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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, lip seals, and as reciprocating shaft 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 (41)
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BU-T - PTFE U-CUP BACK UP - INCH (79)
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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 (141)
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MBN - NYLON U-CUP BACK UP - METRIC (65)
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MBT - SOLID TEFLON® U-CUP BACK UP - METRIC (166)
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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#:
8-232 N90
ID-2.75 CS-1/8
SPEC SHEET
Available:
1720.00
Your Price:
1.64
Each
Item#:
8-233 N90
ID-2.875 CS-1/8
SPEC SHEET
Available:
370.00
Your Price:
1.66
Each
Item#:
8-234 N90
Available:
213.00
Your Price:
1.80
Each
Item#:
8-235 N90
ID-3.125 CS-1/8
SPEC SHEET
Available:
107.00
Your Price:
2.01
Each
Item#:
8-236 N90
ID-3.25 CS-1/8
SPEC SHEET
Available:
329.00
Your Price:
2.03
Each
Item#:
8-237 N90
ID-3.375 CS-1/8
SPEC SHEET
Available:
430.00
Your Price:
2.12
Each
Item#:
8-238 N90
ID-3.5 CS-1/8
SPEC SHEET
Available:
437.00
Your Price:
2.14
Each
Item#:
8-239 N90
ID-3.625 CS-1/8
SPEC SHEET
Available:
246.00
Your Price:
2.14
Each
Item#:
8-240 N90
ID-3.75 CS-1/8
SPEC SHEET
Available:
775.00
Your Price:
2.27
Each
Item#:
8-241 N90
ID-3.875 CS-1/8
SPEC SHEET
Available:
295.00
Your Price:
2.41
Each
Item#:
8-242 N90
Available:
589.00
Your Price:
2.67
Each
Item#:
8-243 N90
ID-4.125 CS-1/8
SPEC SHEET
Available:
59.00
Your Price:
2.70
Each
Item#:
8-244 N90
ID-4.25 CS-1/8
SPEC SHEET
Available:
525.00
Your Price:
2.69
Each
Item#:
8-245 N90
ID-4.375 CS-1/8
SPEC SHEET
Available:
0.00
ETA:
07/13/2026
Your Price:
2.94
Each
Item#:
8-246 N90
ID-4.5 CS-1/8
SPEC SHEET
Available:
229.00
Your Price:
3.06
Each
Item#:
8-247 N90
ID-4.625 CS-1/8
SPEC SHEET
Available:
63.00
Your Price:
3.32
Each
Item#:
8-248 N90
ID-4.75 CS-1/8
SPEC SHEET
Available:
114.00
Your Price:
3.37
Each
Item#:
8-249 N90
ID-4.875 CS-1/8
SPEC SHEET
Available:
133.00
Your Price:
3.57
Each
Item#:
8-250 N90
Available:
151.00
Your Price:
3.81
Each
Item#:
8-251 N90
ID-5.125 CS-1/8
SPEC SHEET
Available:
71.00
Your Price:
4.10
Each
Item#:
8-252 N90
ID-5.25 CS-1/8
SPEC SHEET
Available:
263.00
Your Price:
4.40
Each
Item#:
8-253 N90
ID-5.375 CS-1/8
SPEC SHEET
Available:
103.00
Your Price:
4.59
Each
Item#:
8-254 N90
ID-5.5 CS-1/8
SPEC SHEET
Available:
113.00
Your Price:
4.86
Each
Item#:
8-255 N90
ID-5.625 CS-1/8
SPEC SHEET
Available:
28.00
Your Price:
5.04
Each
Item#:
8-256 N90
ID-5.75 CS-1/8
SPEC SHEET
Available:
80.00
Your Price:
5.18
Each
Item#:
8-257 N90
ID-5.875 CS-1/8
SPEC SHEET
Available:
26.00
Your Price:
5.27
Each
Item#:
8-258 N90
Available:
126.00
Your Price:
5.58
Each
Item#:
8-259 N90
ID-6.25 CS-1/8
SPEC SHEET
Available:
13.00
Your Price:
5.92
Each
Item#:
8-260 N90
ID-6.5 CS-1/8
SPEC SHEET
Available:
85.00
Your Price:
6.04
Each
Item#:
8-261 N90
ID-6.75 CS-1/8
SPEC SHEET
Available:
137.00
Your Price:
6.39
Each
Item#:
8-262 N90
Available:
33.00
Your Price:
6.94
Each
Item#:
8-263 N90
ID-7.25 CS-1/8
SPEC SHEET
Available:
104.00
Your Price:
7.34
Each
Item#:
8-264 N90
ID-7.5 CS-1/8
SPEC SHEET
Available:
98.00
Your Price:
8.43
Each
Item#:
8-265 N90
ID-7.75 CS-1/8
SPEC SHEET
Available:
46.00
Your Price:
8.37
Each
Item#:
8-266 N90
Available:
77.00
Your Price:
8.98
Each
Item#:
8-267 N90
ID-8.25 CS-1/8
SPEC SHEET
Available:
9.00
Your Price:
9.25
Each