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Technical Data Sheet
PartsTable / O-RING / 2621-607-01 PC 65-4
2621-607-01 PC 65-4 ✓ 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 O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER FLUOROCARBON CLASS FPM, temp_rating: -20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF, hardness_rating: 90.0 SHORE DUROMETER A NOMINAL, outside_diameter: 1.637 INCHES NOMINAL IN, center_hole_diameter: 1.347 INCHES MINIMUM AND 1.371 INCHES MAXIMUM IN, cross-sectional_height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-166-1111, 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
2621-607-01 PC 65-4
NSN: 5331-00-166-1111
FSC: 5331 — O-RING
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialRUBBER FLUOROCARBON CLASS FPM
temp_rating-20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
hardness_rating90.0 SHORE DUROMETER A NOMINAL
outside_diameter1.637 INCHES NOMINAL IN
center_hole_diameter1.347 INCHES MINIMUM AND 1.371 INCHES MAXIMUM IN
cross-sectional_height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
NSN5331-00-166-1111
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2621-607-01 PC 65-4 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: -20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 1.347 INCHES MINIMUM AND 1.371 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 1.637 INCHES NOMINAL IN
•
MATERIAL: RUBBER FLUOROCARBON CLASS FPM
•
HARDNESS RATING: 90.0 SHORE DUROMETER A NOMINAL
TECHNICAL CHARACTERISTICS (FLIS)
TEMP RATING-20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
CENTER HOLE DIAMETER1.347 INCHES MINIMUM AND 1.371 INCHES MAXIMUM IN
OUTSIDE DIAMETER1.637 INCHES NOMINAL IN
MATERIALRUBBER FLUOROCARBON CLASS FPM
HARDNESS RATING90.0 SHORE DUROMETER A NOMINAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
AS3581-220Interchangeable
interchangeable cross-reference
interchangeable
AC180-220Interchangeable
interchangeable cross-reference
interchangeable
ARP568-220MILG23652TYPE2Interchangeable
interchangeable cross-reference
interchangeable
8126699-2Interchangeable
interchangeable cross-reference
interchangeable
9992-2Interchangeable
interchangeable cross-reference
interchangeable
35360064Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2621-607-01 PC 65-4?
2621-607-01 PC 65-4 is a O-RING.
What parts can replace 2621-607-01 PC 65-4?
There are 26 known substitutes for 2621-607-01 PC 65-4: AS3581-220, AC180-220, ARP568-220MILG23652TYPE2 and 23 more. Substitute compatibility should be verified for your specific system.
Is 2621-607-01 PC 65-4 still available?
2621-607-01 PC 65-4 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026