568 BUNA-N BN90

Seal Information (568 BUNA-N 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 :	(568) – (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.

A Nom ID
0.031″ 1⁄32″
0.046″ 3⁄64″
0.062″ 1⁄16″
0.078″ 5⁄64″
0.093″ 3⁄32″
0.125″ 1⁄8″
0.156″ 5⁄32″
0.187″ 3⁄16″
0.218″ 7⁄32″
0.25″ 1⁄4″
0.312″ 5⁄16″
0.375″ 3⁄8″
0.437″ 7⁄16″
0.5″ 1⁄2″
0.562″ 9⁄16″
0.625″ 5⁄8″
0.687″ 11⁄16″
0.75″ 3⁄4″
0.812″ 13⁄16″
0.875″ 7⁄8″
0.937″ 15⁄16″
1″ 1 ″
1.062″ 11⁄16″
1.125″ 11⁄8″
1.187″ 13⁄16″
1.25″ 11⁄4″
1.312″ 15⁄16″
1.375″ 13⁄8″
1.437″ 17⁄16″
1.5″ 11⁄2″
1.562″ 19⁄16″
1.625″ 15⁄8″
1.687″ 111⁄16″
1.75″ 13⁄4″
1.812″ 113⁄16″
1.875″ 17⁄8″
1.937″ 115⁄16″
2″ 2 ″
2.062″ 21⁄16″
2.125″ 21⁄8″
2.187″ 23⁄16″
2.25″ 21⁄4″
2.312″ 25⁄16″
2.375″ 23⁄8″
2.437″ 27⁄16″
2.5″ 21⁄2″
2.562″ 29⁄16″
2.625″ 25⁄8″
2.687″ 211⁄16″
2.75″ 23⁄4″
2.812″ 213⁄16″
2.875″ 27⁄8″
3″ 3 ″
3.125″ 31⁄8″
3.25″ 31⁄4″
3.375″ 33⁄8″
3.5″ 31⁄2″
3.625″ 35⁄8″
3.75″ 33⁄4″
3.875″ 37⁄8″
4″ 4 ″
4.125″ 41⁄8″
4.25″ 41⁄4″
4.375″ 43⁄8″
4.5″ 41⁄2″
4.625″ 45⁄8″
4.75″ 43⁄4″
4.875″ 47⁄8″
5″ 5 ″
5.125″ 51⁄8″
5.25″ 51⁄4″
5.375″ 53⁄8″
5.5″ 51⁄2″
5.625″ 55⁄8″
5.75″ 53⁄4″
5.875″ 57⁄8″
6″ 6 ″
6.25″ 61⁄4″
6.5″ 61⁄2″
6.75″ 63⁄4″
7″ 7 ″
7.25″ 71⁄4″
7.5″ 71⁄2″
7.75″ 73⁄4″
8″ 8 ″
8.25″ 81⁄4″
8.5″ 81⁄2″
8.75″ 83⁄4″
9″ 9 ″
9.25″ 91⁄4″
9.5″ 91⁄2″
9.75″ 93⁄4″
10″ 10 ″
10.5″ 101⁄2″
11″ 11 ″
11.5″ 111⁄2″
12″ 12 ″
12.5″ 121⁄2″
13″ 13 ″
13.5″ 131⁄2″
14″ 14 ″
14.5″ 141⁄2″
15″ 15 ″
15.5″ 151⁄2″
16″ 16 ″
16.5″ 161⁄2″
17″ 17 ″
17.5″ 171⁄2″
18″ 18 ″
18.5″ 181⁄2″
19″ 19 ″
19.5″ 191⁄2″
20″ 20 ″
21″ 21 ″
22″ 22 ″
23″ 23 ″
24″ 24 ″
25″ 25 ″
26″ 26 ″

B Nom OD
0.093″ 3⁄32″
0.140″ 9⁄64″
0.187″ 3⁄16″
0.203″ 13⁄64″
0.218″ 7⁄32″
0.25″ 1⁄4″
0.281″ 9⁄32″
0.312″ 5⁄16″
0.343″ 11⁄32″
0.375″ 3⁄8″
0.406″ 13⁄32″
0.437″ 7⁄16″
0.5″ 1⁄2″
0.562″ 9⁄16″
0.625″ 5⁄8″
0.687″ 11⁄16″
0.75″ 3⁄4″
0.812″ 13⁄16″
0.875″ 7⁄8″
0.937″ 15⁄16″
1″ 1 ″
1.062″ 11⁄16″
1.125″ 11⁄8″
1.187″ 13⁄16″
1.25″ 11⁄4″
1.312″ 15⁄16″
1.375″ 13⁄8″
1.437″ 17⁄16″
1.5″ 11⁄2″
1.562″ 19⁄16″
1.625″ 15⁄8″
1.687″ 111⁄16″
1.75″ 13⁄4″
1.812″ 113⁄16″
1.875″ 17⁄8″
1.937″ 115⁄16″
2″ 2 ″
2.062″ 21⁄16″
2.125″ 21⁄8″
2.187″ 23⁄16″
2.25″ 21⁄4″
2.312″ 25⁄16″
2.375″ 23⁄8″
2.437″ 27⁄16″
2.5″ 21⁄2″
2.562″ 29⁄16″
2.625″ 25⁄8″
2.687″ 211⁄16″
2.75″ 23⁄4″
2.812″ 213⁄16″
2.875″ 27⁄8″
2.937″ 215⁄16″
3″ 3 ″
3.062″ 31⁄16″
3.125″ 31⁄8″
3.187″ 33⁄16″
3.25″ 31⁄4″
3.375″ 33⁄8″
3.437″ 37⁄16″
3.5″ 31⁄2″
3.625″ 35⁄8″
3.687″ 311⁄16″
3.75″ 33⁄4″
3.875″ 37⁄8″
3.937″ 315⁄16″
4″ 4 ″
4.125″ 41⁄8″
4.187″ 43⁄16″
4.25″ 41⁄4″
4.375″ 43⁄8″
4.437″ 47⁄16″
4.5″ 41⁄2″
4.625″ 45⁄8″
4.687″ 411⁄16″
4.75″ 43⁄4″
4.875″ 47⁄8″
4.937″ 415⁄16″
5″ 5 ″
5.125″ 51⁄8″
5.187″ 53⁄16″
5.25″ 51⁄4″
5.375″ 53⁄8″
5.437″ 57⁄16″
5.5″ 51⁄2″
5.625″ 55⁄8″
5.687″ 511⁄16″
5.75″ 53⁄4″
5.875″ 57⁄8″
5.937″ 515⁄16″
6″ 6 ″
6.125″ 61⁄8″
6.187″ 63⁄16″
6.25″ 61⁄4″
6.375″ 63⁄8″
6.437″ 67⁄16″
6.5″ 61⁄2″
6.625″ 65⁄8″
6.687″ 611⁄16″
6.75″ 63⁄4″
6.875″ 67⁄8″
6.937″ 615⁄16″
7″ 7 ″
7.125″ 71⁄8″
7.187″ 73⁄16″
7.25″ 71⁄4″
7.375″ 73⁄8″
7.437″ 77⁄16″
7.5″ 71⁄2″
7.625″ 75⁄8″
7.687″ 711⁄16″
7.75″ 73⁄4″
7.875″ 77⁄8″
7.937″ 715⁄16″
8″ 8 ″
8.125″ 81⁄8″
8.187″ 83⁄16″
8.25″ 81⁄4″
8.375″ 83⁄8″
8.437″ 87⁄16″
8.5″ 81⁄2″
8.625″ 85⁄8″
8.687″ 811⁄16″
8.75″ 83⁄4″
8.875″ 87⁄8″
8.937″ 815⁄16″
9″ 9 ″
9.125″ 91⁄8″
9.187″ 93⁄16″
9.25″ 91⁄4″
9.375″ 93⁄8″
9.437″ 97⁄16″
9.5″ 91⁄2″
9.625″ 95⁄8″
9.687″ 911⁄16″
9.75″ 93⁄4″
9.875″ 97⁄8″
9.937″ 915⁄16″
10″ 10 ″
10.12″ 10.12 ″
10.25″ 101⁄4″
10.37″ 103⁄8″
10.5″ 101⁄2″
10.75″ 103⁄4″
10.87″ 107⁄8″
11″ 11 ″
11.25″ 111⁄4″
11.37″ 113⁄8″
11.5″ 111⁄2″
11.75″ 113⁄4″
11.87″ 117⁄8″
12″ 12 ″
12.25″ 121⁄4″
12.37″ 123⁄8″
12.5″ 121⁄2″
13″ 13 ″
13.25″ 131⁄4″
13.37″ 133⁄8″
13.5″ 131⁄2″
14″ 14 ″
14.25″ 141⁄4″
14.37″ 143⁄8″
14.5″ 141⁄2″
15″ 15 ″
15.25″ 151⁄4″
15.37″ 153⁄8″
15.5″ 151⁄2″
16″ 16 ″
16.25″ 161⁄4″
16.37″ 163⁄8″
16.5″ 161⁄2″
17″ 17 ″
17.25″ 171⁄4″
17.37″ 173⁄8″
17.5″ 171⁄2″
18″ 18 ″
18.25″ 181⁄4″
18.37″ 183⁄8″
18.5″ 181⁄2″
19″ 19 ″
19.37″ 193⁄8″
19.5″ 191⁄2″
20″ 20 ″
20.37″ 203⁄8″
20.5″ 201⁄2″
21.37″ 213⁄8″
21.5″ 211⁄2″
22.37″ 223⁄8″
22.5″ 221⁄2″
23.37″ 233⁄8″
23.5″ 231⁄2″
24.37″ 243⁄8″
24.5″ 241⁄2″
25.37″ 253⁄8″
25.5″ 251⁄2″
26.37″ 263⁄8″
26.5″ 261⁄2″

Clear Filters

Product	Cross Section	A Nom ID	B Nom OD	C Nom Hgt	Availability
568-001 BN90 [50]	1⁄32″ 0.040	1⁄32″ 0.031″	3⁄32″ 0.093″	0.040″ 1⁄32″	STOCK
568-002 BN90 [50]	3⁄64″ 0.050	3⁄64″ 0.046″	9⁄64″ 0.140″	0.050″ 3⁄64″	STOCK
568-003 BN90 [50]	1⁄16″ 0.060	1⁄16″ 0.062″	3⁄16″ 0.187″	0.060″ 1⁄16″	STOCK
568-004 BN90 [50]	1⁄16″ 0.070	5⁄64″ 0.078″	13⁄64″ 0.203″	0.070″ 1⁄16″	STOCK
568-005 BN90 [50]	1⁄16″ 0.070	3⁄32″ 0.093″	7⁄32″ 0.218″	0.070″ 1⁄16″	STOCK
568-006 BN90 [50]	1⁄16″ 0.070	1⁄8″ 0.125″	1⁄4″ 0.25″	0.070″ 1⁄16″	STOCK
568-007 BN90 [50]	1⁄16″ 0.070	5⁄32″ 0.156″	9⁄32″ 0.281″	0.070″ 1⁄16″	STOCK
568-008 BN90 [50]	1⁄16″ 0.070	3⁄16″ 0.187″	5⁄16″ 0.312″	0.070″ 1⁄16″	STOCK
568-009 BN90 [50]	1⁄16″ 0.070	7⁄32″ 0.218″	11⁄32″ 0.343″	0.070″ 1⁄16″	STOCK
568-010 BN90 [50]	1⁄16″ 0.070	1⁄4″ 0.25″	3⁄8″ 0.375″	0.070″ 1⁄16″	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.