70 Durometer Buna-N O-Ring, Inch OD, 6-1/2 Inch ID, 0.14 Inch Width

Actual I.D.
6.48
Actual O.D.
6.76
Actual Width
0.139 in
Dash Size
-260
Brand
Hercules Sealing Products
Brand
Hercules Sealing Products
Pack Size
1.00
UOM
EA
Nominal I.D. (in)
6-1/2
Nominal O.D.
6-3/4
Nominal Width
1/8
Package Qty.
2
Supplier Part Number
568-260
Alternate Part Numbers
Alternate Part Number 568-260, Alternate Part Number C1CF25, Alternate Part Number MI-08740467, Alternate Part Number MINO-00407X90467
Product Weight
0.02 lbs

Product Questions & Answers

Got a piece of equipment that calls out a -260 dash size o-ring, this the right one to grab?
Question by: Ricky R on Jan 15, 2026, 8:21 AM
that's the one. This ring is spec'd to the -260 dash size and meets standard AN/MS o-ring groove dimensions for that size, so it'll drop right into any assembly built around those specs. Actual measurements are 6.484 inches ID, 6.762 inches OD, and 0.139 inches on the cross-section. If your equipment was built to that dash size, you're in good shape.
Answer by: Customer Support on Jan 16, 2026, 11:10 AM
got a -260 o-ring groove on an older hydraulic setup, is this one the right match or am i gonna be fighting it
Question by: Brenda M on Oct 6, 2025, 3:25 PM
For a -260 dash size, this o-ring is made to fit standard AN/MS groove specs for that dash number. The actual size is 6.484 inch ID, 6.762 inch OD, with a 0.139 inch cross-section, so it lines up with -260 replacement sizing.
Answer by: Customer Support on Oct 8, 2025, 6:59 AM
Reckon these'll hold up alright in my tractor's hydraulic system? It gets pretty hot out in that field.
Question by: Curt R on May 28, 2025, 6:17 AM
These Buna-N o-rings are rated for service temps from -40°F up to 240°F, so they should be suitable for most hydraulic applications. Just make sure your system doesn't exceed that upper limit.
Answer by: Customer Support on May 30, 2025, 6:14 AM

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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