT-0.062
SPEC SHEET

Available:
8.00
Your Price:
9.60
Each
Item#:
BU-0750-1000-031-T

0.75 x 1 x 0.031 Solid PTFE U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: 8700, BU-N, BU-H

ID-0.75 OD-1 HT-0.031
SPEC SHEET

Available:
16.00
Your Price:
13.31
Each
Item#:
BU-0750-1000-062-T

0.75 x 1 x 0.062 Solid PTFE U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: 8700, BU-N, BU-H

ID-0.75 OD-1 HT-0.062
SPEC SHEET

Available:
34.00
Your Price:
14.03
Each
Item#:
BU-0750-1125-125-VEG

0.75 x 1.125 x 0.125 Vegetable Fiber Back Up Inch

Available:
11.00
Your Price:
4.03
Each
Item#:
BU-0875-1120-060-1@1

0.875 x 1.125 x 0.06 Solid PTFE U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: 8700, BU-N, BU-H

ID-0.875 OD-1.125 HT-0.06
SPEC SHEET

Available:
31.00
Your Price:
13.18
Each
Item#:
BU-0875-1125-020-T

0.875 x 1.125 x 0.02 Solid PTFE U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: 8700, BU-N, BU-H

ID-0.875 OD-1.125 HT-0.02
SPEC SHEET

Available:
2.00
Your Price:
11.16
Each
Item#:
BU-0875-1250-187-N1

0.875 x 1.25 x 0.187 Solid Nylon Backup Ring for U-Cups

Hydraulic SealAlternative Seals: BU-T, BU-H, 8700

ID-0.875 OD-1.25 HT-0.187
SPEC SHEET

Available:
137.00
Your Price:
8.25
Each
Item#:
BU-1000-1250-060-T

1 x 1.25 x 0.06 Solid PTFE U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: 8700, BU-N, BU-H

ID-1 OD-1.25 HT-0.06
SPEC SHEET

Available:
28.00
Your Price:
9.38
Each
Item#:
BU-1000-1312-062-T

1 x 1.312 x 0.062 Solid PTFE U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: 8700, BU-N, BU-H

ID-1 OD-1.312 HT-0.062
SPEC SHEET

Available:
26.00
Your Price:
8.11
Each
Item#:
BU-11000-12000-062-T

11 x 12 x 0.062 Solid PTFE U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: 8700, BU-N, BU-H

ID-11 OD-12 HT-0.062
SPEC SHEET

Available:
9.00
Your Price:
65.72
Each
Item#:
BU-11250-12000-062-T

11.25 x 12 x 0.062 Solid PTFE U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: 8700, BU-N, BU-H

ID-11.25 OD-12 HT-0.062
SPEC SHEET

Available:
8.00
Your Price:
51.99
Each
Item#:
BU-1125-1375-031-VEG

1.125 x 1.375 x 0.031 Vegetable Fiber Back Up Inch

Hydraulic Seal

ID-1.125 OD-1.375 HT-0.031
SPEC SHEET

Available:
30.00
Your Price:
4.23
Each
Item#:
BU-1187-1500-062-T

1.187 x 1.5 x 0.062 Solid PTFE U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: 8700, BU-N, BU-H

ID-1.187 OD-1.5 HT-0.062
SPEC SHEET

Available:
11.00
Your Price:
8.15
Each
Item#:
BU-1187-1687-062-H

1.187 x 1.687 x .062 55 Shore D Hytrel® U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: BU-T, BU-N

ID-1.187 OD-1.687 HT- .062 

Available:
37.00
Your Price:
5.21
Each
Item#:
BU-1250-1375-015-VEG

1.25 x 1.375 x 0.015 Vegetable Fiber Back Up Inch

Hydraulic Seal

ID-1.25 OD-1.375 HT-0.015
SPEC SHEET

Available:
74.00
Your Price:
4.70
Each
Item#:
BU-1250-1500-031-VEG

1.25 x 1.5 x .031 Vegetable Fiber Back Up Inch

Hydraulic Seal

ID-1.25 OD-1.5 HT-0.031
SPEC SHEET

Available:
75.00
Your Price:
5.08
Each
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