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#:
BU-1250-1750-062-T

1.25 x 1.75 x .062 Solid PTFE U-Cup Back Up Ring Inch

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

ID-1.25 OD-1.75 HT-0.062
SPEC SHEET

Available:
12.00
Your Price:
17.01
Each
Item#:
BU-13000-14000-062-T

13 x 14 x 0.062 Solid PTFE U-Cup Back Up Ring - Inch

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

ID-13 OD-14 HT-0.062
SPEC SHEET

Available:
7.00
Your Price:
70.50
Each
Item#:
BU-13187-14000-062-T

13.187 x 14 x 0.062 Solid PTFE U-Cup Back Up Ring - Inch

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

ID-13.187 OD-14 HT-0.062
SPEC SHEET

Available:
4.00
Your Price:
87.24
Each
Item#:
BU-1375-1625-093-T

1.375 x 1.625 x 0.093 Solid PTFE U-Cup Back Up Ring Inch

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

ID-1.375 OD-1.625 HT-0.093
SPEC SHEET

Available:
72.00
Your Price:
16.06
Each
Item#:
BU-1375-1687-062-T

1.375 x 1.687 x 0.062 Solid PTFE U-Cup Back Up Ring Inch

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

ID-1.375 OD-1.687 HT-0.062
SPEC SHEET

Available:
23.00
Your Price:
15.83
Each
Item#:
BU-1375-1750-062-T

1.375 x 1.75 x 0.062 Solid PTFE U-Cup Back Up Ring Inch

(SK004016)
Hydraulic SealAlternative Seals: 8700, BU-N, BU-H

ID-1.375 OD-1.75 HT-0.062
SPEC SHEET

Available:
6.00
Your Price:
16.95
Each
Item#:
BU-1500-1687-031-VEG

1.5 x 1.687 x .031 Vegetable Fiber Back Up Inch

Hydraulic Seal

ID-1.5 OD-1.687 HT-0.031
SPEC SHEET

Available:
20.00
Your Price:
5.22
Each
Item#:
BU-1500-1750-031-VEG

1.5 x 1.75 x .031 Vegetable Fiber Back Up Inch

Hydraulic Seal

ID-1.5 OD-1.75 HT-0.031
SPEC SHEET

Available:
35.00
Your Price:
5.27
Each
Item#:
BU-1500-1875-062-T

1.5 x 1.875 x 0.062 Solid PTFE U-Cup Back Up Ring Inch

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

ID-1.5 OD-1.875 HT-0.062
SPEC SHEET

Available:
12.00
Your Price:
19.40
Each
Item#:
BU-1625-2000-062-T

1.625 x 2 x 0.062 Solid PTFE U-Cup Back Up Ring Inch

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

ID-1.625 OD-2 HT-0.062
SPEC SHEET

Available:
15.00
Your Price:
15.44
Each
Item#:
BU-1750-2125-062-T

1.75 x 2.125 x 0.062 Solid PTFE U-Cup Back Up Ring Inch

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

ID-1.75 OD-2.125 HT-0.062
SPEC SHEET

Available:
25.00
Your Price:
15.48
Each
Item#:
BU-1875-2250-092-T

1.875 x 2.25 x 0.092 Solid PTFE U-Cup Back Up Ring Inch

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

ID-1.875 OD-2.25 HT-0.092
SPEC SHEET

Available:
33.00
Your Price:
19.02
Each
Item#:
BU-2000-2187-031-VEG

2 x 2.187 x .031 Vegetable Fiber Back Up Inch

Hydraulic Seal

ID-2 OD-2.187 HT-0.031
SPEC SHEET

Available:
16.00
Your Price:
7.07
Each
Item#:
BU-2000-2250-031-VEG

2 x 2.25 x .031 Vegetable Fiber Back Up Inch

Hydraulic Seal

ID-2 OD-2.25 HT-0.031
SPEC SHEET

Available:
67.00
Your Price:
7.48
Each
Item#:
BU-2000-2375-062-T

2 x 2.375 x 0.062 Solid PTFE U-Cup Back Up Ring Inch

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

ID-2 OD-2.375 HT-0.062
SPEC SHEET

Available:
27.00
Your Price:
16.28
Each
Item#:
BU-2000-2500-062-VEG

2 x 2.5 x 0.062 Vegetable Fiber Back Up Inch

Available:
5.00
Your Price:
7.54
Each
Item#:
BU-2000-2625-062-VEG

2 x 2.625 x 0.062 Vegetable Fiber Back Up Inch

Available:
133.00
Your Price:
7.99
Each
Item#:
BU-2000-2750-032-VEG

2 x 2.75 x .031 Vegetable Fiber Back Up Inch

Hydraulic Seal

ID-75 OD-100 HT-13
SPEC SHEET

Available:
8.00
Your Price:
7.54
Each
Item#:
BU-2062-2562-093-H

2.062 x 2.562 x .093 55 Shore D Hytrel® U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: BU-T, BU-N

ID-2.062 OD-2.562 HT- .093 

Available:
14.00
Your Price:
8.91
Each
Item#:
BU-2125-2500-062-T

2.125 x 2.5 x 0.062 Solid PTFE U-Cup Back Up Ring Inch

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

ID-2.125 OD-2.5 HT-0.062
SPEC SHEET

Available:
37.00
Your Price:
16.45
Each
Item#:
BU-2250-2750-062-T

2.25 x 2.75 x .062 Solid PTFE U-Cup Back Up Ring Inch

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

ID-2.25 OD-2.75 HT-0.062
SPEC SHEET

Available:
3.00
Your Price:
19.42
Each
Item#:
BU-2250-2750-125-T

2.25 x 2.75 x .125 Solid PTFE U-Cup Back Up Ring Inch

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

ID-2.25 OD-2.75 HT-0.125
SPEC SHEET

Available:
2.00
Your Price:
34.66
Each
Item#:
BU-2499-2730-150-T

2.499 x 2.73 x 0.15 Solid PTFE U-Cup Back Up Ring Inch

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

ID-2.499 OD-2.73 HT-0.15
SPEC SHEET

Available:
16.00
Your Price:
19.53
Each
Item#:
BU-2500-2687-031-VEG

2.5 x 2.687 x .031 Vegetable Fiber Back Up Inch

Hydraulic Seal

ID-2.5 OD-2.687 HT-0.031
SPEC SHEET

Available:
27.00
Your Price:
7.10
Each
Item#:
BU-2500-2750-031-VEG

2.5 x 2.75 x .031 Vegetable Fiber Back Up Inch

Hydraulic Seal

ID-2.5 OD-2.75 HT-0.031
SPEC SHEET

Available:
46.00
Your Price:
7.91
Each
Item#:
BU-2500-2875-062-H

2.5 x 2.875 x .062 55 Shore D Hytrel® U-Cup Back Up Ring Inch

Hydraulic SealAlternative Seals: BU-T, BU-N

ID-2.5 OD-2.875 HT- .062 

Available:
62.00
Your Price:
3.63
Each
Item#:
BU-2500-2875-062-T

2.5 x 2.875 x 0.062 Solid PTFE U-Cup Back Up Ring Inch

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

ID-2.5 OD-2.875 HT-0.062
SPEC SHEET

Available:
7.00
Your Price:
33.51
Each
Item#:
BU-2500-2937-062-T

2.5 x 2.937 x 0.062 Solid PTFE U-Cup Back Up Ring Inch

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

ID-2.5 OD-2.937 HT-0.062
SPEC SHEET

Available:
10.00
Your Price:
17.79
Each
Item#:
BU-2500-3000-062-T

2.5 x 3 x .062 Solid PTFE U-Cup Back Up Ring Inch

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

ID-2.5 OD-3 HT-0.062
SPEC SHEET

Available:
4.00
Your Price:
18.43
Each
Item#:
BU-2500-3000-075-N@1

2.5 x 3 x 0.075 Split Nylon Backup Ring for U-Cups

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

ID-2.5 OD-3 HT-0.075
SPEC SHEET

Available:
47.00
Your Price:
7.14
Each
Item#:
BU-2562-3000-062-T

2.562 x 3 x .062 Solid PTFE U-Cup Back Up Ring Inch

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

ID-2.562 OD-3 HT-0.062
SPEC SHEET

Available:
15.00
Your Price:
20.01
Each
Item#:
BU-2750-3250-062-T

2.75 x 3.25 x .062 Solid PTFE U-Cup Back Up Ring Inch

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

ID-2.75 OD-3.25 HT-0.062
SPEC SHEET

Available:
4.00
Your Price:
21.90
Each
Item#:
BU-2750-3250-062-VEG

2.75 x 3.25 x 0.062 Vegetable Fiber Back Up Inch

Available:
1.00
Your Price:
8.47
Each
Item#:
BU-2750-3375-031-VEG

2.75 x 3.375 x 0.031 Vegetable Fiber Back Up Inch

Available:
400.00
Your Price:
7.62
Each
Item#:
BU-2750-3375-062-N1

2.75 x 3.375 x 0.062 Solid Nylon Backup Ring for U-Cups

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

ID-2.75 OD-3.375 HT-0.062
SPEC SHEET

Manufacturer:
C
Available:
144.00
Your Price:
5.98
Each
Item#:
BU-2750-3500-062-VEG

2.75 x 3.5 x 0.062 Vegetable Fiber Back Up Inch

Available:
6.00
Your Price:
8.90
Each
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