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Technical Data Sheet
PartsTable / COMPONENT / CR79556PC96
CR79556PC96 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The PACKING,PREFORMED is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC OVERALL, rim_surface_width: 0.250 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN, inner_groove_width: 0.156 INCHES NOMINAL IN, peripheral_diameter: 4.250 INCHES MINIMUM AND 4.266 INCHES MAXIMUM IN, center_hole_diameter: 3.750 INCHES NOMINAL IN, cross-sectional_height: 0.312 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-286-7271, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
CR79556PC96
NSN: 5330-00-286-7271
FSC: 5330
CAGE: 62983 — EATON AEROSPACE, LLC DBA JACKSON SOUTH (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
rim_surface_width0.250 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN
inner_groove_width0.156 INCHES NOMINAL IN
peripheral_diameter4.250 INCHES MINIMUM AND 4.266 INCHES MAXIMUM IN
center_hole_diameter3.750 INCHES NOMINAL IN
cross-sectional_height0.312 INCHES NOMINAL IN
cross-sectional_shape_styleSPECIAL
NSN5330-00-286-7271
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: CR79556PC96 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
PERIPHERAL DIAMETER: 4.250 INCHES MINIMUM AND 4.266 INCHES MAXIMUM IN
•
RIM SURFACE WIDTH: 0.250 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: SPECIAL
•
CENTER HOLE DIAMETER: 3.750 INCHES NOMINAL IN
•
MATERIAL: RUBBER SYNTHETIC OVERALL
•
INNER GROOVE WIDTH: 0.156 INCHES NOMINAL IN
•
CROSS-SECTIONAL HEIGHT: 0.312 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
PERIPHERAL DIAMETER4.250 INCHES MINIMUM AND 4.266 INCHES MAXIMUM IN
RIM SURFACE WIDTH0.250 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLESPECIAL
CENTER HOLE DIAMETER3.750 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC OVERALL
INNER GROOVE WIDTH0.156 INCHES NOMINAL IN
CROSS-SECTIONAL HEIGHT0.312 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
53556Interchangeable
interchangeable cross-reference
interchangeable
C12505Interchangeable
interchangeable cross-reference
interchangeable
110S 7/8Interchangeable
interchangeable cross-reference
interchangeable
42156Interchangeable
interchangeable cross-reference
interchangeable
XM-36480-34-4300-O-LInterchangeable
interchangeable cross-reference
interchangeable
CR76570PC59Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is CR79556PC96?
CR79556PC96 is a PACKING,PREFORMED.
What parts can replace CR79556PC96?
There are 14 known substitutes for CR79556PC96: 53556, C12505, 110S 7/8 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for CR79556PC96?
CR79556PC96 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-286-7271. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026