Manufactured by Hercules Sealing Products, these Buna-N quad rings feature a four-lobed cross-section that provides a more stable sealing contact than standard O-rings, reducing spiral twist and minimizing seal failure in dynamic applications. The -111 dash size corresponds to a 7/16" inner diameter with a 3/32" cross-section, making this a commonly specified size across a range of hydraulic cylinders, actuators, and reciprocating rod and piston assemblies.
The Style QR Buna-N Quattro Rings, -111 Size, 5 Per Pack are rated for temperatures from -40°F to 240°F, with pressure performance that varies according to diametral clearance. Buna-N (nitrile) compound offers reliable compatibility with petroleum-based hydraulic fluids and general industrial fluids. Each pack contains five rings.
SKU: QR-4111
Supplier Part Number (MPN): QR-4111
Alternate Part Numbers: C1FC78, MI-01234885, MINO-00407X70515
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Specifications
Alternate Part Numbers
Alternate Part NumberC1FC78, Alternate Part Number MI-01234885, Alternate Part Number MINO-00407X70515
Dash Size
-111
Brand
Hercules Sealing Products
Brand
Hercules Sealing Products
Pack Size
1.00
UOM
EA
Package Qty.
5
Supplier Part Number
QR-4111
Product Weight
0.01 lbs
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Model Number
Dash Size
Package Qty.
Price
Action
QR-4111Style QR Buna-N Quattro Ring
-111
5
QR-4212Style QR Buna-N Quattro Ring
-212
5
QR-4005Style QR Buna-N Quattro Ring
-005
6
QR-4010Style QR Buna-N Quattro Ring
-010
6
QR-4011Style QR Buna-N Quattro Ring
-011
6
QR-4016Style QR Buna-N Quattro Ring
-016
5
QR-4110Style QR Buna-N Quattro Ring
-110
5
QR-4112Style QR Buna-N Quattro Ring
-112
5
QR-4113Style QR Buna-N Quattro Ring
-113
5
QR-4114Style QR Buna-N Quattro Ring
-114
5
QR-4115Style QR Buna-N Quattro Ring
-115
5
QR-4116Style QR Buna-N Quattro Ring
-116
5
QR-4117Style QR Buna-N Quattro Ring
-117
5
QR-4210Style QR Buna-N Quattro Ring
-210
5
QR-4211Style QR Buna-N Quattro Ring
-211
5
QR-4213Style QR Buna-N Quattro Ring
-213
5
QR-4214Style QR Buna-N Quattro Ring
-214
5
QR-4215Style QR Buna-N Quattro Ring
-215
5
QR-4216Style QR Buna-N Quattro Ring
-216
4
QR-4217Style QR Buna-N Quattro Ring
-217
4
QR-4218Style QR Buna-N Quattro Ring
-218
4
QR-4219Style QR Buna-N Quattro Ring
-219
4
Product Questions & Answers (3)
Question by: Lyle Y on Aug 16, 2025, 6:20 PM
What size o-ring housing does this fit?
Answer by: Customer Support on Aug 18, 2025, 7:50 AM
This Buna-N quattro ring is a -111 dash size, so it'll fit housings designed for that standard.
Question by: Rhonda R on Jan 18, 2026, 8:10 PM
i’ve got an old quad ring marked -111, is this the same size and how many come in the pack
Answer by: Customer Support on Jan 19, 2026, 8:35 PM
For sizing, this one is dash size -111, and the pack quantity is 5 rings.
Question by: Clint J on Jun 10, 2025, 10:35 AM
Will these Buna-N rings hold up okay in a hydraulic system running around 200 degrees F?
Answer by: Customer Support on Jun 12, 2025, 6:22 AM
Buna-N quattro rings like these are generally good up to about 240°F, so you should be fine at 200.
