70 Durometer Buna-N O-Ring, Inch OD, 1-11/16 Inch ID, 0.10 Inch Width

Actual I.D.
1.67
Actual O.D.
1.88
Actual Width
0.103 in
Dash Size
-131
Brand
Hercules Sealing Products
Brand
Hercules Sealing Products
Pack Size
1.00
UOM
EA
Nominal I.D. (in)
1-11/16
Nominal O.D.
1-7/8
Nominal Width
3/32
Package Qty.
20
Supplier Part Number
568-131
Alternate Part Numbers
Alternate Part Number A-131, Alternate Part Number C1CD88, Alternate Part Number MI-08740370, Alternate Part Number MINO-00407X90370
Product Weight
0.01 lbs

Product Questions & Answers

got an old -131 o-ring here, is this the right dash size replacement or am i off a bit
Question by: Lance S on Jul 14, 2025, 8:13 PM
Match-up wise, this one is dash size -131 and cross references to supplier part 568-131. The nominal size is 1-11/16 inch ID with a 3/32 inch nominal width, and the actual measurements are about 1.674 inch ID and 0.103 inch width.
Answer by: Customer Support on Jul 16, 2025, 1:35 PM
what's the actual ID on this thing? the nominal says 1-11/16 but i need the exact number before i order
Question by: Brent B on Sep 1, 2025, 8:27 PM
Actual inside diameter comes in at 1.674 inches. The nominal 1-11/16 is just the catalog reference size, so when you're fitting this to a bore or shaft, 1.674 is the number to work with. Outside diameter runs 1.880 inches actual, and the cross-section width is 0.103 inches.
Answer by: Customer Support on Sep 3, 2025, 4:29 PM
these run from negative 40 up to 240 degrees fahrenheit?
Question by: Shawn M on Dec 19, 2025, 4:16 PM
that's the full range for this Buna-N compound. At 70 durometer it holds up well across that span without getting brittle on the cold end or going soft when things heat up. For most hydraulic and general fluid system applications that range covers just about everything you'd run into day to day.
Answer by: Customer Support on Dec 21, 2025, 6:42 AM
Will this o-ring hold up to hydraulic fluid, or do I need a different material?
Question by: Ray W on Aug 7, 2025, 2:34 PM
Buna-N is a good choice for hydraulic applications, as it offers decent resistance to petroleum-based fluids. Just make sure your system stays within the -40°F to 240°F temperature range that this o-ring is rated for.
Answer by: Customer Support on Aug 9, 2025, 7:07 AM

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A-341 -341 3-1/2 3-7/8 3/16 3.475 3.895 0.21 in 4
A-354 -354 5-1/8 5-1/2 3/16 5.1 5.52 0.21 in 4
A-357 -357 5-1/2 5-7/8 3/16 5.475 5.895 0.21 in 4
A-425 -425 4-1/2 5 1/4 4.475 5.025 0.275 in 4
A-433 -433 5-1/2 6 1/4 5.475 6.025 0.275 in 4
A-440 -440 6-3/4 7-1/4 1/4 6.725 7.275 0.275 in 2