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

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Item#:
50004500-MB

4.5 x 5.5 x 0.5 65D Polyurethane Modular Back Up Inch

Hydraulic Seal

ID-4.5 OD-5.5 HT-0.5
SPEC SHEET

Available:
1.00
Your Price:
77.31
Each
Item#:
50005000-MB

5 x 6 x 0.5 65D Polyurethane Modular Back Up Inch

Hydraulic Seal

ID-5 OD-6 HT-0.5
SPEC SHEET

Available:
14.00
Your Price:
85.03
Each
Item#:
50005500-MB

5.5 x 6.5 x 0.5 65D Polyurethane Modular Back Up Inch

Hydraulic Seal

ID-5.5 OD-6.5 HT-0.5
SPEC SHEET

Available:
5.00
Your Price:
92.35
Each
Item#:
50006000-MB

6 x 7 x 0.5 65D Polyurethane Modular Back Up Inch

Hydraulic Seal

ID-6 OD-7 HT-0.5
SPEC SHEET

Available:
19.00
Your Price:
109.23
Each
Item#:
50007000-MB

7 x 8 x 0.5 65D Polyurethane Modular Back Up Inch

Hydraulic Seal

ID-7 OD-8 HT-0.5
SPEC SHEET

Available:
6.00
Your Price:
114.48
Each
Item#:
50008000-MB 4652

8 x 9 x 0.5 65D FluoroMyte Modular Back Up Inch

Hydraulic Seal

ID-8 OD-9 HT-0.5
SPEC SHEET

Available:
10.00
Your Price:
139.18
Each
Item#:
50008500-MB

8.5 x 9.5 x 0.5 65D Polyurethane Modular Back Up Inch

Hydraulic Seal

ID-8.5 OD-9.5 HT-0.5
SPEC SHEET

Available:
7.00
Your Price:
127.32
Each
Item#:
50009000-MB

9 x 10 x 0.5 65D Polyurethane Modular Back Up Inch

Hydraulic Seal

ID-9 OD-10 HT-0.5
SPEC SHEET

Available:
9.00
Your Price:
129.93
Each
Item#:
50009500-MB

9.5 x 10.5 x 0.5 65D Polyurethane Modular Back Up Inch

Hydraulic Seal

ID-9.5 OD-10.5 HT-0.5
SPEC SHEET

Available:
7.00
Your Price:
180.99
Each
Item#:
50010000-MB

10 x 11 x 0.5 65D Polyurethane Modular Back Up Inch

Hydraulic Seal

ID-10 OD-11 HT-0.5
SPEC SHEET

Available:
4.00
Your Price:
144.22
Each
Item#:
50010000-MB 4652

10 x 11 x .5 FluoroMyte Modular Back Up

Hydraulic Seal

ID-10 OD-11 HT-0.5
SPEC SHEET

Available:
0.00
Contact us to order
Item#:
50010500-MB 4652

10.5 x 11.5 x 0.5 65D Polymite® Modular Back Up Inch

Hydraulic Seal

ID-10.5 OD-11.5 HT-0.5
SPEC SHEET

Available:
6.00
Your Price:
185.36
Each
Item#:
50012000-MB

12 x 13 x 0.5 65D Polyurethane Modular Back Up Inch

Hydraulic Seal

ID-12 OD-13 HT-0.5
SPEC SHEET

Available:
4.00
Your Price:
172.28
Each
Item#:
50013500-MB

13.5 x 14.5 x 0.5 65D Polyurethane Modular Back Up Inch

Hydraulic Seal

ID-13.5 OD-14.5 HT-0.5
SPEC SHEET

Available:
10.00
Your Price:
224.01
Each
Item#:
50019000-MB

19 x 20 x 0.5 65D Polyurethane Modular Back Up Inch

Hydraulic Seal

ID-19 OD-20 HT-0.5
SPEC SHEET

Available:
1.00
Your Price:
337.86
Each
Item#:
51-129 4651

ID-1.562 Nominal CS-3/32" 95A Urethane Flat Back Up Inch

*Qty Ltd*
Hydraulic Seal

ID-1.562 Nominal CS-3/32

Available:
11.00
Your Price:
1.45
Each
Item#:
51-218 4651

ID-1.25 Nominal CS-1/8" 95A Urethane Flat Back Up Inch

*Qty Ltd*
Hydraulic Seal

ID-1.25 Nominal CS-1/8

Available:
1.00
Your Price:
1.25
Each
Item#:
51-220 4651

ID-1.375 Nominal CS-1/8" 95A Urethane Flat Back Up Inch

*Qty Ltd*
Hydraulic Seal

ID-1.375 Nominal CS-1/8

Available:
12.00
Your Price:
1.28
Each
Item#:
51-232 4651

ID-2.75 Nominal CS-1/8" 95A Urethane Flat Back Up Inch

*Qty Ltd*
Hydraulic Seal

ID-2.75 Nominal CS-1/8

Available:
101.00
Your Price:
1.62
Each
Item#:
51-234 4651

ID-3 Nominal CS-1/8" 95A Urethane Flat Back Up Inch

*Qty Ltd*
Hydraulic Seal

ID-3 Nominal CS-1/8

Available:
41.00
Your Price:
1.79
Each
Item#:
51-244 4651

ID-4.25 Nominal CS-1/8"  95A Urethane Flat Back Up Inch *Qty Ltd*

Hydraulic Seal

ID4.25 OD-4.50 HT-N/A

Available:
33.00
Your Price:
3.15
Each
Item#:
51-252 4651

ID-5.25 Nominal CS-1/8" 95A Urethane Flat Back Up Inch *Qty Ltd*

Hydraulic Seal

ID-5.25 OD-5.50 HT-N/A

Available:
16.00
Your Price:
4.68
Each
Item#:
51-316 4651

ID-0.875 Nominal CS-3/16" 95A Urethane Flat Back Up Inch

*Qty Ltd*
Hydraulic Seal

ID-0.875 Nominal CS-3/16

Available:
20.00
Your Price:
1.25
Each
Item#:
51-336 4651

ID-2.875 Nominal CS-3/16" 95A Urethane Flat Back Up Inch

*Qty Ltd*
Hydraulic Seal

ID-2.875 Nominal CS-3/16

Available:
872.00
Your Price:
1.96
Each
Item#:
62512750-MB

12.75 x 14 x 0.625 65D Polyurethane Modular Back Up Inch

Hydraulic Seal

ID-12.75 OD-14 HT-0.625
SPEC SHEET

Available:
1.00
Your Price:
273.38
Each
Item#:
8-004 N90

ID-0.078 Nominal CS-1/16" 90D NBR Contoured Back Up Inch

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

ID-0.078 CS-1/16
SPEC SHEET

Available:
124.00
Your Price:
0.56
Each
Item#:
8-005 N90

ID-0.093 Nominal CS-1/16" 90D NBR Contoured Back Up Inch

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

ID-0.093 CS-1/16
SPEC SHEET

Available:
259.00
Your Price:
0.57
Each
Item#:
8-006 N90

ID-0.125 Nominal CS-1/16" 90D NBR Contoured Back Up Inch

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

ID-0.125 CS-1/16
SPEC SHEET

Available:
309.00
Your Price:
0.45
Each
Item#:
8-007 N90

ID-0.156 Nominal CS-1/16" 90D NBR Contoured Back Up Inch

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

ID-0.156 CS-1/16
SPEC SHEET

Available:
802.00
Your Price:
0.45
Each
Item#:
8-008 N90

ID-0.187 Nominal CS-1/16" 90D NBR Contoured Back Up Inch

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

ID-0.187 CS-1/16
SPEC SHEET

Available:
332.00
Your Price:
0.45
Each
Item#:
8-009 N90

ID-0.218 Nominal CS-1/16" 90D NBR Contoured Back Up Inch

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

ID-0.218 CS-1/16
SPEC SHEET

Available:
480.00
Your Price:
0.45
Each
Item#:
8-010 N90

ID-0.25 Nominal CS-1/16" 90D NBR Contoured Back Up Inch

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

ID-0.25 CS-1/16
SPEC SHEET

Available:
827.00
Your Price:
0.45
Each
Item#:
8-011 N90

ID-0.312 Nominal CS-1/16" 90D NBR Contoured Back Up Inch

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

ID-0.312 CS-1/16
SPEC SHEET

Available:
235.00
Your Price:
0.45
Each
Item#:
8-012 N90

ID-0.375 Nominal CS-1/16" 90D NBR Contoured Back Up Inch

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

ID-0.375 CS-1/16
SPEC SHEET

Available:
885.00
Your Price:
0.49
Each
Item#:
8-013 N90

ID-0.437 Nominal CS-1/16" 90D NBR Contoured Back Up Inch

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

ID-0.437 CS-1/16
SPEC SHEET

Available:
182.00
Your Price:
0.50
Each
Item#:
8-014 N90

ID-0.5 Nominal CS-1/16" 90D NBR Contoured Back Up Inch

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

ID-0.5 CS-1/16
SPEC SHEET

Available:
704.00
Your Price:
0.50
Each
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