BU BN90

BU BN90 BACKUP-UP O-RING by Patriot Fluid Power
Seal Information (BU BN90)
MATERIAL :BUNA-N RUBBER
TEMPERATURE RANGE :-70°F (-57°C) TO +250°F (121°C) Depending on compound
PRESSURE RANGE :Varies based on Diametrical Clearance (See Chart)
PART NUMBER :(BU)-(Dash No.)(BN90)
Chemical Compatibility :– Water
– Aliphatic Hydrocarbons (petroleum oils, mineral oil, mineral grease, diesel fuel, fuel oils, propane) vegetable oils
– Dilute acids, alkali & salt solutions – HFB, HFA & HFC Fluids
Buna-N, also known as Nitrile rubber, NBR, and acrylonitrile butadiene rubber, is a synthetic rubber copolymer of acrylonitrile (ACN) and butadiene. One of the most commonly used compounds in Hydraulics and Pneumatics.
Cross Section
1/16″
116
1/4″
14
1/8″
18
3/16″
316
3/32″
332
A Nom ID
1″
1/16″
116
1/16″
116
1/16″
116
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/8″
18
1/8″
18
1/8″
18
1/8″
18
1/8″
18
1/8″
18
11/16″
1116
11/16″
1116
11/16″
1116
13/16″
1316
13/16″
1316
13/16″
1316
15/16″
1516
15/16″
1516
2″
2/7/8″
2/7/8 
3″
4″
5″
6″
7″
8″
9″
10″
10 
11″
11 
12″
12 
13″
13 
14″
14 
15″
15 
16″
16 
17″
17 
18″
18 
19″
19 
20″
20 
21″
21 
22″
22 
23″
23 
24″
24 
25″
25 
26″
26 
3/16″
316
3/16″
316
3/16″
316
3/32″
332
3/4″
34
3/4″
34
3/4″
34
3/4″
34
3/4″
34
3/4″
34
3/4″
34
3/4″
34
3/4″
34
3/4″
34
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
5/16″
516
5/16″
516
5/16″
516
5/32″
532
5/64″
564
5/8″
58
5/8″
58
5/8″
58
5/8″
58
5/8″
58
5/8″
58
7/16″
716
7/16″
716
7/16″
716
7/32″
732
7/8″
78
7/8″
78
7/8″
78
7/8″
78
7/8″
78
7/8″
78
9/16″
916
9/16″
916
9/16″
916
B Nom OD
1″
1/16″
116
1/16″
116
1/16″
116
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/2″
12
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/4″
14
1/8″
18
1/8″
18
1/8″
18
1/8″
18
1/8″
18
1/8″
18
1/8″
18
1/8″
18
1/8″
18
1/8″
18
11/16″
1116
11/16″
1116
11/16″
1116
11/16″
1116
11/16″
1116
11/16″
1116
11/16″
1116
11/16″
1116
11/16″
1116
11/16″
1116
11/32″
1132
13/16″
1316
13/16″
1316
13/16″
1316
13/32″
1332
13/64″
1364
15/16″
1516
15/16″
1516
15/16″
1516
15/16″
1516
15/16″
1516
15/16″
1516
15/16″
1516
15/16″
1516
15/16″
1516
15/16″
1516
2″
3″
10″
10 
11″
11 
12″
12 
13″
13 
14″
14 
15″
15 
16″
16 
17″
17 
18″
18 
19″
19 
20″
20 
3/16″
316
3/16″
316
3/16″
316
3/16″
316
3/16″
316
3/16″
316
3/16″
316
3/16″
316
3/16″
316
3/4″
34
3/4″
34
3/4″
34
3/4″
34
3/4″
34
3/4″
34
3/4″
34
3/4″
34
3/4″
34
3/4″
34
3/4″
34
3/4″
34
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
3/8″
38
4″
5″
5/16″
516
5/16″
516
5/16″
516
5/8″
58
5/8″
58
5/8″
58
5/8″
58
5/8″
58
5/8″
58
5/8″
58
5/8″
58
5/8″
58
5/8″
58
6″
7″
7/16″
716
7/16″
716
7/16″
716
7/16″
716
7/16″
716
7/16″
716
7/16″
716
7/16″
716
7/16″
716
7/16″
716
7/32″
732
7/8″
78
7/8″
78
7/8″
78
7/8″
78
7/8″
78
7/8″
78
7/8″
78
7/8″
78
7/8″
78
7/8″
78
7/8″
78
7/8″
78
8″
9″
9/16″
916
9/16″
916
9/16″
916
9/32″
932
C Nom Hgt
0.049″
0.049 
0.05″
0.05 
0.053″
0.053 
0.076″
0.076 
0.117″
0.117 
Clear Filters
Product Cross SectionA Nom IDB Nom ODC Nom HgtAvailability
BU‑214 BN90 18
1/8″
1″
114
1/4″
0.05 
0.05″
STOCK
BU‑022 BN90 116
1/16″
1″
118
1/8″
0.049 
0.049″
STOCK
BU‑120 BN90 332
3/32″
1″
1316
3/16″
0.053 
0.053″
STOCK
BU‑318 BN90 316
3/16″
1″
138
3/8″
0.076 
0.076″
STOCK
BU‑137 BN90 332
3/32″
2116
1/16″
214
1/4″
0.053 
0.053″
STOCK
BU‑102 BN90 332
3/32″
116
1/16″
14
1/4″
0.053 
0.053″
*1-3 Days
BU‑121 BN90 332
3/32″
1116
1/16″
114
1/4″
0.053 
0.053″
STOCK
BU‑023 BN90 116
1/16″
1116
1/16″
1316
3/16″
0.049 
0.049″
STOCK
BU‑215 BN90 18
1/8″
1116
1/16″
1516
5/16″
0.05 
0.05″
STOCK
BU‑319 BN90 316
3/16″
1116
1/16″
1716
7/16″
0.076 
0.076″
STOCK
BU‑448 BN90 14
1/4″
912
1/2″
10 
10″
0.117 
0.117″
STOCK
BU‑450 BN90 14
1/4″
1012
1/2″
11 
11″
0.117 
0.117″
STOCK
BU‑144 BN90 332
3/32″
212
1/2″
21116
11/16″
0.053 
0.053″
STOCK
BU‑153 BN90 332
3/32″
312
1/2″
31116
11/16″
0.053 
0.053″
STOCK
BU‑157 BN90 332
3/32″
412
1/2″
41116
11/16″
0.053 
0.053″
STOCK
BU‑161 BN90 332
3/32″
512
1/2″
51116
11/16″
0.053 
0.053″
STOCK
BU‑165 BN90 332
3/32″
612
1/2″
61116
11/16″
0.053 
0.053″
STOCK
BU‑169 BN90 332
3/32″
712
1/2″
71116
11/16″
0.053 
0.053″
STOCK
BU‑173 BN90 332
3/32″
812
1/2″
81116
11/16″
0.053 
0.053″
STOCK
BU‑177 BN90 332
3/32″
912
1/2″
91116
11/16″
0.053 
0.053″
STOCK
BU‑112 BN90 332
3/32″
12
1/2″
1116
11/16″
0.053 
0.053″
STOCK
BU‑128 BN90 332
3/32″
112
1/2″
11116
11/16″
0.053 
0.053″
STOCK
BU‑452 BN90 14
1/4″
1112
1/2″
12 
12″
0.117 
0.117″
STOCK
BU‑454 BN90 14
1/4″
1212
1/2″
13 
13″
0.117 
0.117″
STOCK
BU‑456 BN90 14
1/4″
1312
1/2″
14 
14″
0.117 
0.117″
STOCK
* This is an estimated delivery time, all delivery times may vary depending on factory lead times. A confirming sales order will be sent to you with updated delivery information when necessary.
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