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#:
MBT-38X44X1.25

ID-38 OD-44 HT-1.25 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-38 OD-44 HT-1.25
SPEC SHEET

Available:
38.00
Your Price:
3.51
Each
Item#:
MBT-39X45X1.25

39 x 45 x 1.25 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-39 OD-45 HT-1.25
SPEC SHEET

Available:
19.00
Your Price:
3.51
Each
Item#:
MBT-40X45X1.25

40 x 45 x 1.25 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-40 OD-45 HT-1.25
SPEC SHEET

Available:
121.00
Your Price:
2.90
Each
Item#:
MBT-40X50X1.9

40 x 50 x 1.9 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-40 OD-50 HT-1.9
SPEC SHEET

Available:
27.00
Your Price:
3.72
Each
Item#:
MBT-41X46X1.5

ID-41 OD-46 HT-1.5 Virgin PTFE Solid Back Up Metric

Available:
4.00
Your Price:
17.34
Each
Item#:
MBT-41X47X1.25

ID-41 OD-47 HT-1.25 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-41 OD-47 HT-1.25
SPEC SHEET

Available:
37.00
Your Price:
3.75
Each
Item#:
MBT-42X48X1.25

ID-42 OD-48 HT-1.25 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-42 OD-48 HT-1.25
SPEC SHEET

Available:
42.00
Your Price:
3.75
Each
Item#:
MBT-44X50X1.25

ID-44 OD-50 HT-1.25 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-44 OD-50 HT-1.25
SPEC SHEET

Available:
37.00
Your Price:
4.22
Each
Item#:
MBT-45X50X1.25

ID-45 OD-50 HT-1.25 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-45 OD-50 HT-1.25
SPEC SHEET

Available:
145.00
Your Price:
3.06
Each
Item#:
MBT-45X50X1.5-S

ID-45 OD-50 HT-1.5 Virgin PTFE Split Back Up Metric

Available:
12.00
Your Price:
7.99
Each
Item#:
MBT-45X51X1.25

ID-45 OD-51 HT-1.25 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-ID-45 OD-51 HT-1.25
SPEC SHEET

Available:
23.00
Your Price:
4.26
Each
Item#:
MBT-45X55X1.25

ID-45 OD-55 HT-1.25 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-45 OD-55 HT-1.25
SPEC SHEET

Available:
0.00
Contact us to order
Item#:
MBT-45X55X1.9

ID-45 OD-55 HT-1.9 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-45 OD-55 HT-1.9
SPEC SHEET

Available:
36.00
Your Price:
6.57
Each
Item#:
MBT-46X52X1.25

ID-46 OD-52 HT-1.25 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-46 OD-52 HT-1.25
SPEC SHEET

Available:
0.00
Contact us to order
Item#:
MBT-48X54X1.25

ID-48 OD-54 HT-1.25 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-48 OD-54 HT-1.25
SPEC SHEET

Available:
20.00
Your Price:
4.32
Each
Item#:
MBT-48X58X1.9

ID-48 OD-58 HT-1.9 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-48 OD-58 HT-1.9
SPEC SHEET

Available:
34.00
Your Price:
6.59
Each
Item#:
MBT-49X55X1.25

ID-49 OD-55 HT-1.25 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-49 OD-55 HT-1.25
SPEC SHEET

Available:
0.00
Contact us to order
Item#:
MBT-50X55X1.25

ID-50 OD-55 HT-1.25 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-50 OD-55 HT-1.25
SPEC SHEET

Available:
77.00
Your Price:
3.06
Each
Item#:
MBT-50X56X1.25

ID-50 OD-56 HT-1.25 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-50 OD-56 HT-1.25
SPEC SHEET

Available:
64.00
Your Price:
4.35
Each
Item#:
MBT-50X60X1.9

ID-50 OD-60 HT-1.9 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-50 OD-60 HT-1.9
SPEC SHEET

Available:
0.00
ETA:
05/01/2026
Your Price:
6.63
Each
Item#:
MBT-52X62X1.9

ID-52 OD-62 HT-1.9 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-52 OD-62 HT-1.9
SPEC SHEET

Available:
0.00
Contact us to order
Item#:
MBT-53X63X1.9

ID-53 OD-63 HT-1.9 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-53 OD-63 HT-1.9
SPEC SHEET

Available:
13.00
Your Price:
6.73
Each
Item#:
MBT-55X60X1.25

55 x 60 x 1.25 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-55 OD-60 HT-1.25
SPEC SHEET

Available:
44.00
Your Price:
3.06
Each
Item#:
MBT-55X65X1.9

ID-55 OD-65 HT-1.9 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-55 OD-65 HT-1.9
SPEC SHEET

Available:
55.00
Your Price:
6.79
Each
Item#:
MBT-56X66X1.9

ID-56 OD-66 HT-1.9 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-56 OD-66 HT-1.9
SPEC SHEET

Available:
29.00
Your Price:
7.21
Each
Item#:
MBT-58X68X1.9

ID-58 OD-68 HT-1.9 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-58 OD-68 HT-1.9
SPEC SHEET

Available:
24.00
Your Price:
7.32
Each
Item#:
MBT-60X65X1.25

ID-60 OD-65 HT-1.25 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-60 OD-65 HT-1.25
SPEC SHEET

Available:
61.00
Your Price:
3.06
Each
Item#:
MBT-60X70X1.9

ID-60 OD-70 HT-1.9 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-60 OD-70 HT-1.9
SPEC SHEET

Available:
43.00
Your Price:
7.38
Each
Item#:
MBT-62X67X1.25

62 x 67 x 1.25 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-62 OD-67 HT-1.25
SPEC SHEET

Available:
40.00
Your Price:
7.41
Each
Item#:
MBT-62X72X1.9

ID-62 OD-72 HT-1.9 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-62 OD-72 HT-1.9
SPEC SHEET

Available:
5.00
Your Price:
7.45
Each
Item#:
MBT-63X73X1.9

ID-63 OD-73 HT-1.9 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-63 OD-73 HT-1.9
SPEC SHEET

Available:
0.00
Contact us to order
Item#:
MBT-65X70X1.25

ID-75 OD-70 HT-1.25 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-75 OD-70 HT-1.25
SPEC SHEET

Available:
105.00
Your Price:
3.06
Each
Item#:
MBT-65X75X1.9

ID-65 OD-75 HT-1.9 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-65 OD-75 HT-1.9
SPEC SHEET

Available:
17.00
Your Price:
7.85
Each
Item#:
MBT-67X77X1.9

ID-67 OD-77 HT-1.9 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-67 OD-77 HT-1.9
SPEC SHEET

Available:
0.00
Contact us to order
Item#:
MBT-70X75X1.25

70 x 75 x 1.25 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-70 OD-75 HT-1.25
SPEC SHEET

Available:
100.00
Your Price:
3.06
Each
Item#:
MBT-70X80X1.9

ID-70 OD-80 HT-1.9 Virgin PTFE Solid Back Up Metric

Hydraulic SealAlternative Seals: MBH, MBN

ID-70 OD-80 HT-1.9
SPEC SHEET

Available:
23.00
Your Price:
8.70
Each
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