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#:
MS27595-131

1.687 x 1.863 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-1.687 OD-1.863 HT-0.05
SPEC SHEET

Available:
39.00
Your Price:
2.61
Each
Item#:
MS27595-132

1.75 x 1.926 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-1.75 OD-1.926 HT-0.05
SPEC SHEET

Available:
79.00
Your Price:
3.86
Each
Item#:
MS27595-133

1.812 x 1.988 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-1.812 OD-1.988 HT-0.05
SPEC SHEET

Available:
88.00
Your Price:
2.07
Each
Item#:
MS27595-134

1.875 x 2.051 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-1.875 OD-2.051 HT-0.05
SPEC SHEET

Available:
99.00
Your Price:
4.57
Each
Item#:
MS27595-135

1.942 x 2.118 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-1.942 OD-2.118 HT-0.05
SPEC SHEET

Available:
95.00
Your Price:
4.63
Each
Item#:
MS27595-136

2 x 2.176 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-2 OD-2.176 HT-0.05
SPEC SHEET

Available:
57.00
Your Price:
4.74
Each
Item#:
MS27595-137

2.062 x 2.238 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-2.062 OD-2.238 HT-0.05
SPEC SHEET

Available:
54.00
Your Price:
4.87
Each
Item#:
MS27595-138

2.125 x 2.301 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-2.125 OD-2.301 HT-0.05
SPEC SHEET

Available:
60.00
Your Price:
4.98
Each
Item#:
MS27595-139

2.187 x 2.363 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-2.187 OD-2.363 HT-0.05
SPEC SHEET

Available:
48.00
Your Price:
7.32
Each
Item#:
MS27595-140

2.25 x 2.426 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-2.25 OD-2.426 HT-0.05
SPEC SHEET

Available:
45.00
Your Price:
7.63
Each
Item#:
MS27595-141

2.312 x 2.488 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-2.312 OD-2.488 HT-0.05
SPEC SHEET

Available:
44.00
Your Price:
7.94
Each
Item#:
MS27595-142

2.375 x 2.551 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-2.375 OD-2.551 HT-0.05
SPEC SHEET

Available:
1296.00
Your Price:
8.04
Each
Item#:
MS27595-143

2.437 x 2.613 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-2.437 OD-2.613 HT-0.05
SPEC SHEET

Available:
21.00
Your Price:
8.25
Each
Item#:
MS27595-144

2.5 x 2.676 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-2.5 OD-2.676 HT-0.05
SPEC SHEET

Available:
38.00
Your Price:
8.46
Each
Item#:
MS27595-145

2.562 x 2.738 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-2.562 OD-2.738 HT-0.05
SPEC SHEET

Available:
52.00
Your Price:
9.02
Each
Item#:
MS27595-146

2.629 x 2.805 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-2.629 OD-2.805 HT-0.05
SPEC SHEET

Available:
1.00
Your Price:
9.12
Each
Item#:
MS27595-147

2.87 x 3.046 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-2.87 OD-3.046 HT-0.05
SPEC SHEET

Available:
0.00
ETA:
02/17/2026
Your Price:
9.97
Each
Item#:
MS27595-148

2.75 x 2.926 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-2.75 OD-2.926 HT-0.05
SPEC SHEET

Available:
87.00
Your Price:
9.98
Each
Item#:
MS27595-149

2.817 x 2.993 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-2.817 OD-2.993 HT-0.05
SPEC SHEET

Available:
3.00
Your Price:
10.17
Each
Item#:
MS27595-150

2.875 x 3.051 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-2.875 OD-3.051 HT-0.05
SPEC SHEET

Available:
51.00
Your Price:
11.65
Each
Item#:
MS27595-151

3 x 3.176 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-3 OD-3.176 HT-0.05
SPEC SHEET

Available:
77.00
Your Price:
12.06
Each
Item#:
MS27595-152

3.25 x 3.426 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-3.25 OD-3.426 HT-0.05
SPEC SHEET

Available:
67.00
Your Price:
11.65
Each
Item#:
MS27595-154

3.75 x 3.926 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-3.75 OD-3.926 HT-0.05
SPEC SHEET

Available:
8.00
Your Price:
13.35
Each
Item#:
MS27595-156

4.25 x 4.437 x .05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-4.25 OD-4.437 HT-0.05
SPEC SHEET

Available:
33.00
Your Price:
17.16
Each
Item#:
MS27595-157

4.5 x 4.676 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-4.5 OD-4.676 HT-0.05
SPEC SHEET

Available:
20.00
Your Price:
18.58
Each
Item#:
MS27595-158

4.75 x 4.937 x .05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-4.75 OD-4.937 HT-0.05
SPEC SHEET

Available:
50.00
Your Price:
18.79
Each
Item#:
MS27595-166

6.75 x 6.926 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-6.75 OD-6.926 HT-0.05
SPEC SHEET

Available:
14.00
Your Price:
23.62
Each
Item#:
MS27595-210

0.75 x 0.988 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-0.75 OD-0.988 HT-0.05
SPEC SHEET

Available:
170.00
Your Price:
2.27
Each
Item#:
MS27595-211

0.812 x 1.05 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-0.812 OD-1.05 HT-0.05
SPEC SHEET

Available:
171.00
Your Price:
2.56
Each
Item#:
MS27595-212

0.875 x 1.113 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-0.875 OD-1.113 HT-0.05
SPEC SHEET

Available:
186.00
Your Price:
2.69
Each
Item#:
MS27595-213

0.937 x 1.175 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-0.937 OD-1.175 HT-0.05
SPEC SHEET

Available:
189.00
Your Price:
2.70
Each
Item#:
MS27595-214

1 x 1.238 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-1 OD-1.238 HT-0.05
SPEC SHEET

Available:
192.00
Your Price:
2.31
Each
Item#:
MS27595-215

1.602 x 1.84 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-1.602 OD-1.84 HT-0.05
SPEC SHEET

Available:
77.00
Your Price:
3.05
Each
Item#:
MS27595-216

1.125 x 1.363 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-1.125 OD-1.363 HT-0.05
SPEC SHEET

Available:
194.00
Your Price:
3.27
Each
Item#:
MS27595-217

1.187 x 1.425 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-1.187 OD-1.425 HT-0.05
SPEC SHEET

Available:
73.00
Your Price:
3.50
Each
Item#:
MS27595-218

1.25 x 1.488 x 0.05 Solid PTFE Back Up Ring Inch

Hydraulic SealAlternative Seals: 8-, 19-, 51-, MS28774, MS28782, MS28783

ID-1.25 OD-1.488 HT-0.05
SPEC SHEET

Available:
161.00
Your Price:
3.23
Each
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