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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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19/51 - FLAT 95A URETHANE O-RING BACKUP - INCH (56)
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8 - CONTOURED N90 NITRILE O-RING BACKUP - INCH (347)
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8700 - HYTREL® U-CUP BACK UP - INCH (47)
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BU-N - NYLON U-CUP BACK UP - INCH (18)
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BU-T - PTFE U-CUP BACK UP - INCH (70)
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BU-VEG - VEGETABLE FIBER GASKET END CAP SEAL - INCH (37)
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MB - MODULAR URETHANE U-CUP BACK UP - INCH (113)
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MBH - HYTREL® U-CUP BACK UP - METRIC (144)
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MBN - NYLON U-CUP BACK UP - METRIC (65)
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MBT - SOLID TEFLON® U-CUP BACK UP - METRIC (135)
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MS27595 - SOLID TEFLON® O-RING BACK UP - INCH (241)
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MS28774 - SPLIT TEFLON® O-RING BACK UP - INCH (173)
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MS28782 - SPIRAL TEFLON® O-RING BACK UP - INCH (101)
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MS28783 - SPIRAL TEFLON® O-RING BACK UP - INCH (30)
Item#:
8-174 N90
ID-8.75 CS-3/32
SPEC SHEET
Available:
19.00
Your Price:
6.48
Each
Item#:
8-175 N90
ID-9 CS-3/32
SPEC SHEET
Available:
16.00
Your Price:
6.71
Each
Item#:
8-176 N90
ID-9.25 CS-3/32
SPEC SHEET
Available:
5.00
Your Price:
9.93
Each
Item#:
8-177 N90
ID-9.5 CS-3/32
SPEC SHEET
Available:
18.00
Your Price:
10.25
Each
Item#:
8-178 N90
ID-9.75 CS-3/32
SPEC SHEET
Available:
30.00
Your Price:
10.47
Each
Item#:
8-201 N90
ID-0.187 CS-1/8
SPEC SHEET
Available:
1467.00
Your Price:
0.48
Each
Item#:
8-202 N90
ID-0.25 CS-1/8
SPEC SHEET
Available:
0.00
ETA:
12/19/2025
Your Price:
0.48
Each
Item#:
8-203 N90
ID-0.312 CS-1/8
SPEC SHEET
Available:
255.00
Your Price:
0.48
Each
Item#:
8-204 N90
ID-0.375 CS-1/8
SPEC SHEET
Available:
290.00
Your Price:
0.48
Each
Item#:
8-205 N90
ID-0.437 CS-1/8
SPEC SHEET
Available:
109.00
Your Price:
0.48
Each
Item#:
8-206 N90
ID-0.5 CS-1/8
SPEC SHEET
Available:
269.00
Your Price:
0.48
Each
Item#:
8-207 N90
ID-0.562 CS-1/8
SPEC SHEET
Available:
764.00
Your Price:
0.48
Each
Item#:
8-208 N90
ID-0.625 CS-1/8
SPEC SHEET
Available:
291.00
Your Price:
0.52
Each
Item#:
8-209 N90
ID-0.687 CS-1/8
SPEC SHEET
Available:
80.00
Your Price:
0.52
Each
Item#:
8-210 N90
ID-0.75 CS-1/8
SPEC SHEET
Available:
498.00
Your Price:
0.52
Each
Item#:
8-211 N90
ID-0.812 CS-1/8
SPEC SHEET
Available:
115.00
Your Price:
0.54
Each
Item#:
8-212 N90
ID-0.875 CS-1/8
SPEC SHEET
Available:
224.00
Your Price:
0.56
Each
Item#:
8-213 N90
ID-0.937 CS-1/8
SPEC SHEET
Available:
748.00
Your Price:
0.56
Each
Item#:
8-214 N90
Available:
345.00
Your Price:
0.59
Each
Item#:
8-215 N90
ID-1.062 CS-1/8
SPEC SHEET
Available:
179.00
Your Price:
0.59
Each
Item#:
8-216 N90
ID-1.125 CS-1/8
SPEC SHEET
Available:
547.00
Your Price:
0.64
Each
Item#:
8-217 N90
ID-1.187 CS-1/8
SPEC SHEET
Available:
474.00
Your Price:
0.65
Each
Item#:
8-218 N90
ID-1.25 CS-1/8
SPEC SHEET
Available:
986.00
Your Price:
0.65
Each
Item#:
8-219 N90
ID-1.312 CS-1/8
SPEC SHEET
Available:
145.00
Your Price:
0.73
Each
Item#:
8-220 N90
ID-1.375 CS-1/8
SPEC SHEET
Available:
278.00
Your Price:
0.78
Each
Item#:
8-221 N90
ID-1.437 CS-1/8
SPEC SHEET
Available:
494.00
Your Price:
0.76
Each
Item#:
8-222 N90
ID-1.5 CS-1/8
SPEC SHEET
Available:
146.00
Your Price:
0.80
Each
Item#:
8-223 N90
ID-1.625 CS-1/8
SPEC SHEET
Available:
195.00
Your Price:
0.86
Each
Item#:
8-224 N90
ID-1.75 CS-1/8
SPEC SHEET
Available:
913.00
Your Price:
0.90
Each
Item#:
8-225 N90
ID-1.875 CS-1/8
SPEC SHEET
Available:
265.00
Your Price:
1.01
Each
Item#:
8-226 N90
Available:
429.00
Your Price:
1.09
Each
Item#:
8-227 N90
ID-2.125 CS-1/8
SPEC SHEET
Available:
491.00
Your Price:
1.21
Each
Item#:
8-228 N90
ID-2.25 CS-1/8
SPEC SHEET
Available:
1060.00
Your Price:
1.25
Each
Item#:
8-229 N90
ID-2.375 CS-1/8
SPEC SHEET
Available:
234.00
Your Price:
1.30
Each
Item#:
8-230 N90
ID-2.5 CS-1/8
SPEC SHEET
Available:
214.00
Your Price:
1.35
Each
Item#:
8-231 N90
ID-2.625 CS-1/8
SPEC SHEET
Available:
501.00
Your Price:
1.43
Each