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Technical Data Sheet
PartsTable / COMPONENT / C-4261 PC.12
C-4261 PC.12 ✓ 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 C-4261 PC.12 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-165-6576, 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
C-4261 PC.12
NSN: 5330-01-165-6576
FSC: 5330
CAGE: 99565 — ADMIRAL VALVE LLC DBA CPV MANUFACTURING (USA)
SPECIFICATIONS
Part NumberC-4261 PC.12
NSN5330-01-165-6576
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: C-4261 PC.12 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
•
TEMP RATING: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
ELONGATION PERCENTAGE: 160 MAXIMUM
•
PERIPHERAL DIAMETER: 1.887 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 1.599 INCHES MINIMUM AND 1.619 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
TEMP RATING-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
CRITICALITY CODE JUSTIFICATIONZZZY
ELONGATION PERCENTAGE160 MAXIMUM
PERIPHERAL DIAMETER1.887 INCHES NOMINAL IN
CENTER HOLE DIAMETER1.599 INCHES MINIMUM AND 1.619 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
1866-1Interchangeable
interchangeable cross-reference
interchangeable
6230-1Interchangeable
interchangeable cross-reference
interchangeable
BUNA-N-223Interchangeable
interchangeable cross-reference
interchangeable
8720PC32Interchangeable
interchangeable cross-reference
interchangeable
8720REVGPC32Interchangeable
interchangeable cross-reference
interchangeable
77741-17X2PC12Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C-4261 PC.12?
C-4261 PC.12 is a C-4261 PC.12.
What parts can replace C-4261 PC.12?
There are 24 known substitutes for C-4261 PC.12: 1866-1, 6230-1, BUNA-N-223 and 21 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C-4261 PC.12?
C-4261 PC.12 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-165-6576. 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